Affirm, Klarna, and Buy Now, Pay Later: What Receipt You Actually Need for a Business Purchase

Published: August 23, 2026 · Reading time: 13 min

TL;DR: Splitting a business purchase into Affirm, Klarna, or Afterpay installments feels like it should defer the deduction until the balance is paid off. It doesn't. BNPL plans typically work through a partner bank that pays the merchant in full at checkout, then collects installments from you — the exact structure the IRS addressed for bank credit cards in Rev. Rul. 78-38 and Rev. Rul. 78-39: borrowed money used to pay a vendor is treated as paid on the charge date, not the repayment date. Keep two records: the merchant's itemized receipt (what you bought) and the BNPL provider's loan statement (that the debt existed and what interest you paid). Depreciable-asset basis and placed-in-service date are unaffected by financing. Only the interest portion of an installment is separately deductible, in the year you pay it. A layaway plan is different in kind — no third party lends anything, so the payment-timing shortcut doesn't apply at all.

Checkout screens have gotten good at making a $2,800 camera body feel like a $700 decision: "4 payments of $700, 0% interest, today." For a freelancer buying business equipment, the natural next question is a tax one — do you deduct the whole thing now, or only as each installment clears? The answer turns out to hinge on a 1978 rule written for bank credit cards, and getting it right (or wrong) changes which tax year the deduction lands in.

The Rule That Actually Governs the Timing

Cash-basis taxpayers — most freelancers — generally deduct an expense in the year they pay it. The wrinkle is what counts as "paid" when a third party's money crosses the counter instead of yours.

The IRS settled this for credit cards decades ago, in a pair of rulings issued the same day. Rev. Rul. 78-38 held that a charitable contribution charged to a bank credit card is deductible in the year of the charge, not the year the cardholder pays off the balance. Rev. Rul. 78-39 reached the identical conclusion for a medical expense charged the same way. Both rulings rest on the same reasoning, drawn from Granan v. Commissioner, 55 T.C. 753 (1971): when a deductible payment is made with borrowed money, the deduction is not postponed until the year the loan itself is repaid. Charging a bank card creates an immediate, unconditional debt to the card issuer — a third party who pays the vendor in full right away — and that debt is legally indistinguishable from cash changing hands on the spot.

Neither ruling is written about an ordinary trade-or-business expense by name. But the reasoning they share — a third party advances funds to the vendor, you owe the third party, and that's economically the same as paying cash — is the same reasoning tax practitioners and the Service apply to a routine business purchase charged to a business credit card. It's the logic behind the corpus's own guide to which tax year a receipt belongs to: charge date, not statement-payment date.

Why Buy Now, Pay Later Usually Fits the Same Pattern

A general-purpose bank credit card is the easy case: a bank pays the merchant immediately and you owe the bank. Buy Now, Pay Later checkout financing — Affirm, Klarna, Afterpay, PayPal's Pay in 4 — is structured the same way more often than people assume. These platforms typically don't hold the loan themselves; they originate it through a partner or sponsor bank (Affirm, for instance, has used Cross River Bank and Celtic Bank, among others, to fund its loans) that pays the merchant in full at the moment of purchase. You then owe installments to the BNPL provider under a loan agreement — not to the store, and not on a payment plan the store itself is financing.

That's the same legal shape as the credit-card fact pattern: a third party advances money to the vendor immediately, and you incur an unconditional debt to that third party on the spot. There is no Revenue Ruling with Affirm's or Klarna's name in the caption — the IRS hasn't issued guidance specifically addressing point-of-sale installment lenders — but the mechanics are close enough to the bank-card pattern that the same charge-date timing is the reasonable, defensible position for a cash-basis freelancer to take. What it is not is a guarantee written into the Internal Revenue Code; it's an extension of a well-established principle to a newer product, and it's worth knowing that distinction exists even if it rarely matters in practice.

The Two Records You Actually Need

Because the deductible event is the purchase, not any individual installment, your paper trail needs to prove two separate things:

1. What you bought. The merchant's itemized receipt or order confirmation — vendor, date, item description, and price — satisfies the general recordkeeping duty under IRC §6001 and Treas. Reg. §1.6001-1(a), which requires records "sufficient to establish the amount of gross income, deductions, credits, or other matters." This is the same document you'd need if you'd paid cash.
2. That the debt existed, and what it cost. The BNPL provider's account page or downloadable statement shows the loan amount, the origination date (which should match the purchase date), the payment schedule, and — critically — how much of what you paid was interest versus principal.

Neither one covers for the other. A BNPL statement alone doesn't say what you bought or why it's a business expense; a merchant receipt alone doesn't show whether any of your later payments included deductible interest. And per the same logic covered in our guide to retailer order-history pages, neither the merchant's app nor the BNPL provider's dashboard is obligated to keep your history as long as your own audit exposure lasts — Rev. Proc. 97-22 §3.03 makes clear that using a third party's electronic storage system "does not relieve the taxpayer" of the underlying recordkeeping duty. Download a PDF or screenshot of both records the same week you buy, rather than counting on either app to still have them in three years.

