Invoiced in December, Paid in January: Which Tax Year?

Invoiced in December, paid in January: which year is the income?

The accounting method decides the year, not the invoice date and not the date on a Form 1099. A business on the cash method reports income in the year it receives the money, or the money is made available to it. A business on the accrual method reports income in the year its right to payment is fixed and the amount can be determined with reasonable accuracy (Publication 538). Most sole proprietors with no inventory use the cash method (Publication 334). On that method, a payment that reaches you in January is next year's income, except a check already in your hands by December 31. Check the method box on your return before relying on this. The dates below assume a calendar tax year; a fiscal-year business uses its own year end.

A case is not simple when:

• the books and the return use different methods;
• income was put in the wrong year on several returns, not one;
• a Form 1099 shows a different amount or year than the return, or an IRS notice arrived;
• the business is a C corporation, or a partnership with a C corporation as a partner, that may have been required to use accrual;
• customers pay deposits or in advance.

Gather the method shown on the last return, every invoice and payment from November through January with three dates (sent, money received, money in the bank), and every Form 1099 and payout report for the year.

Cash or accrual: which method am I on, and where do I see it?

The return states the method. Schedule C has a cash, accrual or other box, and each business return asks the same question for the entity.

Most individuals and many sole proprietors with no inventory use cash (Publication 334). A C corporation (a corporation other than an S corporation) and a partnership with a C corporation as a partner generally cannot, unless their average gross receipts for the three prior years, combined with related businesses where the aggregation rules apply, stay at or below $32,000,000 or the corporation is a qualified personal service corporation. Tax shelters and businesses with inventory have their own limits (Publication 538; Rev. Proc. 2025-32). See cash or accrual for a small business.

Publication 334 says to use the same method for taxable income and for the books, but the IRS's own procedure accepts different methods: an eligible business may keep accrual books and file on cash if it reconciles the two and keeps records that support the reconciliation (Rev. Proc. 2015-13, section 2.01(4); 26 CFR 1.446-1). See accrual books and a cash-basis tax return. Changing the method generally needs IRS consent through Form 3115 (Schedule C instructions); see switching from cash to accrual.

On the cash method, when does a payment count as received?

On the cash method, a payment counts in the year you actually or constructively receive it, whatever the invoice date. Constructive receipt means the amount was credited to your account or made available to you without substantial restriction, even if you did not take it (26 CFR 1.451-2; Publication 334).

Neither Publication 334 nor the regulation says when a card sale or payment-app balance counts as received, so a card sale on December 30 that the processor pays out on January 3 has no stated answer. The test is still when the money was credited or made available to you without substantial limits. Publication 334 also treats income as received when an agent receives it for you. These sources do not settle whether a processor or marketplace holding your funds is your agent; that depends on the facts and the terms you agreed to. Keep the payout report, and take a payout that straddles year end to a CPA.

Can I hold a check or delay billing to move income into next year?

Holding a payment that is already available does not move it to next year; the sources do not say when an invoice must be sent. A cash-method business cannot hold checks or postpone taking possession of payment to move income into the next year (Publication 334). The publication's example is a contractor told in December that a payment was ready, who asked to be paid in January: the payment is still December income.

Money is not yet received while your access to it is subject to substantial limits or restrictions (26 CFR 1.451-2).

A method must clearly reflect income, and the IRS may compute income another way if it does not (26 CFR 1.446-1). Whether a pattern of year-end invoice timing clearly reflects income is a question of facts for a CPA.

On the accrual method, does the invoice date or the payment date decide?

Neither the invoice date nor the payment date decides by itself. An accrual-method business includes income in the year all the events that fix its right to the payment have occurred and the amount can be determined with reasonable accuracy (26 CFR 1.446-1; Publication 334). Publication 334's example: a sale made December 28, billed the first week of January and paid in February is income of the year of the sale.

