AMT Tax: Who Actually Pays It and How to Know If You’re at Risk

Fact-checked by the MyFinancial101 editorial team

In 1969, Treasury Secretary Joseph Barr shocked Congress with a single statistic: 155 Americans earning more than $200,000 had paid zero federal income tax that year. The revelation triggered more constituent mail than the Vietnam War, and by the end of that session Congress had created what we now call the alternative minimum tax. The system was designed to ensure that a narrow class of very wealthy taxpayers couldn’t zero out their liability through aggressive deductions. More than five decades later, AMT still exists, but the taxpayers it touches look nothing like the 155 people who inspired it.

By 2017, bracket creep had pulled 5.2 million filers into AMT territory, the vast majority of them upper-middle-class households with no exotic shelters. The Tax Cuts and Jobs Act of 2017 corrected that drift by raising exemption amounts dramatically, and the number of affected filers dropped to roughly 200,000 by 2023, a reduction of about 96%. Then came the One Big Beautiful Bill Act, signed on July 4, 2025, which permanently preserved those higher exemptions but tightened the phase-out rules in ways that create fresh exposure for a specific income band. The result is a tax that affects far fewer people than it did a decade ago, but one that still carries real teeth for anyone with equity compensation, significant state taxes, or income in the $500,000 to $1 million range.

This guide walks through how AMT actually works, who genuinely faces exposure under the 2026 rules, what triggers the calculation, and how to find out whether you’re at risk before your tax return is due. By the end, you’ll be able to identify the specific factors on your own return that warrant attention, understand the legislative changes that took effect this year, and take concrete steps to reduce your exposure if you need to.

What the Alternative Minimum Tax Actually Is and Why It Exists

The most persistent myth about AMT is that it’s an extra tax layered on top of what you already owe. It isn’t. AMT is a parallel tax system. Every year, you run two separate calculations simultaneously: your regular income tax and your tentative minimum tax. You pay whichever one is higher. If your regular tax exceeds your tentative minimum tax, AMT has no effect on your bill. You only owe AMT when the tentative minimum tax is the larger number.

According to IRS Topic 556, the AMT “applies to taxpayers with high economic income by setting a limit on those benefits” and taxpayers “owe AMT only if the tentative minimum tax is more than the regular tax.” That framing matters: AMT doesn’t punish success across the board. It targets situations where a cluster of deductions or preference items has pushed regular tax unreasonably low relative to actual economic income.

The 1969 Origin and the Bracket Creep Problem

The 155-person scandal that launched AMT had a reasonable policy rationale behind it. High earners who were legally eliminating their entire tax liability through preferential treatment represented a genuine fairness problem. Congress’s solution was to define a broader income base, strip out the most aggressive preference items, and impose a minimum rate on that wider base.

The problem was indexing, or the lack of it. When AMT was created, the exemption amounts were fixed in nominal dollars. Inflation did the rest. Each year that wages rose and the exemption stayed flat, slightly more taxpayers found themselves subject to a system designed for 155 people. By the late 1990s, fewer than one million filers owed AMT. By 2017, that number had grown to 5.2 million, the majority of them in the $100,000 to $500,000 income range that Congress never intended to reach. The TCJA finally indexed the exemptions to inflation, which is why the number dropped so sharply.

The corporate AMT, separately, was also revived under the Inflation Reduction Act of 2022 at a 15% rate on book income for corporations with adjusted financial statement income exceeding $1 billion. That reform is a different calculation and affects businesses, not individual filers. The complexities of the corporate side are substantial enough that the AICPA formally requested Treasury guidance on its implementation, citing the difficulty companies would face in reporting the tax’s impact in financial filings given the volume of significant issues left to Treasury to resolve.

Who Actually Pays AMT Today

The shorthand “high earners pay AMT” is imprecise to the point of being misleading. The truly wealthy, households with taxable income above $1 million, generally don’t owe AMT because their regular tax at the 37% marginal rate already exceeds what AMT would calculate. The AMT rate tops out at 28%. At 37%, you’ve already cleared that bar on your regular return.

The real exposure zone sits in the $200,000 to $1,000,000 income range, with the highest concentration among taxpayers who also have large deductions or equity compensation. Think of a software engineer in San Jose earning $450,000 with significant ISO grants, or a physician practice owner in New Jersey with $280,000 in income and substantial state tax bills. Neither is ultra-wealthy, but both have the specific combination of income and preference items that makes AMT bite.

