The Five-Year Vesting Cliff: What Triggers ITC Recapture, and Who Ends Up Paying
In September 2024, Enterprise Financial Services Corp bought roughly $32.4m of solar investment tax credits from Sunnova Energy. In June 2025, Sunnova filed for Chapter 11. $24.1m of the credits were recaptured.
Nothing about the panels changed. They were on roofs, generating electricity, working exactly as modelled. What changed was ownership, and under §50(a) an ownership change inside the five-year window is a recapture event regardless of the physical condition of the asset. Reunion, which documented the case, makes the point plainly: recapture followed "regardless of the physical condition of the assets."
That is the thing to understand about recapture. It is not a performance risk. It is a structural one, and it is triggered by events — bankruptcy, foreclosure, a partner selling down, a change of ownership — that have nothing to do with whether the project works.
This post covers what triggers recapture, what conspicuously does not, the partnership trap that catches tax equity deals, who bears the liability after a §6418 transfer, and how to size the exposure.
ℹ️ Note: This describes how these rules work in practice. It is not tax or legal advice — recapture analysis is fact-specific, and the casualty rules in particular sit on contested authority.
What Triggers ITC Recapture?
Disposition or cessation. The credit is recaptured where investment credit property is disposed of, or otherwise ceases to be investment credit property, during the five-year period beginning when it was placed in service.
Both halves matter and they catch different things. Cessation is the one people expect: the asset stops being qualifying property — permanently removed from service, converted to a non-qualifying use. Disposition is the one that causes the losses: the asset, or an interest in the entity that owns it, changes hands.
The Sunnova case is a disposition case. So is a lender foreclosing. So is a tax equity investor selling down. So, in the wrong structure, is a routine corporate reorganisation.
The Schedule: What Vests, and When
Twenty percent a year, on anniversaries of the placed-in-service date.
| Disposition occurs | Recapture percentage | Vested |
|---|---|---|
| Less than 1 year after PIS | 100% | 0% |
| 1 to 2 years | 80% | 20% |
| 2 to 3 years | 60% | 40% |
| 3 to 4 years | 40% | 60% |
| 4 to less than 5 years | 20% | 80% |
| 5 years or more | 0% | 100% |
Two things follow from the shape of that table.
The first year is the dangerous one. A hundred percent of the credit is at risk for twelve months. On a $75m credit, that is a $75m exposure sitting against a project that has only just started operating — which is exactly the period when construction disputes, contractor insolvencies and early-operation problems are most likely.
It is a cliff, not a curve, on each anniversary. A disposition on day 364 recaptures 100%. On day 366 it recaptures 80%. There is no pro-ration within a year. That fifteen million dollar step, on a $75m credit, is why closing dates for asset sales inside the recapture period get negotiated to the day.
The EFSC case shows this in practice. Reunion records the recapture rate as "between 60 percent and 80 percent" across the portfolio, the variation arising purely from the different placed-in-service dates of the 2023 and 2024 projects. Same event, same seller, different anniversaries, different answers.
What Is Not a Recapture Event?
Three carve-outs do real work, and each is narrower than people hope.
Repair and return to service. The IRS administrative practice is that partially damaged property does not trigger recapture if the owner makes the necessary repairs and puts the property back in service. Norton Rose Fulbright notes there is no mandated timeframe — after Hurricane Katrina the National Trust asked for "at least three years, or as long as circumstances warrant," and Treasury never formally responded. That silence is the risk: the practice is real, its boundary is not written down.
Mere change in form. Recapture is not required where the property remains in the business and the taxpayer retains a substantial interest in the trade or business. This is what allows genuine reorganisations to proceed. It does not cover a sale.
Sale-leaseback. As the earlier post in this series described, where ITC property is disposed of and leased back to the vendor, the terms "disposition" and "cessation" do not apply and recapture is not required. This is a deliberate accommodation for a structure Congress intended to work, and it is one of the reasons the leaseback survives.
Note what is absent from that list. Bankruptcy is not on it. Foreclosure is not on it. An involuntary disposition is still a disposition.
The Partnership Trap: The One-Third Rule
This is the trap that catches tax equity, and it has nothing to do with the project.