For services, income is generally reported in the year earned, which can come before a project ends. If the right to payment or its amount cannot be determined until the services are completed, the year of completion is ordinarily the year (26 CFR 1.451-1). A contract can move the date: milestones, a customer approval step, or payment that depends on a result can mean the right is not yet fixed on December 31. That is a question of facts and contract terms; the sources give the test, not a list of terms. An accrual business with an applicable financial statement (AFS), such as an audited statement used for credit or for reporting to owners, or one filed with the SEC or another federal agency, must include income no later than when it is taken into account as revenue there. The tax rule adjusts that revenue first: by default it leaves out an amount the business could not enforceably recover if the customer ended the contract on the last day of the year, and an elected alternative method changes the adjustments, so contingent contracts need review (Publication 538; 26 CFR 1.451-3).

What if the client paid a deposit or paid in advance?

A payment received before the work counts when it is received on the cash method, because the method counts every amount actually or constructively received in the year (Publication 334). An accrual-method business generally also reports an advance payment when it receives it, with a limited deferral election for some payments (Publication 538). See customer prepayments and deposits for the rules and for refundable deposits, whose treatment depends on their terms.

My Form 1099 shows a different amount or year than my return: what do I do?

The return follows the method, not the form, but a mismatch needs an explanation. A client with no Form 1099 can still have paid you income. Form 1099-NEC generally covers service payments of $2,000 or more in the year; backup withholding can require one at any amount; payments to a corporation are generally reported only in narrow cases, such as attorneys' fees; and card or payment-app payments go on Form 1099-K instead (instructions). The return counts all business receipts, form or not. The Schedule C instructions say line 1 must include the amounts properly shown on Forms 1099-NEC, and if the nonemployee compensation on those forms totals more than line 1, attach a statement explaining the difference. That instruction is for Schedule C filers; a partnership or corporation should keep the same reconciliation in its file.

A Form 1099-NEC reflects payments the payer made during its calendar year (instructions), and the payer generally files it and sends your copy by January 31 after the payment year, or the next business day when that date falls on a weekend or legal holiday. A payment made in January is on the next year's form. Two things then open a gap:

• Cash method: the payer may count a check in the year it was sent, and you count it in the year it reached you.
• Accrual method: a December invoice paid in January is on the next year's form but was income the year before, so line 1 can be lower than the form in the payment year.

A Form 1099-K reports payments made in settlement during the calendar year, and a payment is made when the platform submits the instruction to transfer the funds (instructions). That year can also differ from the year you have income, and the amount is gross of fees and refunds.

Keep the dates that explain each gap. Publication 334 says the IRS may use Forms 1099 and other reports payers send it to select returns for examination. Only the issuer can correct a form. For two forms covering the same money, see one payment on two tax forms; for payouts that do not match sales, see reconciling sales and payouts.

Which date do I record in my books so the year-end numbers match the return?

Record each payment on the date the money was received, not the invoice date, and keep one list of open invoices at December 31.

1. List every invoice sent or work finished by December 31 and not yet paid: customer, invoice date, date the work was finished, amount.
2. Record each payment on the date the money was received or credited. When the date a check was in hand differs from the deposit date, record both.
3. On the cash method, the open list is not income; each item becomes income when received. On the accrual method, each item is income in the year the right was fixed and sits in receivables (money customers owe you) until paid. Accounting software often records income when an invoice is sent; if your return is on the cash method, run the income report on its cash basis and use the open-invoice list for what customers owe. See accrual books and a cash-basis tax return.
4. Tie the totals: income in the books to the gross receipts line on the return, then to the Forms 1099. Write one line for each difference, such as an open invoice, a check date, a platform fee or a refund.
5. Keep the list with the filed return.

The year-end close checklist covers the rest of the cutoff. An invoice that is never paid is a different question: see writing off unpaid customer invoices.

Which records prove the date?

Keep the bank or payout record for when money arrived, the invoice for when you billed, and, for a check, a dated note of the day it reached you. Publication 583 lists invoices, bank deposit slips, credit card charge slips and Forms 1099-MISC and 1099-NEC among the documents that support gross receipts.

Keep them as long as the return can be examined or amended; see how long to keep business records.

What if I put income in the wrong year on a return I already filed?