The Geography Factor

AMT is not neutral across ZIP codes. Under the regular tax code, you can deduct state and local taxes up to $10,000 under the TCJA SALT cap. Under AMT, SALT deductions are disallowed entirely, not just capped. For a household in California, New York, or New Jersey where state income tax alone can reach $20,000 to $40,000, that disallowance adds tens of thousands back into AMT income. A family that looks upper-middle-class by national standards but lives in a high-tax metro can clear the AMT exemption purely because of their ZIP code’s tax structure, not because of aggressive tax sheltering.

The Marriage Penalty Most Articles Miss

AMT imposes a marriage penalty that the regular tax code does not, and almost no popular explanation addresses it quantitatively. Under the 2026 rules, the AMT exemption for married filing jointly is $140,200. The exemption for a single filer is $90,100. That joint exemption is roughly 1.56 times the single amount. By contrast, the regular standard deduction for joint filers is exactly twice the single amount.

Two partners who both earn $90,000 (combined $180,000) might not owe AMT filing separately, but could face AMT exposure as a joint filer because the combined exemption doesn’t scale the same way their combined income does. The regular code gives you twice the deduction for marrying. AMT gives you only 1.56 times. Some couples owe AMT purely because of filing-status math, entirely separate from their income level or their deduction behavior.

How AMT Is Calculated: A Plain-Language Walkthrough

The calculation has five steps, and understanding each one is more useful than memorizing the rates. The official framework is detailed in the IRS Form 6251 instructions, which walk through every line of the computation. Here’s what each step means in plain terms.

The Five-Step Process

Step 1: Start with regular taxable income. Take the number from your regular Form 1040 after all deductions. This is your starting point for both systems.

Step 2: Add back preference items and adjustments. This is where AMT creates a wider income base. You add back SALT deductions, the standard deduction if you took it, the bargain element from ISO exercises, interest from private activity bonds, and certain depreciation differences. After all add-backs, you have your Alternative Minimum Taxable Income (AMTI).

Step 3: Subtract the AMT exemption. For 2026, the exemptions are $90,100 for single filers and $140,200 for married filing jointly, per IRS Form 6251. This is the threshold the system was designed to protect ordinary taxpayers from crossing. The problem is the phase-out, covered below.

Step 4: Apply the AMT rate. The first $232,600 of income above the exemption is taxed at 26%. Any amount above that threshold is taxed at 28%. This creates your tentative minimum tax (TMT).

Step 5: Compare and pay the higher amount. If your TMT exceeds your regular tax, you pay the difference as AMT. If regular tax is higher, you owe nothing extra.

Why the 26% to 28% Rate Is Less Favorable Than It Looks

Seeing rates of 26% and 28% while the top regular rate is 37% can create the impression that AMT is actually a softer system. For most taxpayers in the phase-out range, that impression is wrong. The AMT income base is far wider because you’ve added back deductions that reduced your regular income. You can end up paying 26% on income that was effectively zero-rated under the regular system.

There’s one genuine protection worth noting: long-term capital gains and qualified dividends retain their preferential 0%, 15%, and 20% rates inside the AMT calculation. They are not bumped to 26% or 28%. Investors whose income comes primarily from long-term gains face much lower AMT exposure than the headlines suggest, because those gains don’t change character when you shift to the AMT calculation.

The Six Biggest AMT Triggers

Not all deductions and income types are treated the same under AMT. A specific set of items, called preference items and adjustments, get added back to create AMTI. Knowing which ones affect your return is the fastest way to assess your own risk.

Incentive Stock Options: The Single Largest Trigger

When you exercise incentive stock options (ISOs) and hold the shares past December 31, the spread between your exercise price and the stock’s fair market value on exercise date gets added to your AMTI in full. That addition happens even though you received no cash. Exercise ISOs with a $400,000 bargain element, and that $400,000 flows directly into AMTI. After accounting for the exemption, you could face a tentative minimum tax bill exceeding $100,000 on shares you may not be able to sell easily.

This is the phantom income liquidity trap that catches startup employees off guard. You’ve exercised options in a private company, the shares can’t be sold because there’s no market, and yet you face a real six-figure tax obligation. Should the company’s valuation decline before you can sell, you may owe more in AMT than the shares are worth. This scenario deserves serious planning attention, not a footnote.