Where ITC-generating property is held in a partnership, a reduction in a partner's interest in general profits is treated as an indirect disposition of that partner's share of the property. A de minimis exception permits disposal of up to 33⅓% of a proportionate interest without triggering recapture. Beyond that, recapture follows.
The arithmetic is unforgiving because it is measured proportionally, not in percentage points. Take the standard illustration: a partner held 60% of general profits when the ITC was claimed, and that interest falls to 30% during the recapture period. The reduction is thirty percentage points — but it is 50% of the original interest, well beyond the one-third threshold, and recapture is triggered.
Now recall what a partnership flip does. It flips. The tax equity investor's interest in profits goes from 99% to 5%, which is a reduction of about 95% of its original interest.
This is precisely why the flip point is never set inside the five-year window, and why "not before the recapture period ends" is a hard constraint on the flip date rather than a preference. A structure that solves for a flip at year four on yield grounds and does not check it against the recapture clock has produced an answer that cannot be used.
The same rule is why the security structures described in the hybrid post exist. A lender that forecloses on a tax equity investor's interest reduces that interest to zero, and the 99-1 arrangement — where the lender can take the 99% interest without reducing the credit-claiming partner's share past the threshold — is an engineering response to this exact provision.
What About a Casualty?
It depends on whether the property comes back.
The governing distinction is repair versus permanent removal. Partially damaged property that is repaired and returned to service does not trigger recapture. Property that permanently ceases operating does.
Two further points are worth knowing and worth treating with care.
Treasury Regulation §1.47-3(h)(1) appears to allow six months to replace casualty-damaged property without recapture, though Norton Rose Fulbright notes its validity "remains contested following Revenue Ruling 88-96." One analysis suggests recapture does not apply where more than 20 percent of the project remains operational — with the author's own caveat that "the IRS may view this analysis with some skepticism." Neither is something to build a deal on.
There is also a trap in the insurance interaction. Under §1033, a taxpayer has two years from the end of the year of the casualty to reinvest proceeds in similar replacement property and defer gain. That provision, as Norton Rose puts it, "does not address ITC recapture" at all. Property insurance and involuntary conversion relief solve the economic loss; neither solves the tax one. Those are separate policies covering separate risks, and assuming the first covers the second is a common and expensive error.
Who Pays After a Transfer?
The buyer, for the credits it bought — with notification duties running in both directions.
Section 6418 allocates this cleanly. The transferee is responsible for the tax increase on the credits transferred to it. Where the transferor retained part of the credit, it remains liable for a pro rata portion of the recapture on that retained part.
The notification obligations are statutory and mutual. Where the property is disposed of or ceases to be investment credit property before the recapture period closes, the eligible taxpayer must notify the transferee of the event, and the transferee must notify the eligible taxpayer of the recapture amount.
Read that sequence against the Sunnova facts. The seller entering Chapter 11 is the party obliged to notify the buyer that a recapture event has occurred. A seller in bankruptcy is not a reliable compliance counterparty, and a buyer relying on that notice to learn of its own tax liability is relying on the wrong party at the worst moment.
Section 50(c) also applies to transferred credits as though the credit had been allowed to the eligible taxpayer, which means the basis reduction — and its restoration on recapture — stays with the project owner rather than following the credit. The next post takes that mechanism apart.
Why Do PTCs Not Have This Problem?
Because they are earned rather than vested.
A production tax credit accrues on electricity actually generated and sold, year by year, over a ten-year period. There is no single moment at which a large credit is claimed against an asset that then has to survive five years unchanged. Each year's credit is complete when the generation happens.
The consequence for a buyer is that the exposure class described in this post simply does not exist on a PTC. A seller's later bankruptcy does not reach credits generated before it. A foreclosure does not unwind last year's production. The buyer's remaining risk is qualification and compliance — whether the facility was eligible, whether prevailing wage was met — not ownership continuity.
That difference is the substance behind a number the transferability post quoted without fully explaining: PTCs trade roughly 2.5 cents above ITCs in the transfer market. Buyers are not paying a premium for a better credit. They are paying it to avoid a five-year structural exposure that cannot be diligenced away at closing, because the events that cause it have not happened yet.
It also explains a structuring choice that otherwise looks odd. A solar project can elect either credit, and the ITC is usually larger in present value terms. A sponsor selling credits into the transfer market, to a buyer who will price recapture risk into the bid and demand indemnities and insurance on top, may find the PTC nets more — and the comparison should be run net of insurance and indemnity cost, not on the gross credit.
