Form 1125-A: Cost of Goods Sold
Used by corporations and partnerships to calculate and report the cost of goods sold, which reduces gross receipts on their income tax return.
Overview
IRS Form 1125-A, Cost of Goods Sold, is a supplemental schedule attached to certain business income tax returns that provides a detailed computation of the cost of goods sold (COGS) deduction. Businesses that sell physical products must calculate COGS — the direct costs attributable to the production or acquisition of the goods they sold during the year — and subtract it from gross receipts to arrive at gross profit. Without this schedule, a filer cannot properly substantiate the COGS deduction claimed on its primary return.
Form 1125-A is required by corporations filing Form 1120 (C corporations) or Form 1120-S (S corporations), as well as partnerships filing Form 1065, whenever those entities maintain inventory or otherwise have a cost of goods sold figure to report. The form operationalizes the inventory accounting rules found in IRC Section 471 and, for certain larger taxpayers, the UNICAP rules under IRC Section 263A, which require capitalization of indirect costs into inventory. Smaller businesses that qualify under the gross receipts test in IRC Section 448(c) may be exempt from Section 263A and can elect certain simplified inventory methods.
The form itself is relatively compact — a single page — but the inputs it requires demand careful reconciliation against the entity's books and records, general ledger accounts, and prior-year return. The ending inventory reported on the form must agree with the balance sheet, and the inventory accounting method elected (FIFO, LIFO, lower of cost or market, etc.) must be disclosed and applied consistently from year to year. A change in inventory method generally requires IRS consent via Form 3115. Most CPA firms treat Form 1125-A as a foundational workpaper reconciliation step before finalizing any business return that involves inventory.
Who Files This Form?
Form 1125-A must be attached to the income tax return of any corporation or partnership that has inventory or a cost of goods sold amount to report. Specifically, this means:
C corporations filing Form 1120 must attach Form 1125-A if they sell goods and maintain inventory. S corporations filing Form 1120-S and partnerships filing Form 1065 face the same requirement. The trigger is the existence of COGS — if the entity's business involves manufacturing, wholesale, retail, or any other trade where goods are purchased or produced for sale, the form is required.
Entities that provide only services generally do not maintain inventory and therefore do not file Form 1125-A. However, hybrid businesses — for example, a contractor that both furnishes labor and sells materials — may need to bifurcate their revenue streams and file the form for the product-sales portion.
A key threshold to understand involves IRC Section 263A (UNICAP). Taxpayers with average annual gross receipts exceeding the Section 448(c) threshold (adjusted for inflation; confirm the current figure in the applicable year's instructions) must apply the UNICAP rules and capitalize additional indirect costs — such as storage, purchasing, and handling — into inventory. Smaller taxpayers below that threshold may be exempt and should check the applicable box on Form 1125-A. Resellers as well as producers can be subject to UNICAP, though the rules differ between them.
Even if an entity's inventory balance is zero at year-end — for instance, because it sold everything it had — it still must complete and attach Form 1125-A to document the calculation that produced the COGS figure carried to the main return. There is no stand-alone filing or separate deadline; Form 1125-A is always filed as part of the parent return, including any valid extension.
Key Fields
Line 1: Inventory at beginning of year
This is the closing inventory balance from the prior year's return and must match exactly. A discrepancy between the prior-year ending inventory and this year's beginning inventory is a common audit flag and typically signals either a book-tax difference that wasn't reconciled or an amended return that wasn't reflected.
Line 2: Purchases
Enter the cost of merchandise or raw materials purchased during the year, reduced by any purchase returns, allowances, and discounts taken. Do not include capital equipment purchases here; this line is strictly for inventory-intended goods. Trade discounts should reduce the purchase price, but cash discounts may be treated as either a reduction in cost or as income, depending on the method consistently used.
Line 3: Cost of labor
Report direct labor costs — wages paid to employees whose work directly produces or transforms inventory. For manufacturers, this includes production-line workers; it generally excludes supervisory or administrative salaries unless those are directly allocable under UNICAP. Service businesses with no inventory will leave this blank.
Line 4: Additional section 263A costs
Taxpayers subject to the UNICAP rules under IRC Section 263A must include here the additional indirect costs required to be capitalized into inventory — items such as warehouse costs, purchasing department overhead, and certain mixed-service costs. Taxpayers exempt from Section 263A should enter zero and check the exemption box in Part II. Incorrectly omitting 263A costs is one of the most frequently examined items for mid-size manufacturers.
Line 5: Other costs
Capture any other inventoriable costs not listed above — for example, freight-in, packaging materials integral to the product, or other direct production overhead. Keep a detailed workpaper supporting this line because examiners routinely request backup for catch-all cost lines.
Line 6: Total (Lines 1 through 5)
This is the sum of all costs available for sale during the year (beginning inventory plus all costs added). It represents the maximum possible COGS before adjusting for ending inventory. Review this figure against gross receipts as a reasonableness check — a COGS-to-revenue ratio far outside the industry norm may warrant further investigation before filing.
Line 7: Inventory at end of year
Enter the value of inventory on hand at year-end, determined using the method elected in Part II. This figure must agree with the balance sheet on the entity's return. If a physical count was taken, the workpaper supporting this number should be retained; if the entity uses a perpetual system without a physical count, document that fact.