SALT, Private Activity Bonds, and Depreciation

State and local taxes are the second most common trigger. Under AMT, the entire SALT deduction is disallowed, not just amounts above the $10,000 TCJA cap. Pay $35,000 in state income and property taxes and deduct them under the regular system, and all $35,000 gets added back to AMTI.

Private activity municipal bond interest is a trigger that surprises many investors. Not all municipal bond interest is AMT-safe. Interest from private activity bonds (PABs), which are issued for certain private-use purposes like airports, housing facilities, and student loans, is added back to AMTI even though it’s tax-exempt under the regular calculation. Muni bond funds often hold a mix of PABs and non-PAB bonds, and the percentage isn’t always prominent in the fund literature. Checking the fund’s annual report for the AMT percentage is worth the five minutes it takes.

How the 2025 Legislation Changed the Rules for 2026

The One Big Beautiful Bill Act, signed on July 4, 2025, made several permanent changes to the individual AMT structure. The most significant outcomes: the higher TCJA exemption amounts were preserved, which is good news for the broad middle-income population. But the phase-out rules were reset in ways that create new exposure for a specific income band.

What Changed and What Didn’t

Under TCJA rules that applied through 2025, the phase-out rate for the AMT exemption was 25 cents per dollar. For every dollar of AMTI above the phase-out threshold, you lost a quarter of your exemption. The OBBBA doubled that rate to 50 cents per dollar. Simultaneously, the phase-out threshold for single filers was lowered from approximately $626,350 to $500,000.

The combined effect: a single filer with $600,000 in AMTI who was partially into the phase-out band under 2025 rules is now 100,000 dollars deeper into it, and losing their exemption twice as fast. At $680,200 in AMTI, the exemption is completely phased out. That same person would have retained a meaningful portion of their exemption under the prior rules.

Who Needs to Re-Run Projections

Anyone who earned between $500,000 and $1,000,000 in 2025 and concluded after last year’s filing that AMT didn’t apply should take a fresh look. The exemption is still available; it just disappears faster. Significant ISO activity, SALT exposure, or private activity bond holdings in that income range all warrant an AMTI projection before year-end, not at filing time when options are limited.

The change is also relevant for taxpayers who did owe AMT in 2025, because the faster phase-out rate affects the size of the AMT bill, not just whether it applies. A $5,000 AMT liability could grow meaningfully if the phase-out now eliminates a larger portion of the exemption than it did in the prior year.

How to Tell If You’re at Risk: A Practical Self-Assessment

Most articles about AMT leave readers more anxious than informed because they describe AMT exposure in vague terms without giving a concrete way to test for it. Here’s a specific process you can work through before speaking with an accountant.

The Decision Tree

Answer these questions about your current tax year. Any “yes” is a signal to run Form 6251 projections.

• Did you exercise ISOs this year and hold the shares past December 31?
• Do you live in California, New York, New Jersey, or another high-tax state and earn more than $200,000?
• Is your estimated AMTI within the phase-out band ($500,000 to $680,200 for single filers, $1,000,000 to $1,280,400 for joint filers)?
• Do you hold individual municipal bonds or muni bond funds that include private activity bonds?
• Do you have significant accelerated depreciation on rental or business property?
• Are you married with a combined income above $250,000, particularly if filing jointly erases a large deduction?

One “yes” means awareness is warranted. Two or more means projecting your tentative minimum tax before year-end is worth doing regardless of cost.

The Form 6251 Shortcut

Pull out Form 6251 from last year’s return and look at the Tentative Minimum Tax line. Compare it to your regular tax for that year. A gap of less than $5,000 puts you in the warning zone. Any year where TMT was within striking distance of regular tax means this year’s projection could cross the line, especially if income increased or you exercised more options.

For most tax software users, the software runs both calculations in the background automatically. The quickest check is simply to look at the final AMT line on the completed return. If it shows a non-zero number, you paid AMT. If it’s blank, you didn’t, but you can still check how close you came by reviewing the TMT versus regular tax figures on Form 6251.

For taxpayers who want to understand their broader financial position alongside AMT exposure, reviewing your complete tax situation alongside other income sources makes sense. Those also thinking about cryptocurrency investments should note that short-term crypto gains are treated as ordinary income for AMT purposes and can contribute to a higher AMTI in the same way any other ordinary income would.

