Only those not yet time-barred
The Tax Agency has four years to review a return, counting from the end of the filing period. In September 2026, tax years 2022 to 2025 are, as a rule, still open.
Declaring Crypto from Previous Years in Spain
If you did not declare your crypto, regularizing your position before the Spanish Tax Agency (Hacienda) writes to you makes a big difference: you pay a surcharge instead of a penalty. We explain which years you can correct, what it costs and how to rebuild transactions from years ago.
Updated: September 2026 · Personal income tax (IRPF), Form 721 and wealth taxDidn’t declare your crypto? We explain how to regularize, free of charge
Tell us which years and which transactions worry you, and we will explain your options.
- 50+ entities advised
- Reply within 24 h
- No commitment
- Statute of limitations
- 4 years
- Surcharge after 12 months
- 15%
- Tax crime threshold
- €120,000
- Late-filing surcharge
- LGT Art. 27
What it costs
Regularizing on your own or waiting for the Tax Agency
What makes the difference is a prior request (requerimiento previo): if you file before the Tax Agency takes action, you pay a surcharge and there is no penalty.
| Situation | What you pay on top of the tax | Legal basis |
|---|---|---|
| You file within 12 months after the deadline | A surcharge of 1% plus 1% for each full month of delay. No interest and no penalty. | LGT Art. 27(2) |
| You file after more than 12 months | A 15% surcharge plus late-payment interest from month 13. No penalty. | LGT Art. 27(2) |
| You pay the surcharge and the tax debt on time | The surcharge is reduced by 25%. | LGT Art. 27(5) |
| The Tax Agency finds you first | The tax due, late-payment interest and a penalty that can range from 50% to 150% of the unpaid tax. | LGT Arts. 191 et seq. |
How to regularize, step by step
See penalties for not declaring
Any action the Tax Agency notifies you of to review that tax counts as a prior request: from that moment, you can no longer rely on the surcharge.
Step by step
How to declare crypto from previous years
Regularizing is not just filing a return: it means rebuilding years of transactions with an approach that will hold up in a tax review.
Not just sales
Sales for euros, crypto-to-crypto swaps, staking and payments made in crypto are all taxable. Transfers between your own wallets are not.
One return per year
If you already filed that year’s income tax return, you amend it in Renta WEB (a corrective self-assessment, or autoliquidación rectificativa, from the 2023 return onward; a supplementary return, or complementaria, for earlier years). If you did not file it, you file it late.
Regularizing your crypto in 10 steps
- Check that you have not received any communication from the Tax Agency about those years.
- Download the full history from all your exchanges, including those that have closed.
- Calculate the gain or loss on each sale and swap using the FIFO method.
- Split the results by year, based on the date of each transaction.
- Include staking and other income, not just sales.
- Check whether you exceeded the Form 721 threshold on any December 31.
- Check whether you had to file a wealth tax return in your autonomous community.
- File the return for each affected year in Renta WEB and pay the resulting amount.
- At the same time, file any missing Form 721: when filed late and without a prior request, the fine is halved.
- Keep the file (histories, calculations and supporting documents) in case the Tax Agency reviews it later.
Has the Tax Agency already written to you? Then this is no longer a voluntary regularization: read how to respond to a crypto information request.
Which years are still open
Tax years you can regularize in 2026
For guidance only, for returns subject to the usual income tax campaign deadline. The limitation period is interrupted by any Tax Agency action concerning that year.
| Tax year | Income tax return deadline | Becomes time-barred, as a rule |
|---|---|---|
| 2021 | June 30, 2022 | Time-barred since July 2026, unless interrupted. |
| 2022 | June 30, 2023 | June 2027 |
| 2023 | July 1, 2024 | July 2028 |
| 2024 | June 30, 2025 | June 2029 |
| 2025 | June 30, 2026 | June 2030 |
Watch out for unexplained wealth: the Tax Agency can treat it as an unjustified capital gain in the year it discovers it, unless you prove you already owned it before (Article 39 of the Personal Income Tax Law, LIRPF). That is why it is worth documenting how long you have held your crypto.
Old transactions
How to rebuild transactions from years ago
The hard part of regularizing late is not the form: it is finding the data. These are the sources used when histories are missing.
Active exchangesDownloadable history
Most exchanges let you download years of transactions. This is the main source and the first one to request.
- Transaction history
- Account statement
- Tax report
Closed exchangesEmails and statements
Confirmation emails for purchases and withdrawals, and the bank statements showing your payments to the exchange.
- Emails
- Statements
- Old screenshots
On-chainThe blockchain as an archive
On-chain transactions are still there: with your addresses, dates, amounts and paths can be rebuilt.
- Addresses
- TxID
- Dates and amounts
GapsWhen the purchase price is missing
If you cannot prove what you paid, the risk is that the cost is not accepted and almost the entire sale price is taxed. It has to be documented with all the evidence available.
Read how to prove the origin of your crypto when histories are missing.
What should I do?Depending on your situation
No letter from the Tax Agency
Regularize with a surcharge.
Request received
Respond on time with the supporting file.
Gaps in the records
A report that documents them.
