US, system was switched on in November 2025 and I filed the 2025 return this spring. I expected the credit to arrive as a refund and instead the software applied a chunk of it and carried the rest to next year, and I had already mentally spent it. My tax liability for the year was smaller than the credit amount. Is that just how this works, and does the carried amount actually survive?
One thing to raise with your preparer specifically. Both of these credits ended for property placed in service after 31 December 2025, so your November install landed inside the window, which is the good news. What that termination means for a carryforward you are still using in later years is exactly the kind of question you want answered by someone who will sign the return, not by a forum. Get it asked before next filing season rather than during it.
I made your mistake with money attached. Signed for a system partly because I treated the credit as a cash payment arriving in spring, then discovered my liability was small because most of my income that year was taxed at low rates. The carryforward is real and I will get there, but it made the first two years of the loan tighter than the salesperson's spreadsheet suggested. If a salesperson shows you a payback chart with the credit as a lump sum in year one, ask them what happens if your liability is small.
Same shape of problem in my house. Credit was several times my liability, so year one used a small slice and the rest went forward. It took three filing years to use up and I stopped thinking of it as money and started thinking of it as a coupon with an unknown expiry.
One thing I did, and you should confirm this with someone who does this for a living rather than taking it from me: I looked at my withholding, because if you are over-withheld all year the credit has less liability to bite into in the way you expect. A preparer will tell you whether that is worth doing in your situation.
Careful with that framing. Withholding does not change your liability, it changes when you pay it. The credit applies against the liability either way. It affects the size of the refund cheque, not how much of the credit you consume.
Correct and better put than mine. Which is exactly why I said ask a preparer rather than a stranger, myself included.
Look at the total tax line, not the refund line. That is the number the credit eats. Everything else is bookkeeping.
Keep the paperwork somewhere you will find it in three years: the invoice, the commissioning date, the model numbers and the return that established the carryforward. When you go to use the last slice of it, the person doing your return will ask for exactly that and you will have moved house twice.
@invoice_ivan · 2mo ago · 3 replies
That is the expected behaviour and it catches a lot of people. The residential clean energy credit is nonrefundable, which in plain terms means it can reduce the tax you owe to zero but it cannot pay you money you never owed. The IRS page for it is explicit that you can carry forward any excess unused credit and apply it against tax you owe in future years.
So the number you should have been looking at when you were doing the back of the envelope was your total tax liability for the year, not the refund you normally receive. I am not your accountant and if the carryforward is a big number it is worth an hour with a preparer, but nothing about what your software did sounds wrong.
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@boring_portfolio · 2mo ago
Worth adding the distinction that trips up half the people asking this, because there are two different credits and they behave differently. The residential clean energy credit, the solar and battery one, is nonrefundable but carries forward. The energy efficient home improvement credit, the one for heat pumps, insulation and windows, is also nonrefundable but the IRS says explicitly that you cannot apply any excess to future tax years. So heat pump people who assumed they had a carryforward do not have one, and it simply evaporates.
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@budget_bruno · 2mo ago
That distinction is the answer I actually needed. Ours is solar, so it carries. Good grief.
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