What Does Recapture Actually Cost?
More than the credit, and slightly less than it first appears.
More, because the recaptured amount is an increase in tax for the year of the recapture event, and interest runs on it. The Sunnova claim illustrates the shape: EFSC's insurance recovery covered the $24.1m of recapture plus roughly $8m of additional costs — about a third again on top of the credit itself. Contest costs, professional fees and interest are not rounding.
Slightly less, because of §50(c). The ITC reduced the property's depreciable basis when it was claimed; when the credit is recaptured, that basis reduction is reversed to the extent of the recapture, restoring depreciation deductions going forward.
The offset is real but weak, for two reasons. It is a deduction rather than a credit, so it is worth the tax rate rather than a hundred cents. And it arrives over the remaining MACRS life rather than immediately, while the recapture tax is due now. A model that nets the basis restoration against the recapture at face value will materially understate the loss; discount it, and it typically recovers a low single-digit percentage of the cash hit in present value terms.
Note also where that benefit lands after a transfer. The recapture tax falls on the buyer; the basis restoration falls on the project owner. In a transferred deal the cost and the partial offset sit in different entities entirely, which is one more thing for the purchase agreement to address.
How Much Protection Does an Indemnity Actually Give?
Exactly as much as the indemnitor's balance sheet, which is the lesson the EFSC case teaches most directly.
The seller's indemnity was worth nothing, because the recapture event was the seller's bankruptcy. That is not a coincidence or bad luck — it is structural. The events most likely to trigger recapture on a disposition are events that impair the counterparty giving the indemnity. Credit deterioration causes the trigger and destroys the remedy in a single step.
What worked was insurance. EFSC held tax credit insurance covering recapture, and the insurer paid approximately $32.1m — covering the $24.1m of recapture plus about $8m of additional costs.
Note the size of that payment relative to the loss. $32.1m to cover $24.1m is roughly a third more, and Reunion's account explains why: "after accounting for taxes owed on the insurance proceeds, the insurance was expected to fully offset the economic impact." Insurance proceeds are themselves taxable. A policy sized at the face amount of the exposure leaves the insured short by the tax on its own recovery.
This is the same grossing-up problem the beginning-of-construction evidence post identified from the other direction, and it generalises: size tax indemnity cover on the after-tax recovery, never the gross loss.
How Do You Model Recapture Exposure in Excel?
As an unvested balance that steps down on anniversaries, multiplied by a probability, and tested against whatever is standing behind it.
The inputs
Assumptions, labelled as such:
ITC claimed $75,000,000
Placed in service 1 July 2026
Recapture period ends 1 July 2031
Tax rate on insurance proceeds 21%
Seller tangible net worth $40,000,000
The unvested balance
Year 1 (to 30 Jun 2027) 75,000,000 × 100% = $75,000,000
Year 2 75,000,000 × 80% = $60,000,000
Year 3 75,000,000 × 60% = $45,000,000
Year 4 75,000,000 × 40% = $30,000,000
Year 5 75,000,000 × 20% = $15,000,000
Year 6+ = $0
Build this as a step function on the anniversary date, not a straight-line amortisation. A model that vests the credit evenly across sixty months will understate the year-one exposure by about eight million dollars at the midpoint and will never show the cliff at all — which is the single most important feature of the schedule.
The indemnity adequacy test
Year 1: Exposure $75,000,000 vs Seller net worth $40,000,000
Coverage ratio = 53% → UNCOVERED $35,000,000
Year 3: Exposure $45,000,000 vs Seller net worth $40,000,000
Coverage ratio = 89% → UNCOVERED $5,000,000
Year 4: Exposure $30,000,000 vs Seller net worth $40,000,000
Coverage ratio = 133% → covered
The output that matters is the crossover: on these assumptions the indemnity only becomes credible in year four, and the first three years need something else behind them. This is the same covered-versus-uncovered split the performance guarantee posts used, applied to a tax exposure.
The insurance gross-up
Required policy limit = Exposure ÷ (1 − tax rate)
Year 1: 75,000,000 ÷ 0.79 = $94,936,709
A $75m policy against a $75m year-one exposure leaves roughly $19.9m uncovered once the recovery is taxed. Add contest costs — EFSC's claim included about $8m of them — and the gap widens further.