Common cases
What to regularize in your case
You sold for euros and did not declare it
The gain or loss on each sale, in its own year.
Losses are declared too and can offset gains.
You only swapped one crypto for another
Each swap, even if you never cashed out to euros.
This is the most common mistake: swaps are taxable (DGT, binding ruling V0999-18).
You staked or received rewards
The income, at its value when you received it.
That value becomes your purchase cost when you later sell.
You held more than €50,000 on foreign exchanges
Form 721 for each year in which you exceeded the threshold.
It is an information return: no tax is payable, but there is a fine for not filing it.
You did not sell anything
Usually, nothing for income tax (IRPF).
Check Form 721 and wealth tax. See when to declare.
Mistakes when regularizing crypto
They can turn a regularization into a tax review.
- Declaring only sales for euros and forgetting swaps.
- Mixing up years: each transaction goes in the tax year in which it took place.
- Filing without keeping the calculation and the histories that support it.
- Regularizing part of your activity and leaving other platforms out.
- Waiting for a letter from the Tax Agency before acting.
Want to get up to date with the Tax Agency?
We rebuild your transactions, calculate each year and prepare the regularization with the file that supports it, before a request arrives.
Frequently asked questions
Declaring crypto from previous years: common questions
Can I declare crypto from previous years?
Yes. As long as the tax year is not time-barred and the Tax Agency has not notified you of anything about it, you can file or correct that year’s return. You will pay a surcharge, but there will be no penalty.
How much is the surcharge for filing late?
1% plus another 1% for each full month of delay if you file within 12 months after the deadline. After that year, 15% plus late-payment interest. The surcharge is reduced by 25% if you pay on time.
Which years can I regularize?
Those that are not yet time-barred. The Tax Agency has four years to review a return, counting from the end of the filing period: in September 2026, tax years 2022 to 2025 are, as a rule, still open.
What if the Tax Agency has already sent me a letter?
Then it is no longer voluntary: if the letter concerns that tax and that year, you cannot rely on the surcharge. You have to respond within the deadline. Read how to respond to a crypto information request.
Do I have to declare if I only swapped one crypto for another?
Yes. According to the Directorate General of Taxes (DGT), exchanging one crypto for another is a swap (permuta) that generates a capital gain or loss, even if you never cashed out to euros.
What if I did not file Form 721?
You can file it late. If you do so without a prior request, the fine for filing an information return late is halved. More information on Form 721.
What if I don’t have the history from an exchange that has closed?
It is rebuilt from emails, bank statements and on-chain traceability. If the purchase price is missing, it has to be documented with all the evidence available so that the cost is accepted.
Can failing to declare crypto be a crime?
If the tax evaded for one tax and one year exceeds €120,000, it can be a tax crime (Article 305 of the Criminal Code). A full regularization before the Tax Agency takes action also has effects in that area.
What the law says
Why it pays to regularize early
The law favors those who correct things on their own and is harsher on those who wait to be found out.
The Tax Agency has data: Forms 172 and 173, your Form 721 returns and, from 2027, the DAC8 information exchange.
Banks ask questions: if you move undeclared crypto money into your bank account, you will have to explain a source that does not match your income tax returns.
Time is running: every month of delay increases the surcharge, up to 15%.
LGT · Art. 27
Surcharge, no penalty
Filing late without a prior request means a surcharge that rules out penalties.
LGT · Art. 179(3)
Voluntary regularization
Those who regularize voluntarily are not liable for the offenses committed in their original returns.
LIRPF · Art. 39
Unjustified gains
Wealth with no proven source can be taxed as an unjustified capital gain, in the general tax base.
Contact
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Tell us which years and which transactions you did not declare: we will tell you how to regularize and what it would cost, before a letter arrives.
Declaring crypto from previous years
If you did not declare your crypto, you can regularize by filing or correcting the return for each tax year that is not yet time-barred. If you do so before the Tax Agency notifies you of any action concerning that tax and that year, you pay a surcharge under Article 27 of the General Tax Law and there is no penalty (Article 179(3)).
Surcharge or penalty
The surcharge is 1% plus 1% for each full month of delay during the first 12 months, and 15% plus late-payment interest after that. It is reduced by 25% if you pay on time. If it is the Tax Agency that detects it, a penalty of 50% to 150% of the unpaid tax is added. We explain this in penalties for not declaring crypto.
Which transactions and which years
You must declare sales for euros, crypto-to-crypto swaps and income such as staking, each in its own year and using the FIFO method. The Tax Agency has four years from the end of the filing period: in September 2026, tax years 2022 to 2025 are, as a rule, still open.
Form 721 and wealth tax
If your crypto on foreign platforms exceeded €50,000 on any December 31, you must also file the missing Form 721; filed late and without a prior request, the fine is halved. Also check whether wealth tax (Impuesto sobre el Patrimonio) applied to you in your autonomous community.
Official sources
Key legislation, linked to the official text:
- Law 58/2003, of December 17, the General Tax LawBOE · consolidated text
- Law 35/2006, of November 28, on Personal Income TaxBOE · consolidated text
Legislation and links reviewed in .