Depreciable Assets Don't Care How You Paid

If the item you financed is a current, fully deductible business expense — software, supplies, a repair — the timing question above is the whole story. But a lot of BNPL purchases are equipment above the $2,500-per-item de minimis safe harbor — the ceiling Treas. Reg. §1.263(a)-1(f)(1)(ii)(D) sets for a taxpayer without an applicable financial statement, raised from its original $500 figure by IRS Notice 2015-82 effective for tax years beginning on or after January 1, 2016, and unchanged since — which means the item has to be capitalized and depreciated rather than expensed outright — unless you elect Section 179 or bonus depreciation to write it off in the year it's placed in service.

Either way, financing doesn't change the numbers that matter:

• Basis is the full purchase price — what the merchant charged, not what you've paid off so far.
• Placed-in-service date is when the asset is ready and available for its intended business use, independent of the loan's origination date or any individual installment date.

A camera bought via a 12-month Affirm loan and a camera bought outright have identical basis and identical placed-in-service dates. The loan is a separate, parallel transaction — how you funded the purchase, not part of what you're depreciating.

Interest: The One Thing That Really Does Follow the Payment Schedule

The purchase price follows the charge-date rule above. The interest on an interest-bearing BNPL plan does not — interest is deductible as it's actually paid, under IRC §163 and reported on Schedule C Line 16b, and only if the loan financed a business purchase. (A 0% "Pay in 4" plan sidesteps this entirely — there's no interest to track.) If the loan runs across a year-end, only the interest paid within each calendar year belongs on that year's return; the rest carries into the following year, the same way any multi-year loan's interest would.

Worked Example: A Camera Body Financed at 9.99% APR

A freelance video editor buys a $2,800 camera body on November 15, 2026, exclusively for client shoots, financing it through a 12-month Affirm loan at 9.99% APR with the first payment due December 15, 2026. She elects Section 179 to expense the full $2,800 basis in 2026 — well under the 2026 Section 179 limit of $2,560,000 (Rev. Proc. 2025-32) — since basis and placed-in-service date are set by the purchase, not the loan.

Amortization schedule for the 12-month, 9.99% APR loan, computed month by month:

(The $246.15 shown for each month is the payment rounded to the cent; the true monthly payment carries an extra fraction of a cent, which is why the total column reads $2,953.82 rather than a simple $246.15 × 12.)

Her records for two returns:

• 2026 Schedule C: $2,800 Section 179 deduction on Line 13 (Form 4562), placed in service November 15, 2026. Plus $23.31 of interest on Line 16b — the single December payment that fell in 2026.
• 2027 Schedule C: $130.51 of interest on Line 16b (the sum of the eleven 2027 payments' interest: $21.45 + $19.58 + $17.70 + $15.80 + $13.88 + $11.94 + $10.00 + $8.03 + $6.05 + $4.05 + $2.03), and nothing else related to this purchase — the $2,800 asset cost was already fully deducted in 2026.

Had she instead used a 0% "Pay in 4" plan — four payments of $700 over six weeks — the Section 179 treatment of the $2,800 basis would be identical, and there would simply be no interest line to track in either year. The financing choice changed her cash flow and her total cost by $153.82; it changed nothing about when or how much of the $2,800 she deducted.

Layaway Is a Different Animal Entirely

It's easy to lump BNPL and old-fashioned layaway together because both spread a purchase into installments — but they work in opposite directions. With BNPL, a third party pays the merchant immediately and you owe the third party; that immediate third-party payment is exactly what makes the charge-date rule apply. With layaway, the retailer holds the item in a back room, doesn't transfer it to you, and doesn't get paid by anyone else on your behalf — you're simply prepaying the retailer directly, in installments, toward a sale that hasn't happened yet.

No third party lends anything. No debt is created on day one. The item isn't yours, isn't in service, and generates no deductible or depreciable event until you finish paying and take possession — at which point ordinary purchase-and-placed-in-service rules apply, dated to that later day. If you're financing a business purchase through a retailer's own in-house layaway program rather than a BNPL lender, don't apply the charge-date shortcut from this article — it doesn't transfer.

Returns: Keep the Timing Symmetrical

If you return a BNPL-financed item, the mechanics follow the same doctrine as any other business refund or return: a same-year return simply nets against the deduction, so the net cost — and the net Section 179 basis, if the item had been capitalized — is what you actually claim. A return that crosses into the following tax year, after you already claimed the deduction, is a recovery you report in the year of the return rather than an amendment to the prior year. Either way, keep the merchant's refund confirmation alongside the original receipt and the BNPL statement — three documents that together show the full life of the purchase: bought, financed, and (if applicable) returned.