ℹ️ Note: The grossing-up factor is not a refinement. It is the difference between a policy that works and one that pays out and still leaves a hole, and it applies to seller indemnities written on an after-tax basis too.
The flip-date constraint
Earliest permissible flip = PIS + 5 years = 1 July 2031
Flip date from yield solve = 1 Nov 2030
→ CONSTRAINT BINDS: yield-based flip lands inside the recapture period
Any model that solves for a flip point must publish this test. A flip inside the window reduces the investor's profits interest past the one-third threshold and recaptures the credit the whole structure exists to deliver.
To build the full exposure schedule — unvested balance, indemnity crossover, grossed-up policy limit and the flip-date constraint — prompt Dezzmond with your credit amount and placed-in-service date.
What Do Buyers and Investors Actually Check?
- The placed-in-service date, to the day. The whole schedule keys off it and it steps on anniversaries.
- The seller's credit quality over five years, not at closing. The indemnity has to survive the event that triggers the claim.
- Whether any partner's profits interest can fall by more than a third during the period — including on a flip, a sell-down, or a foreclosure.
- Whether the security package can be enforced without recapture. If not, fix it before closing.
- Whether the policy limit is grossed up for tax on proceeds, and whether contest costs are inside or outside the limit.
- Who is obliged to notify whom, and what happens if the obliged party is insolvent.
- Whether a PTC deal would carry the risk better. PTCs are earned on generation rather than vested over five years, which removes this exposure class entirely.
Frequently Asked Questions
How long does ITC recapture risk last?
Five years from the placed-in-service date. The recapture percentage is 100% in year one and falls twenty points on each anniversary, reaching zero after five years.
Does a project have to fail for recapture to happen?
No. The most common triggers are dispositions — sale, foreclosure, bankruptcy, or a reduction in a partner's interest — and they apply regardless of whether the asset is operating normally.
Can a partner sell down during the recapture period?
Up to one third of its proportionate interest. A reduction of more than 33⅓% of that interest is treated as an indirect disposition and triggers recapture on the excess, which is why partnership flips are set to occur after the five-year period.
Who owes the tax after a credit transfer?
The transferee, for the credits transferred to it, with the transferor liable pro rata for any credit it retained. Both parties carry statutory notification duties when a recapture event occurs.
Do production tax credits carry recapture risk?
No. PTCs are earned on generation year by year rather than vested over five years, so a later ownership change does not reach credits already produced. That is the substance behind the roughly 2.5 cent premium PTCs command in the transfer market.
Does insurance fully cover recapture?
Only if it is sized correctly. Insurance proceeds are taxable, so a policy written at the face amount of the exposure leaves the insured short by the tax on the recovery — which is why the EFSC claim paid about $32.1m against $24.1m of recapture plus costs.
Closing: A Credit You Have Not Finished Earning
The word "recapture" makes this sound like a clawback for doing something wrong. It is better understood as a vesting schedule. The credit is claimed in year one and earned over five, and for most of that time a substantial part of it is still conditional on nothing happening to the ownership of the asset.
What makes it hard to manage is that the conditions are not operational. A project can hit every performance guarantee in the last three posts of Series D and still recapture its credit because a seller filed for bankruptcy, a lender enforced its security, or a partner sold down thirty-five percent of its interest.
That is why the controls are documentary rather than technical: flip dates set outside the window, security structured for enforcement without disposition, indemnities tested against the balance sheet that will exist when the claim arises rather than the one at closing, and insurance grossed up for the tax on its own proceeds. EFSC got the last of those right, and it is the reason a $24.1m recapture on a bankrupt counterparty ended as an administrative problem rather than a loss.
The final post in Series B follows the credit into the depreciation schedule: the basis reduction that applies the moment the ITC is claimed, what restores it when the credit is recaptured, and what the bonus depreciation phase-down does to the value of the shield.
Sources: Reunion — A Real-World Case of Investment Tax Credit Recapture · The Tax Adviser — Recapture Considerations for Inflation Reduction Act Credits · Norton Rose Fulbright — ITC Recapture Following a Casualty Event · Cornell LII — 26 CFR §1.6418-2