Line 8: Cost of goods sold (Line 6 minus Line 7)
This is the bottom-line COGS figure that flows to gross receipts on the parent return (e.g., Form 1120, Schedule A, or Form 1065, Schedule A). Verify that this amount ties exactly to the corresponding line on the main return. Any rounding difference, however small, should be resolved before filing.
Part II, Line 9a: Inventory method
The entity must disclose the inventory valuation method used — cost, lower of cost or market, LIFO, or other. The method must be applied consistently year over year; changing it without filing Form 3115 for IRS consent is a significant compliance error. Most CPA firms document the elected method in a permanent workpaper file.
Part II, Line 9f: Section 263A check box
If the entity is not required to capitalize costs under Section 263A (because it qualifies under the small-business gross receipts exemption or otherwise), it checks 'Yes' to this question indicating that Section 263A does not apply. Failing to check this box when eligible, or checking it when ineligible, creates a mismatch that can trigger IRS scrutiny of the entire inventory calculation.
Filing Deadlines
Filed with the entity's income tax return
Filed with the entity return; subject to the same penalties.
Step-by-Step Instructions
- 1
Gather and reconcile source documents: Pull the prior-year return to confirm the opening inventory balance, then collect the general ledger detail for all inventory-related accounts — purchases, direct labor, freight-in, overhead allocations, and any year-end adjusting entries. These workpapers are the foundation of every line on Form 1125-A.
- 2
Determine whether Section 263A applies: Check whether the entity's average annual gross receipts for the three preceding tax years exceed the current Section 448(c) inflation-adjusted threshold. If the entity is subject to UNICAP, prepare a separate 263A cost allocation workpaper before populating Line 4. If exempt, document the exemption and confirm the correct box is checked in Part II.
- 3
Confirm the inventory valuation method and verify consistency: Review the prior-year return for the elected method (cost, lower of cost or market, LIFO, etc.). If the entity wants to change its method, file Form 3115 concurrently. Do not simply switch methods on the current-year Form 1125-A without IRS consent.
- 4
Complete Lines 1 through 5 using reconciled ledger data: Enter beginning inventory on Line 1, net purchases on Line 2 (reduced by returns, allowances, and discounts), direct labor on Line 3, Section 263A additions (if applicable) on Line 4, and all other inventoriable costs on Line 5. Each line should trace directly to a supporting workpaper.
- 5
Enter ending inventory on Line 7: Confirm the year-end inventory valuation against the physical count records, perpetual inventory system report, or lower-of-cost-or-market analysis as appropriate. Ensure this figure agrees with what will appear on the entity's balance sheet.
- 6
Calculate cost of goods sold on Line 8: Subtract Line 7 from Line 6. Cross-reference this result to the COGS line on the primary return (Form 1120 Schedule A, Form 1120-S Schedule A, or Form 1065 Schedule A) to confirm exact agreement before finalizing.
- 7
Complete Part II disclosures: Answer all questions in Part II — inventory method, LIFO election status, write-downs, Section 263A applicability, and any other required disclosures. These checkboxes are frequently overlooked but are substantively important and reviewed during examination.
- 8
Attach Form 1125-A to the entity's return: The form has no standalone filing; it is always submitted as an attachment to Form 1120, 1120-S, or 1065. Confirm the entity name and EIN at the top of Form 1125-A match the parent return exactly. File by the due date of the entity return, including extensions.
Common Mistakes to Avoid
Opening inventory does not match the prior year's closing inventory.
Always tie Line 1 directly to the ending inventory on the prior-year return before doing anything else. If there is a legitimate difference (e.g., a cost method change or an amended return), document it with a written explanation and consider whether a disclosure statement is needed.
Failing to apply or document Section 263A capitalization when required.
Determine UNICAP applicability before completing the form, not after. Taxpayers above the gross receipts threshold must calculate and include 263A costs on Line 4; omitting them understates inventory and overstates COGS, which can result in accuracy-related penalties under IRC Section 6662.
Changing inventory valuation methods without IRS consent via Form 3115.
A change in accounting method — including a change from cost to lower of cost or market, or from FIFO to LIFO — requires advance IRS consent. File Form 3115 with the return (or in advance, depending on the method change) and include the required Section 481(a) adjustment.
Ending inventory on Line 7 does not agree with the balance sheet.
Before filing, reconcile the Form 1125-A ending inventory to the entity's Schedule L balance sheet. A discrepancy is an automatic audit flag. If book and tax inventory differ due to a book-tax adjustment, document it clearly in the workpaper file.
Including non-inventoriable costs — such as selling expenses or depreciation on office equipment — in Lines 4 or 5.
Only costs that are directly related to the production or acquisition of inventory belong on Form 1125-A. Period costs (selling, general, and administrative expenses) are deducted elsewhere on the return. Misclassifying period costs as COGS inflates the deduction and distorts gross margin.
Leaving Part II incomplete or checking boxes without analysis.
Every question in Part II requires an affirmative answer based on facts, not a reflexive checkbox. In particular, the Section 263A applicability question and the inventory write-down disclosure should be reviewed each year with fresh analysis, not carried forward automatically from the prior year.
Frequently Asked Questions
Any corporation (C corp or S corp) or partnership that has inventory or a cost of goods sold amount must attach Form 1125-A to its income tax return. This applies to businesses that manufacture, buy, or sell physical goods. Pure service businesses with no inventory are generally not required to file this form.
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