The AMT Credit: Recovering What You Paid

One of the most consistently underreported facts about AMT is that the tax you pay because of an ISO exercise isn’t necessarily gone. When AMT arises from a timing difference, meaning a situation where income is recognized in one year for AMT but a later year for regular tax, the AMT you paid converts to a Minimum Tax Credit (MTC). That credit carries forward indefinitely using Form 8801 and can be used in any future year where your regular tax exceeds your tentative minimum tax.

How the Recovery Actually Works

The practical mechanics are simpler than many taxpayers expect. You don’t need to sell your ISO shares to start recovering AMT credits. In any year where regular tax exceeds TMT by a meaningful margin, you can apply MTC to reduce your regular tax bill. Practitioners commonly see $5,000 to $10,000 of credit recovered in years where no stock sale occurred, simply because income from other sources creates a gap between the two calculations.

AMT on ISO timing differences is often a temporary prepayment, not a permanent cost. You overpay relative to your eventual regular tax obligation in the exercise year, and you recover that prepayment over time. The length of that recovery period is the real variable.

When the Credit Gets Trapped

Here’s the scenario most AMT articles skip entirely. You exercise ISOs, owe $80,000 in AMT, and accumulate $80,000 in MTC. Then the stock price collapses. In the years after the collapse, your income is primarily salary. Your regular tax and your TMT end up very close to each other, because without large ISO exercises or other add-back items, the two calculations produce similar results. The gap required to absorb significant AMT credit simply doesn’t exist.

The credit never expires, which is genuinely useful. But a 10-year or 15-year recovery period carries real time-value costs. Pay $80,000 in AMT in 2026 and recover $5,000 per year, and you’ve waited 16 years to get whole, with every dollar of that recovery worth less than it was when you paid. That’s the honest trade-off that deserves more attention than the “credits carry forward forever” reassurance typically gets.

Practical Strategies to Reduce AMT Exposure

The most effective AMT planning happens before December 31, not at filing time. Once the tax year closes, your AMTI is largely fixed. These are the moves that actually shift the number before it’s locked in.

ISO Exercise Timing and Spreading

Exercising a large ISO grant in a single year is the fastest way to trigger AMT at scale. Spreading exercises across multiple years keeps the annual bargain element below the phase-out threshold. A $600,000 ISO grant exercised in one year creates a $600,000 AMTI add-back. Spread over three years, each installment stays at $200,000, which is well below the point where the phase-out begins to eliminate your exemption.

The same logic applies to capital gains timing. Near the phase-out threshold with unrealized gains you were planning to realize, bunching them into a single year can push AMTI into the phase-out band and increase your effective marginal rate above the stated 26% to 28%. Spreading realizations across years can keep you below the phase-out floor.

Pre-Tax Accounts and the SALT Trap

Maximizing contributions to 401(k) plans and HSAs reduces AGI directly, which flows through to a lower AMTI. Every dollar contributed pre-tax is a dollar that doesn’t enter the AMT calculation. For someone near the phase-out threshold, reducing AMTI by $10,000 through retirement contributions preserves $5,000 of AMT exemption under the current 50% phase-out rate, creating a compounding benefit.

The SALT prepayment strategy, which involves paying Q4 state estimated taxes in December to accelerate the deduction into the current year, is a popular regular-tax move. In an AMT year, it’s useless at best and potentially counterproductive. SALT is disallowed entirely under AMT, so prepaying state taxes does nothing to your AMTI. The decision about when to pay Q4 state estimates should be driven by your next year’s tax situation, not the current one. Knowing which years you’re subject to AMT changes whether that move makes financial sense.

The State AMT Layer Most People Never See Coming

Federal AMT gets most of the attention, but several states maintain their own separate minimum taxes that run parallel to the federal calculation. California, Colorado, Connecticut, and Minnesota each have individual AMT provisions. For residents of those states, the tax exposure is potentially more complex than any federal-only analysis captures.

California’s Separate AMT Calculation

California imposes its own AMT at a 7% rate, calculated on California AMTI using adjustments that differ from the federal rules. The California AMT also disallows SALT deductions but uses California-specific preference items and doesn’t mirror the federal exemption amounts exactly. A California resident who doesn’t owe federal AMT can still owe California AMT, and vice versa.

The practical implication is that some California taxpayers must run four separate tax calculations: federal regular tax, federal AMT, California regular tax, and California AMT. The combination of California’s high state income tax rate (up to 13.3%) and its own AMT structure makes California residents among the most AMT-exposed in the country. High-income Californians with ISO exercises or significant investment income need to understand both federal and state AMT simultaneously for accurate tax planning.

