IRC Section 472: LIFO Election, Conformity, and Recapture

IRC Section 472 lets a business use the last-in, first-out (LIFO) method to value inventory for federal income tax purposes. Under LIFO, the most recently acquired goods are treated as sold first, so older and typically lower costs stay on the balance sheet. When prices are rising, that pushes higher current costs against current revenue and lowers taxable income. The trade-off is that the election is permanent without IRS consent to change, it forces the same method onto your financial statements, and leaving it later — or converting to an S-corporation — has its own tax cost built in.

How LIFO Values Your Inventory

Section 472(b) sets three rules for pricing closing inventory. Goods still on hand at year-end are treated as coming from opening inventory in the order they were originally acquired, before any current-year purchases are counted. All inventory covered by the election must be carried at cost, with no write-downs to market. And in the first year of the election, the opening inventory is priced at the average cost of all units on hand at that time.¹

The cost-only rule is where companies trip. A business that has been using lower-of-cost-or-market has to restore inventory values to actual cost before it adopts LIFO. The IRS can terminate the election if the taxpayer did not properly restate inventory to cost for the year preceding adoption.¹

That first-year average-cost pool becomes your permanent base layer. It stays on the books at that value until those specific quantities are actually sold. Each later year’s unsold additions form a new layer at that year’s cost, so a LIFO inventory builds up as a stack, oldest costs at the bottom. The running gap between FIFO value and LIFO value is the LIFO reserve.

Making the Election

You elect LIFO by filing Form 970, Application to Use LIFO Inventory Method, with your timely filed federal income tax return (including extensions) for the first year you want the method to apply.² No advance IRS approval is needed. Once filed, the election is permanent, and you cannot switch methods without the IRS’s express consent.¹

Form 970 asks you to identify which goods or product categories the election covers. You can elect LIFO for all inventory or limit it to particular raw materials or finished goods. You also pick a calculation approach: the specific-goods (unit) method, which tracks physical quantities and their individual costs, or the dollar-value method, which groups items into pools by monetary value.²

Dollar-value filers must describe their pools and how they will compute price indexes. Available index approaches include double-extension, link-chain, and the Inventory Price Index Computation (IPIC) method, which lets you use published Bureau of Labor Statistics indexes instead of building your own.³ The IRS also expects you to keep supplemental inventory records detailed enough for an examiner to verify both the LIFO computations and compliance with Section 472.⁴

The Conformity Requirement

LIFO is the only inventory method that comes with a financial-reporting string attached. Under Section 472(c), you cannot use LIFO for tax purposes unless you also use LIFO when reporting income to shareholders, partners, other owners, or beneficiaries, and on any financial statement issued for credit purposes, such as reports submitted to a lender.¹ Section 472(e) extends that obligation into every future year. If the IRS discovers you reported income to investors or creditors on a different method, it can revoke the election and force a switch, typically producing back taxes and penalties for prior-year understated income.⁵

What You Can Still Show on a Non-LIFO Basis

Treasury Regulation 1.472-2(e) does carve out room for supplemental non-LIFO information. The dividing line is where it appears: footnotes, news releases, letters to shareholders or creditors, and management discussion sections in annual reports can carry non-LIFO figures, but the primary income statement cannot. Balance-sheet valuation on a non-LIFO basis is permitted as long as you do not disclose non-LIFO earnings. Internal management reports may use non-LIFO data if they are never shared with equity holders. Interim reports covering a continuous period shorter than a full year can be issued on a non-LIFO basis. And valuing inventory at the lower of LIFO cost or market for book purposes does not break conformity.⁶

The Three-Year Spread for Beginning Inventory Adjustments

Restating opening inventory to cost usually increases its dollar value, which would otherwise land as taxable income in the year of the switch. Section 472(d) softens that by requiring any increase to be spread ratably over three taxable years, starting with the first year the method applies.¹ If the restatement adds $90,000 to opening inventory, $30,000 hits income each year for three years rather than all at once.

LIFO Liquidation Risk

A LIFO liquidation happens when you sell more inventory than you replace and start dipping into the older, lower-cost layers built up in earlier years. Those old costs get matched against current revenue, and the artificially wide margin inflates taxable income. Prior years’ tax savings effectively reverse, sometimes sharply in a single period.

This is the ongoing exposure of the election. A company that built LIFO layers during high-inventory years and then hits a downturn, a supply disruption, or a deliberate draw-down can end up reporting large paper profits without generating extra cash. If the entire LIFO base is liquidated, the business winds up roughly where it would have been without LIFO in the first place, assuming rates held steady. If rates went up in the meantime, it is worse off.

Discontinuing LIFO

Voluntarily leaving LIFO requires filing Form 3115, Application for Change in Accounting Method. Most taxpayers qualify for the automatic consent procedures using Designated Change Number 56, which covers changes away from LIFO for an entire inventory or for one or more dollar-value pools. Under the automatic route, the form is attached to the timely filed return for the year of change, with a duplicate copy sent to the IRS National Office. Taxpayers who do not meet the automatic eligibility rules must request a private letter ruling through the non-automatic process, which involves a user fee.⁷

The Section 481(a) Adjustment

Switching off LIFO reverses the accumulated LIFO reserve. That reversal is a Section 481(a) adjustment — the cumulative income difference produced by the method change. A positive adjustment, which is the usual result of leaving LIFO during inflationary periods, increases taxable income. The IRS generally requires a net positive Section 481(a) adjustment to be spread over four taxable years starting with the year of change, rather than absorbed all at once.⁸ For a company with a large reserve, even the four-year spread can produce a meaningful annual tax bill, so modeling the numbers before filing is essential.

Five-Year Lockout Before Re-Electing

After voluntarily discontinuing LIFO, you cannot re-elect the method for at least five taxable years from the year of change. The only opening is if the Commissioner grants early re-election based on unusual and compelling circumstances.⁹ That lockout makes the exit decision one to plan well ahead.

LIFO Recapture on Converting to an S-Corporation

A C-corporation that uses LIFO and then elects S-corporation status faces an added tax under Section 1363(d). The corporation must include its LIFO recapture amount — the excess of the inventory’s FIFO value over its LIFO value — in gross income for its last C-corporation taxable year.¹⁰

The resulting tax increase is payable in four equal installments. The first is due with the C-corporation’s final return by the unextended due date, and the remaining three are due with the returns for the next three taxable years. Once the S election takes effect, the S-corporation is responsible for the remaining payments.¹⁰

The same recapture rules apply when a C-corporation transfers LIFO inventory to an S-corporation in a tax-free reorganization or similar nonrecognition transaction. The recapture amount is included in the transferor’s income for the year of transfer, the transferee S-corporation picks up the remaining installments, and the inventory basis is adjusted upward to reflect the amount included in income, so the same recapture is not taxed again when the goods are eventually sold.¹⁰

1
Office of the Law Revision Counsel. 26 USC 472 – Last-in, First-out Inventories
2
Internal Revenue Service. Form 970 – Application To Use LIFO Inventory Method
3
eCFR. 26 CFR 1.472-8 – Dollar-value Method of Pricing LIFO Inventories
4
GovInfo. 26 CFR 1.472-3 – Time and Manner of Making Election
5
eCFR. 26 CFR 1.472-2 – Requirements Incident to Adoption and Use of LIFO Inventory Method
6
Internal Revenue Service. Practice Unit – LIFO Conformity
7
Internal Revenue Service. Instructions for Form 3115
8
Internal Revenue Service. 4.11.6 Changes in Accounting Methods
9
Internal Revenue Service. Revenue Procedure 2025-23
10
eCFR. 26 CFR 1.1363-2 – Recapture of LIFO Benefits