LIFO Recapture Tax: Calculation, Installments, and Filing

The LIFO recapture tax is the federal income tax a C corporation owes on its accumulated LIFO reserve when it elects S corporation status. The reserve — the difference between inventory valued under FIFO and inventory valued under LIFO — is included in gross income on the corporation’s final C corporation return, and the resulting increase in tax is payable in four equal annual installments with no interest if each is paid on time.¹

What the Recapture Amount Is

LIFO deducts the cost of the most recently purchased inventory first. When prices rise, that produces a higher cost of goods sold and lower taxable income than FIFO, which deducts oldest costs first. Over years of inflation, the gap between what the inventory would be worth under FIFO and what it is carried at under LIFO grows. That gap is the LIFO reserve, and it represents income the corporation has effectively deferred.

The recapture amount equals inventory under FIFO minus inventory under LIFO, measured at the close of the corporation’s last tax year as a C corporation. If FIFO inventory is $5 million and LIFO inventory is $3.8 million, the recapture amount is $1.2 million. That figure is added to gross income on the final Form 1120.¹

A corporation that has not kept parallel FIFO records will need to reconstruct them, rolling back LIFO layers and repricing them at original acquisition costs. For a company with decades of LIFO history, this is not a quick exercise, and it should be started well before the election year closes.

When Recapture Applies

Section 1363(d) targets one situation: a C corporation using LIFO becomes an S corporation. Recapture also applies when a C corporation using LIFO transfers its inventory to an S corporation in a nonrecognition transaction, such as a Section 332 liquidation or a qualified subchapter S subsidiary (QSub) election. In those cases the transferee S corporation picks up the remaining installment payments.² The IRS treats a QSub election as a deemed liquidation of the subsidiary into the S parent, which is why it triggers the rule.³

A C corporation that simply switches from LIFO to FIFO without changing its status is not in Section 1363(d) territory. That change is governed by Section 481(a), spreads the income adjustment itself over four years rather than deferring tax on a one-year inclusion, and requires Form 3115.⁴ If that is your situation, the rest of this article does not apply to you.

Calculating the Tax

The recapture amount is taxed as ordinary income at the flat 21% federal corporate rate, folded into the final C corporation return along with regular operating income. There is no separate rate. Consider a C corporation with $800,000 of regular taxable income and a $600,000 recapture amount:

Regular taxable income: $800,000
LIFO recapture amount: $600,000
Total taxable income: $1,400,000
Federal tax at 21%: $294,000
Tax without recapture: $168,000
Tax increase attributable to recapture: $126,000

Only the $126,000 attributable to recapture qualifies for installment treatment. The $168,000 on regular income is due normally with the final return.

The recapture income interacts with other tax attributes. Unused net operating losses can absorb some or all of it, reducing the cash tax. Run the calculation in the context of the full return rather than in isolation.

The Four-Year Installment Schedule

The tax increase from the recapture is paid in four equal installments of 25% each.¹ The first is due by the filing deadline of the corporation’s final C corporation return, without extensions. The remaining three are due by the filing deadlines of the next three tax years, also without extensions.

On the $126,000 figure above, the schedule is four payments of $31,500. The first goes in with the final Form 1120; the next three go in with the S corporation’s returns over the following three years.

The statute treats each installment’s prescribed payment date as its own due date for purposes of calculating interest on underpayments. As long as each installment is paid on time, no interest accrues on the deferred amounts.¹ This is an interest-free deferral, which is unusual.

Where inventory was moved to an S corporation through a nonrecognition transaction rather than a direct S election by the corporation holding the LIFO inventory, the transferee S corporation is on the hook for the second through fourth installments.²

How to Report It

The recapture amount is included in gross income on the corporation’s final Form 1120 for its last year as a C corporation. Attach a statement showing the recapture amount, how it was calculated, and the four-installment payment schedule. There is no dedicated form for the recapture itself; it flows into the return as additional ordinary income.

The S election is made separately on Form 2553. Form 3115 is not required for recapture triggered by an S election, because this is not a voluntary accounting method change — it is a mandatory income inclusion imposed by statute.

Adjusting Inventory Basis

Once you have paid tax on the recapture amount, the inventory basis has to be stepped up by the same amount, or you will pay tax on the same income twice when the inventory is sold. The statute requires this adjustment, and it is easy to miss.¹

Mechanically, the existing LIFO layers are collapsed into a single layer, and the recapture amount is added to the LIFO carrying value. If inventory had a LIFO value of $3.8 million and recapture was $1.2 million, the new basis is $5 million, the FIFO figure. The S corporation uses that adjusted basis for cost of goods sold going forward, so income already taxed through recapture is not taxed again on sale.²

The step-up happens whether or not the recapture actually produced additional tax. Even if net operating losses fully absorbed the recapture income, the inventory basis still adjusts. Skipping this step quietly inflates taxable income for every future period until the inventory turns over.

State Tax

Most states with a corporate income tax follow the federal treatment and include the recapture amount in state taxable income. Top marginal state corporate rates run from roughly 2% to nearly 12%, so the state layer can be material.

What most states do not follow is the four-year installment schedule. In those states, the full state tax on the recapture is due in the year of recognition, which is the final C corporation year. If you are planning a conversion, confirm your state’s rule before you set the timing, because the state liability may need to be funded entirely from that first year’s cash even though the federal payments are spread across four.

1
Office of the Law Revision Counsel. 26 U.S. Code 1363 – Effect of Election on Corporation
2
eCFR. 26 CFR 1.1363-2 – Recapture of LIFO Benefits
3
Internal Revenue Service. Reporting and Payment of LIFO Recapture
4
Office of the Law Revision Counsel. 26 USC 481 – Adjustments Required by Changes in Method of Accounting