Broader awareness of how the tax system affects overall financial health matters when navigating multiple income sources and tax obligations. Understanding how credits and deductions interact is directly relevant to the kind of tax planning covered in articles like free IRS tax help options and overlooked credits for 2025 filers, and many of the same planning principles apply to AMT situations.

For taxpayers focused on broader financial planning, AMT exposure is one piece of a larger picture that includes retirement savings, debt management, and income optimization. Resources on how to prioritize and negotiate credit card debt address the liability side of the equation. Those building savings to fund eventual AMT liabilities from stock option exercises will find the basics of starting an investment portfolio from scratch directly relevant to building the liquidity buffer that ISO exercises often require.

Your Action Plan

1. Pull last year’s Form 6251 and find the Tentative Minimum Tax line

   Compare your TMT to your regular tax from the prior year. A gap of less than $5,000 puts you in the warning zone and warrants a projection before December 31. Never having seen a Form 6251 on your return is evidence you weren’t close, but the exercise is still worth completing if you have any of the risk factors listed in this article.

2. Map your AMT risk factors before year-end

   Work through the decision tree in the self-assessment section: ISO exercises, SALT exposure in high-tax states, private activity bonds, rental property depreciation, and income level relative to the $500,000 to $1,000,000 phase-out band. Any combination of two or more factors warrants a full AMTI projection, not just a mental estimate.

3. Project AMTI before exercising ISOs

   With ISO grants in hand, calculate the bargain element before deciding how many to exercise in a given year. The goal is to stay below the phase-out threshold when possible, or to spread exercises across years to keep annual AMTI additions manageable. Your equity plan statement shows the grant price; your company’s current fair market value, or stock price for public companies, provides the other number you need.

4. Check your muni bond holdings for private activity bond exposure

   Holders of individual municipal bonds or muni bond funds should review the annual or semi-annual report for the percentage of interest income subject to AMT. Any portion from private activity bonds will be added back to your AMTI. Consider whether swapping those holdings for AMT-exempt general obligation bonds or pre-2009 non-PAB municipals makes sense in the context of your overall portfolio.

5. Maximize pre-tax retirement and health savings account contributions

   401(k), 403(b), and HSA contributions reduce AGI dollar for dollar, which flows directly into a lower AMTI. For 2026, the 401(k) contribution limit is $23,500 for those under 50, with a $7,500 catch-up for those 50 and older. An HSA contribution for a family plan adds another $8,300 in AGI reduction. These moves benefit regular tax and AMT simultaneously, making them efficient regardless of which calculation ends up controlling your bill. For background on retirement-focused planning, the discussion of prioritizing retirement savings over other financial goals is directly relevant here.

6. Skip the SALT prepayment in an AMT year

   Prepaying Q4 state estimated taxes in December has no effect on AMTI because SALT is disallowed entirely under AMT. In an AMT year, redirect that cash toward pre-tax retirement contributions or building liquidity to cover the AMT bill itself. Determine which system will govern your tax before choosing year-end strategies that only benefit one of the two calculations.

7. Track your Minimum Tax Credit balance if you’ve ever owed AMT

   Prior AMT on an ISO exercise accumulates on Form 8801 as a credit. Calculate the gap between your regular tax and TMT each year to determine how much of that credit you can absorb. Even without selling ISO shares, a meaningful credit recovery may be available in years when your income mix creates a large gap between the two calculations.

8. Consult a CPA or tax advisor if you have multiple risk factors

   AMT interacts with other tax provisions in ways that can’t always be modeled accurately with consumer tax software alone. ISOs, significant investment income, rental property, and a state with its own AMT are a combination that warrants professional projection before year-end. The planning window closes December 31; filing-time analysis can only document what happened, not change it. Resources like reputable financial counseling services can also point you toward qualified tax professionals if you need help finding one.

Frequently Asked Questions

Does AMT apply to everyone who earns over $200,000?

No. Income level alone doesn’t determine AMT exposure. A single filer earning $200,000 entirely from W-2 wages with no ISOs, no large itemized deductions, and no private activity bonds will almost certainly not owe AMT. The tax targets specific combinations of income level and preference items. High income is a necessary condition for exposure in most cases, but it isn’t sufficient on its own. AMT is far more likely when high income intersects with specific deductions or compensation structures.

Can someone earning $500,000 avoid AMT entirely?