Frequently Asked Questions

If I buy business equipment through Affirm or Klarna, is it deductible the year I charge it or the year I finish paying it off?

Generally the year you charge it, not the year you finish paying. Buy Now, Pay Later plans like Affirm, Klarna, and Afterpay usually work through a partner or sponsor bank that pays the merchant in full at the time of purchase, then collects installments from you — the same structure the IRS addressed for bank credit cards in Rev. Rul. 78-38 and Rev. Rul. 78-39. Those rulings hold that using borrowed money to pay a vendor is treated as payment on the date you incur the debt, not the date you repay the lender. A cash-basis freelancer applies that same reasoning to a BNPL-financed business purchase: the deductible event happens on the purchase date, and the remaining installments are simply you repaying a loan, which isn't itself a deductible event.

What receipt do I actually need to keep — the merchant's receipt or the BNPL provider's payment statement?

Both, and they prove different things. The merchant's itemized receipt is what shows the required elements under IRC §6001 and Treas. Reg. §1.6001-1(a) — what you bought, from whom, on what date, and for how much. The BNPL provider's loan or account statement is what proves the debt was actually created that day and shows the interest you paid over time, which you'll need if any of it is deductible. Neither one substitutes for the other, and neither the merchant's app nor the BNPL provider's dashboard is guaranteed to hold the record as long as you might need it — download and save your own copy of both, the same principle that applies to any third-party electronic storage system under Rev. Proc. 97-22 §3.03.

Is the interest I pay on a Buy Now, Pay Later loan deductible?

It can be, but only the interest, and only if the loan financed a business purchase. If a BNPL plan financed a business asset or expense, the interest portion of each installment is deductible as business interest under IRC §163 and Schedule C Line 16b, in the year you actually pay it — a cash-basis taxpayer deducts interest as paid, not as accrued. The principal repayment is never separately deductible; it's just you paying back money you already deducted (or capitalized) on the purchase date. A 0% "Pay in 4" plan has no interest at all, so this question doesn't come up. A longer, interest-bearing plan does, and if the loan straddles two tax years, only the interest paid within each year belongs on that year's return.

Does financing a business purchase through Affirm change its depreciable basis or placed-in-service date?

No. For an asset you have to depreciate rather than currently expense, your depreciable basis is the full purchase price regardless of how you paid for it, and the placed-in-service date is when the asset is ready and available for its intended business use — not the date of the first or last loan payment. Financing doesn't reduce basis and doesn't delay when depreciation (or a Section 179 or bonus-depreciation election) starts. The BNPL loan is a separate, parallel transaction: it's how you funded the purchase, not part of what you're depreciating.

Is a store layaway plan treated the same way as Affirm or Klarna for tax purposes?

No — layaway works the opposite way. With BNPL, a third-party lender pays the merchant immediately and you owe the lender, which is what triggers the borrowed-money rule from Rev. Rul. 78-38 and puts the deductible event on the purchase date. With layaway, there is no third-party lender: the retailer simply holds the item and doesn't transfer it to you, and you're paying the retailer directly in installments toward a sale that hasn't happened yet. No debt is created and no borrowed money changes hands, so the constructive-payment reasoning doesn't apply at all. A layaway item isn't yours, isn't in service, and isn't a deductible or depreciable cost until you finish paying and take possession.

Authoritative References

• 26 U.S.C. §6001 — Notice or regulations requiring records, statements, and special returns
• 26 CFR §1.6001-1 — Records
• 26 CFR §1.263(a)-1 — De minimis safe harbor election
• IRS Notice 2015-82 — De minimis safe harbor limit increased to $2,500
• 26 U.S.C. §163 — Interest
• IRS — Revenue Procedure 97-22: Electronic Storage of Books and Records
• Rev. Proc. 2025-32 — 2026 inflation adjustments, including the Section 179 limit
• IRS Publication 583 — Starting a Business and Keeping Records

Related reading: Which tax year a receipt belongs to on the cash basis · Schedule C Line 16 interest · Itemized receipt vs. credit card slip · Refunds, returns, and rebates on business receipts

One Purchase, Two Records — CentSense Keeps Both

Whether you paid in full or split it four ways, CentSense scans the merchant receipt the moment you buy and lets you attach the BNPL loan statement to the same expense, so both records live together instead of scattered across two apps' retention policies. It tracks the purchase date for the deduction and tags interest payments separately for Line 16b. Free tier includes 10 AI scans per month; Solo is $5/month for unlimited scanning and mileage logging.

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This guide is general education for U.S. freelancers and independent contractors filing for the 2026 tax year. It is not personalized tax advice. Whether a specific Buy Now, Pay Later plan is legally structured like a bank credit card, and how a given purchase should be treated, depends on facts a CPA or EA should review before you file.