A slip between two years can affect both returns. The year that missed the income may owe more tax, with interest on tax not paid by the due date; the year that counted it too early may have overpaid. On an individual return, file a separate Form 1040-X for each year, and check the state return too (Instructions for Form 1040-X). A refund claim on Form 1040-X generally must be filed within 3 years after the original return was filed or 2 years after the tax was paid, whichever is later. A return filed before the due date generally counts as filed on the due date. The refund is also limited to tax paid within a lookback period before the claim, so check when the earlier year's tax was paid (Form 1040-X instructions; 26 U.S.C. 6511(b)(2)).

A repeated pattern is different. The regulations treat the proper time to include an item in income as a "material item," and a change in how it is treated is a change in method of accounting that generally needs IRS consent, not just an amended return (26 CFR 1.446-1; Publication 538). The same regulation says correcting a posting error is not a method change, and that a method is generally not established for an item without consistent treatment. The regulation gives no number of returns, but the IRS's procedure for method changes treats the same handling of an item on two or more consecutively filed returns as consistent treatment (Rev. Proc. 2015-13, section 2.01(2)). Where one misplaced invoice ends and a method begins still turns on the facts.

For an individual's return, see amending for income left off past returns. For a partnership or S corporation whose K-1s already went out, see correcting a filed business return.

Example

These examples are illustrative; amounts are in US dollars.

Cash method: a check in December, a transfer in January

A freelance designer on the cash method sends an $8,000 invoice on December 15. If the client's check is in her hands on December 30 and she deposits it January 3, the $8,000 is income for the year of the check. If the client instead pays by bank transfer on January 4, the $8,000 is next year's income. The invoice date does not change the year in either case.

Accrual method: work finished in December

A consultant on the accrual method finishes a project on December 20, invoices $8,000 and is paid in February. Nothing in the contract makes the payment depend on a customer approval or a result, so the right to payment was fixed and the amount known in December, so the $8,000 is income for the year the work was finished and sits in receivables at year end. The February payment is not income a second time.

A Form 1099-NEC higher than the books

A consultant on the cash method has a client's Form 1099-NEC showing $30,000 paid, while her books show $22,000. The $8,000 gap is a check the client sent December 29 that reached her January 3. It is next year's income, so line 1 shows $22,000. She attaches the statement the Schedule C instructions ask for, naming the client, the check and the date it arrived, and keeps the deposit record and her note of the arrival date. The next year, her line 1 includes the $8,000 even though that client's next form does not.

Invoice-date income on a cash-method return, three years

A sole proprietor files on the cash method (Schedule C line F says cash) and has no unpaid invoices when year 1 begins. From year 1 she finishes one project each December and invoices it, and the client pays every January. Her books count each invoice when it is sent, and her returns copy the books without a method change. Year 1 has no January payment from an earlier invoice.

Measured against the cash method she filed under, every return is off, by a different amount and in different directions. Fixing one year leaves the others off, and a repeated pattern may be a method change rather than a slip, so the route needs review before anything is amended; see amending for income left off past returns and switching from cash to accrual.

Different for you?

• Income was put in the wrong year on more than one return: the returns may have used a method that needs review, and the books behind each year may need to be checked against the dates before anything is amended. See amending for income left off past returns for a personal return, correcting a filed business return for a partnership or S corporation whose K-1s went out, and get bookkeeping help.
• A Form 1099 does not match a filed return, or an IRS notice arrived: follow the underreporter notice guide or the guide to an IRS notice to your business, and get bookkeeping help to rebuild the dates behind the figures.
• The business may have been required to use accrual (a C corporation or a partnership with a C corporation as a partner above the receipts limit, a business with inventory that is above the receipts limit, or a tax shelter of any size): see switching from cash to accrual, and get bookkeeping help for the books behind past returns.
• You are not sure which method the books or the last return used: see cash or accrual for a small business, and get bookkeeping help to read the last return against the books.
• The books are months behind: see catching up on overdue books and bookkeeping help.
• Customers pay deposits or prepay: see customer prepayments and deposits.
• Card or app payouts land late: see reconciling sales and payouts and the payment platform reporting threshold, and get bookkeeping help to tie each payout to a sale.
• Projects that span tax years under one contract, such as construction: special long-term contract rules can apply; see the Schedule C instructions and ask a CPA.