Crypto tax calendar 2026: every deadline that matters
Crypto has no withholding and no year-end summary you can trust blindly — the dates below are the whole game. When each form arrives, when each payment is due, and the one December date that decides which year a loss belongs to.
The short answer
Five dates do most of the work. February 17, 2026 is when brokers furnish your 1099-DA for 2025 sales (proceeds only). April 15, 2026 is Tax Day — returns, extension requests, and the first 2026 estimated payment all land on it. October 15, 2026 is the final deadline for extended 2025 returns. December 31, 2026 is the last day to realize 2026 losses. And January 1, 2026 is not a deadline at all — it is the day broker basis reporting switched on for covered assets, which is why your forms look different from now on. Working through the season in order? Use the 2026 tax season checklist.
The 2026–2027 calendar
| Date | What happens | What it means for crypto filers |
|---|---|---|
| Thu, Jan 1, 2026 | The 1099-DA basis era begins | Crypto a broker holds from purchase on or after this date is covered: the broker must track and report its cost basis. Everything acquired earlier — and anything transferred in — stays noncovered, proceeds only. |
| Thu, Jan 15, 2026 | Q4 2025 estimated tax due | Last Form 1040-ES payment date for tax year 2025. If 2025 crypto gains left you short of the safe harbors, this is the final top-up before filing. |
| Tue, Feb 17, 2026 | Brokers furnish Form 1099-DA for 2025 sales | Recipient copies are due mid-February; the date slides to the 17th because the 15th is a Sunday and the 16th is the Washington’s Birthday holiday. These first-year forms report gross proceeds only — no basis. |
| Wed, Apr 15, 2026 | Tax Day: 2025 returns, extensions, Q1 estimates | 2025 federal returns are due. Form 4868 buys six more months to file — never to pay. The first 2026 estimated payment is due the same day. |
| Mon, Jun 15, 2026 | Q2 2026 estimated tax due | Second quarterly date. A large gain realized in April or May belongs in this payment, not in next April’s return. |
| Tue, Sep 15, 2026 | Q3 2026 estimated tax due | Third quarterly date — and a good moment to reconcile year-to-date gains while there is still a quarter left to adjust. |
| Thu, Oct 15, 2026 | Extended 2025 returns due | The hard stop for anyone who filed Form 4868. After this date there is no further extension for a 2025 individual return. |
| Thu, Dec 31, 2026 | Last day to realize 2026 gains and losses | The tax-loss harvesting cutoff: a sale’s tax year is its trade date. It is also the last day of the temporary books-and-records safe harbor for specific identification described in our harvesting guide — from 2027, lot selection generally has to happen at the broker, at sale time. |
| Fri, Jan 15, 2027 | Q4 2026 estimated tax due | Final estimated payment for tax year 2026, ahead of the spring filing season. |
| By mid-Feb 2027 | Form 1099-DA for 2026 sales arrives | Second-year forms — and the first that include cost basis, for covered assets only. Reconcile them the same way; noncovered rows still arrive basis-free. |
| Thu, Apr 15, 2027 | 2026 federal returns due | Tax Day for the 2026 tax year, with Form 4868 extension requests due the same day. |
Why January 1, 2026 changed your paperwork
Form 1099-DA arrived in two stages. For sales in 2025, brokers report gross proceeds only — the forms that reached you in February 2026 say what you sold, not what you paid. For assets acquired on or after January 1, 2026 and held with the broker until sale, the asset is covered and the broker must also report cost basis, starting with the forms for 2026 sales in early 2027. Assets acquired before 2026, and anything you transferred in from another platform or a wallet, remain noncovered indefinitely: proceeds reported, basis blank, gap filled by your records on Form 8949. Our 1099-DA basis reporting guide walks the covered/noncovered rules, and the free 1099-DA reconciler quantifies what a blank basis box does to your gain.
Estimated taxes: the four dates inside the year
Wages get withheld; crypto gains do not. If you expect to owe at least $1,000 in federal tax after withholding and credits, the IRS wants the money quarterly — for 2026, by April 15, June 15, September 15, and January 15, 2027 — via Form 1040-ES or Direct Pay. Miss and the underpayment penalty accrues quietly even if your return is perfect in April. Two safe harbors protect most filers: paying at least 90% of this year’s tax, or 100% of last year’s (110% above $150,000 of AGI). The estimated taxes guide works the safe-harbor math, and the calculator turns a gain into a payment estimate.
Missed a date? What actually happens
- Missed an estimated payment: the underpayment penalty is computed per quarter on Form 2210; a late top-up stops it growing. It is a modest interest-like charge, not a catastrophe — but it does not forgive itself.
- Missed April 15 without an extension: file immediately. The failure-to-file penalty (5% of unpaid tax per month, capped at 25%) dwarfs the failure-to-pay penalty, so the return matters more than the money.
- Missed October 15 on extension: there is no second extension for an individual return. File as soon as possible and expect interest from the original April date on anything unpaid.
- Missed December 31 for harvesting: the loss belongs to the next year, permanently. A January sale cannot be pulled back into the year that just ended.
Our guide to what happens if you don’t report covers notices, audits, and the amendment path (Form 1040-X) in full.
FAQ
When will I get my 1099-DA?
Brokers furnish the form for the prior year’s sales by mid-February — February 17 in 2026, after the weekend and the Washington’s Birthday holiday. Forms for 2025 sales report proceeds only. Forms for 2026 sales, arriving in early 2027, add cost basis for covered assets.
Is April 15, 2026 really the filing deadline?
Yes — Wednesday, April 15, 2026, and no weekend or District of Columbia holiday shift applies that year. Your state deadline may differ; several states run on their own dates, which is why our state guides list them separately.
Do the quarterly estimated-tax dates apply to crypto gains?
Yes, if you expect to owe at least $1,000 in federal tax after withholding and credits. Crypto gains are not withheld anywhere, so a large mid-year gain is the classic trigger for Form 1040-ES payments on the April, June, September, and January dates.
What happens if I miss the October 15 extension deadline?
File as soon as you can anyway. The failure-to-file penalty keeps accruing until you file, and interest runs from April 15 on any unpaid balance — an extension has always been an extension of time to file, never of time to pay.
Is December 31 really a hard cutoff for tax-loss harvesting?
Yes. A sale’s tax year is set by its trade date: sell on December 31 and the loss belongs to that year; sell on January 1 and it belongs to the next. There is no grace period and no way to backdate a trade.
Sources
- IRS: Estimated Taxes (quarterly due dates)
- IRS: About Form 1040-ES
- IRS: Extension of Time to File Your Tax Return
- IRS: Instructions for Form 1099-DA (2026)
- IRS: Understanding your Form 1099-DA