How to effectively use AMT carry forward credits on my 2025 tax return

I exercised some ISO shares about 3 years ago and ended up paying Alternative Minimum Tax on them at that time. Now I've got a pretty substantial AMT credit that I'm carrying forward - around $115,000 for my 2024 return. My current situation is that I have regular income tax due of about $15,000 this year, and I don't owe any AMT for 2024. When I was working through my return using TaxSlayer, it did all the calculations and is only letting me use $7,500 of my AMT credit against my current tax bill. I'm really confused about this. Why can't I apply more of my AMT carry forward to cover my entire $15,000 tax bill? What exactly limits how much of my AMT carry forward credit I can use each year? I thought the whole point was to eventually get back what I overpaid, but at this rate it'll take forever to use up my credit.

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19 comments

Yara Sayegh

The AMT credit can be tricky! Your question about why you can't use the full amount is a common one. The AMT credit can only offset the difference between your regular tax liability and your tentative minimum tax (TMT) for the current year. Even though you don't owe AMT this year, the tax software still calculates your tentative minimum tax. The maximum AMT credit you can claim is limited to the amount that your regular tax exceeds your TMT. So if your regular tax is $15,000 and your TMT is $7,500, you can only use $7,500 of your AMT credit carryforward this year. This is why the software is only allowing you to use $7,500 rather than the full $15,000 - there's still a calculated TMT amount that creates a ceiling for how much credit you can use in any given year.

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Yara Sayegh

Yes, you've got it exactly right. Even when you don't owe AMT for the current year, the tax code still requires calculating what your tentative minimum tax would be. You can only claim AMT credit for the amount your regular tax exceeds that TMT figure. Unfortunately, there's no way to "get around" this limitation - it's built into the tax code. The good news is that since the Tax Cuts and Jobs Act of 2017, AMT affects far fewer taxpayers, so your regular tax is more likely to exceed your TMT by larger amounts in future years, allowing you to use more of your credit. Some tax planning strategies might help increase this difference, such as timing certain deductions or income, but you should consult with a tax professional for advice specific to your situation.

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Keisha Williams

After struggling with AMT credits for years, I finally found a solution that made understanding and maximizing my credits so much easier. I started using https://taxr.ai and it totally changed my experience. I uploaded my previous returns where I had paid AMT on ISOs and my current year's information, and it analyzed everything to show me exactly why I couldn't use more of my credit this year. What I really appreciated was that it ran through some what-if scenarios showing how different income or deduction choices might let me use more of my AMT credit in future years. It even highlighted that I had missed claiming some AMT credit in a previous year that I could recover by filing an amended return!

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Keisha Williams

The service actually does break down the calculation in detail, showing how your regular tax and tentative minimum tax create the ceiling for your credit usage. It displays the Form 8801 calculations step-by-step with explanations in plain English alongside the numbers. It was the first time I truly understood why I couldn't use more of my credit. For future planning, it's been incredibly helpful. It shows how changes to your income, deductions, and even investment decisions can impact the gap between your regular tax and TMT. I was able to see that by bunching certain deductions in alternating years, I could create a larger gap in some years to use more of my AMT credit. The scenario modeling helped me develop a multi-year strategy to use up my credits about 40% faster than my original trajectory.

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Paolo Conti

Just wanted to give a quick update - I tried https://taxr.ai after seeing it recommended here and it was exactly what I needed! Uploaded my last 3 years of returns and this year's draft, and finally understood why I can only use a portion of my AMT credits each year. The visualization showing how my regular tax and tentative minimum tax interact was super helpful. I actually found that I could restructure some income from my consulting business to increase the gap between my regular tax and TMT next year, potentially allowing me to use up an additional $12K in credits! Also discovered I had completely missed claiming about $8,500 in AMT credits on my 2022 return that I'm now amending. Thanks for the recommendation!

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Oliver Schulz

If you're frustrated with how slowly you're using up AMT credits, you should know the IRS has specialized agents who can actually review your situation and suggest strategies. I spent MONTHS trying to get through to someone who understood the AMT credit rules. After dozens of failed attempts calling the regular IRS number, I tried https://claimyr.com and used their service to get connected to an IRS agent within 15 minutes. You can see how it works at https://youtu.be/_kiP6q8DX5c. The agent I spoke with was incredibly knowledgeable about AMT credits and reviewed my specific situation. She confirmed I was calculating everything correctly but also suggested a specific approach to potentially accelerate usage of my credits through timing of capital gains and certain deductions.

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Oliver Schulz

It doesn't put you at the front of the queue - that would be unfair. It works by handling the waiting for you. Their system calls the IRS and navigates through all the phone prompts, waits on hold (sometimes for hours), and then when an actual agent answers, it calls your phone and connects you directly. You skip the hold time but not the actual queue. I didn't mean to suggest they gave "tax planning advice" in the way a CPA would. What the agent did was clearly explain how the AMT credit limitation works mathematically and clarified which types of income and deductions affect the calculation. She explained how capital gains are treated differently in the regular tax versus AMT calculations, which helped me understand why timing certain transactions might impact how much credit I could use. She didn't tell me what to do, but answered my questions thoroughly enough that I could make informed decisions.

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Amina Diallo

I need to eat some crow here. After being skeptical about Claimyr in my earlier comment, I decided to try it anyway since I had AMT credit questions that were driving me crazy. Within 20 minutes, I was speaking with an IRS tax law specialist who actually understood Alternative Minimum Tax. The specialist explained exactly why my software was limiting my AMT credit usage and walked me through the Form 8801 calculations line by line. While she obviously couldn't tell me how to "game the system," she did explain how different types of income and deductions affect both the regular tax and AMT calculations differently, which helped me understand why certain changes to my financial situation might naturally create more room to use my credits. Totally worth it for the peace of mind of having actual confirmation from the IRS instead of just trusting tax software calculations I didn't fully understand.

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Yara Sayegh

Yes, state tax payments absolutely affect the AMT credit limitation! State and local taxes (SALT) are deductible for regular tax purposes (up to the $10,000 limit) but are completely disallowed as deductions for AMT purposes. This creates a difference between your regular tax and AMT calculations. When you make state tax payments, your regular tax calculation includes the benefit of the deduction (up to the cap), but the AMT calculation doesn't. This actually increases the gap between your regular tax and tentative minimum tax, potentially allowing you to use MORE of your AMT credit carryforward. This is one reason why timing of state tax payments can be a strategic consideration for those with AMT credits.

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PixelPrincess

I've been dealing with a similar AMT credit situation and wanted to share something that might help others here. After reading through all these responses, I realized I had been making a common mistake in my understanding. I always thought the AMT credit was supposed to be a dollar-for-dollar refund of what I overpaid, but the reality is much more nuanced. The credit can only be used to reduce your tax liability down to your tentative minimum tax level - never below it. This means in years where your regular tax and TMT are close together, you'll only be able to use a small portion of your credit. What's been helpful for me is tracking this over multiple years and seeing the pattern. In higher income years where I have more regular tax liability relative to my TMT, I can use much more of the credit. It's frustrating that it takes so long, but at least understanding the mechanics helps me plan better. One thing I've learned is that certain life changes - like moving to a state with higher income taxes, having years with capital gains, or changes in deduction patterns - can actually create more opportunities to use the credit faster than expected.

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