Yes, depending on how that income is structured. Income consisting primarily of long-term capital gains and qualified dividends retains its 0%, 15%, or 20% tax treatment inside the AMT calculation and doesn’t drive a significant gap between regular tax and TMT. An investor at $500,000 in long-term gains is in a very different AMT position than an employee at $500,000 with a large ISO exercise and $40,000 in SALT deductions. The composition of income matters as much as the total.

What’s the difference between AMT and regular tax for married couples?

The regular tax system gives joint filers a standard deduction that is exactly twice the single filer’s amount, reflecting the combined household. AMT’s joint exemption is only about 1.56 times the single exemption. That gap creates a marriage penalty in the AMT system that doesn’t exist in the regular code: two spouses who would each fall below the AMT exposure zone individually may owe AMT when their incomes are combined, because the exemption doesn’t scale proportionally with their combined income.

How do I know if my municipal bonds are subject to AMT?

For individual bonds, the bond’s official statement (or CUSIP lookup on a financial data service) will indicate whether the bond is a private activity bond. For mutual funds and ETFs, the fund’s annual report discloses the percentage of interest income attributable to AMT-subject bonds. That disclosure is often listed as “percentage of income subject to federal alternative minimum tax” in the shareholder reports. Bonds issued before August 8, 1986, are generally not subject to AMT even if they are technically private activity bonds.

What happens to my AMT credit if I never earn enough to use it?

AMT credits carry forward indefinitely with no expiration. They can be used in any future year when regular tax exceeds tentative minimum tax, and there’s no time limit on that recovery period. If you die before using the full credit, the remaining balance can pass to your estate. Unused credits provide no cash benefit in years when regular tax and TMT are close together, so the practical limitation is the gap between the two calculations in any given year, not an expiration date.

Does the standard deduction help or hurt under AMT?

The standard deduction is disallowed entirely under AMT. Taking the standard deduction on your regular return means that entire amount gets added back to create AMTI. Taxpayers who don’t itemize can still face AMT if their other income and preference items push AMTI high enough. For most W-2 workers below $200,000 with no special compensation, the standard deduction add-back alone won’t create AMT exposure because the AMT exemption absorbs most of the difference. For higher-income non-itemizers with other add-back items, the standard deduction disallowance is a real factor.

What is the AMT rate for long-term capital gains?

Long-term capital gains and qualified dividends are taxed at the same preferential rates inside the AMT calculation as they are under the regular system: 0%, 15%, or 20% depending on income level. They are not converted to ordinary AMT rates of 26% or 28%. This is one of the most important and underreported facts about AMT. Investors whose income is predominantly from long-term capital gains have substantially less AMT exposure than those with equivalent amounts of ordinary income or ISO add-backs.

If I exercise ISOs and then sell the same year, does AMT still apply?

Exercising and selling ISOs in the same calendar year creates a disqualifying disposition. The income is reported as ordinary income on your W-2 rather than as an AMT preference item. The bargain element still exists but flows through the regular tax system as ordinary compensation income. The AMT phantom income problem, owing tax on paper gains you haven’t realized in cash, only occurs when you exercise and hold the shares past December 31, triggering AMT on the spread without a corresponding sale.

Can I reduce AMT by giving more to charity?

Charitable deductions are treated the same under both the regular tax system and AMT for cash donations and appreciated property gifts. Unlike SALT deductions, which are disallowed under AMT, charitable contributions reduce AMTI as well as regular taxable income. So charitable giving is one of the few itemized deductions that functions as an AMT planning tool. Bunching charitable contributions into a high-income year, or directing highly appreciated stock to a donor-advised fund, can meaningfully reduce AMTI while also satisfying regular-tax deduction goals.

Is there an easy way to tell if I was close to AMT last year without doing a full calculation?

Yes. Look at Form 6251 from your prior-year return, or ask your tax preparer to print it. Find Line 1 (AMTI) and Line 7 or 12 (Tentative Minimum Tax, depending on the version). Compare the TMT to your regular tax from Form 1040. A TMT within 10% of your regular tax means you were close. Tax software calculates both figures automatically, and some programs flag proximity to AMT with a notification, though the specific implementation varies by product. Reviewing this single comparison annually takes less than five minutes and eliminates a great deal of AMT-related uncertainty. For a broader look at how tax season preparation connects to financial planning, the piece on getting ahead of tax season early covers complementary ground.