Carlos is a self-employed graphic designer in Madrid. He filed his 2025 income tax return on 29 June 2026 showing €2,500 to pay, chose "payment by acknowledgement of debt" without applying for deferral, and did not pay. He thought the tax office would send him a letter with a reasonable deadline. What arrived in September was an enforcement order (providencia de apremio) with a surcharge, and in November a notice from his bank: the balance of the account into which his clients paid him had been frozen.
Not paying your income tax return is not a problem that arrives all at once: it arrives in phases, each more expensive than the last, and in each one there is still some room. This page describes them with deadlines and figures. The overall picture of a self-employed person's obligations is on our self-employed in Spain page.
The full sequence, with dates
| Moment | What happens | Surcharge on €2,500 |
|---|---|---|
| 30 June | End of the voluntary payment period | — |
| From 1 July, before the enforcement order | The debt is in the enforcement period (periodo ejecutivo); you can pay on your own initiative | 5 %: €125 |
| Notification of the enforcement order | A deadline opens: if notified between the 1st and the 15th, until the 20th of the following month; if between the 16th and the end of the month, until the 5th of the second month | 10 %: €250 |
| End of the enforcement order's deadline without payment | Seizure orders | 20 %: €500 plus late-payment interest and costs |
Carlos received the enforcement order in mid-September. Had he paid then, within the order's deadline, it would have cost him €2,750. He did not, and the bill rose to €3,000 plus interest from 1 July, on top of whatever the seizure itself cost. What decides the percentage is when you pay, not the amount.
Filing without paying is not the same as not filing
Carlos, at least, filed. Had he not filed the return, the Agencia Tributaria, the Spanish tax agency, would have detected it through his clients' data and assessed the tax with interest and a penalty for failing to pay (article 191 of the Ley General Tributaria, the General Tax Act), starting at 50 % of the tax. With €2,500 of tax, that means a fine of €1,250 before reductions, plus the tax and the interest. And if he did not pay the assessment either, the surcharges in the table would follow.
Filing on time, even if you cannot pay, turns a 50 % penalty into a surcharge of 5 %, 10 % or 20 %. It is the cheapest decision in this whole process.
What the Agencia Tributaria can seize
Article 169 of the General Tax Act sets the order, according to how easy each asset is to collect and how little burden it places on the debtor:
- Cash or money in accounts at credit institutions.
- Receivables, bills, securities and rights that can be realised immediately or in the short term, such as invoices your clients have yet to pay you.
- Wages, salaries and pensions.
- Real estate.
- Interest, rents and income of every kind.
- Commercial or industrial establishments.
- Precious metals, gemstones, jewellery, goldsmiths' work and antiques.
- Movable property and livestock.
- Receivables, rights and securities realisable in the long term.
Not all of a salary or pension is seized. By reference to the Ley de Enjuiciamiento Civil, the Civil Procedure Act, an amount equal to the national minimum wage cannot be seized, and increasing percentages by bands are applied to the excess: 30 %, 50 %, 60 %, 75 % and 90 %. With bank accounts, the bank freezes the balance and the part corresponding to wages or pensions is released afterwards if that origin is proved.
If you are in one of these phases and want to know the least expensive way out, tell us about it in the self-employed form.
The refunds that will not arrive
While the debt is outstanding, any refund due to you can be set off against it automatically: a VAT refund if you are self-employed, another year's income tax refund, a negative Modelo 303 (the quarterly VAT return). The Agencia Tributaria will not pay it to you; it will apply it to the debt. Nor will you be able to obtain a certificate showing you are up to date with your tax obligations, which for a self-employed person who contracts with public bodies or applies for grants is a problem as serious as the seizure.
Joint returns, the 60/40 split and enforcement: three nuances of non-payment
With a joint return the debt is joint and several. If one spouse does not pay, the Agencia Tributaria can seize the other's account or salary for the full amount.
If you split the payment 60/40 and do not pay the second instalment on 5 November, only that 40 % goes into enforcement. The first payment is not lost.
And even in enforcement you can apply for deferral or payment in instalments, up until the sale of the seized assets is ordered. It does not erase the surcharge already incurred, but it can halt sales of assets while it is being processed. The mechanics are in how to apply for a deferral, and the detail of spreading a debt that has already been regularised, in deferring a debt from a regularisation.
How long the tax office can pursue the debt
The Agencia Tributaria's right to collect a debt already assessed or self-assessed becomes time-barred after four years, but that period is interrupted by every collection action notified to you: the enforcement order, a seizure notice, a request for information sent to your bank. In practice, a debt in enforcement does not become time-barred as long as the administration keeps it moving, and it normally does. And if the debtor dies, the tax debt passes to their heirs, who answer for it under the rules of inheritance (article 39 of the General Tax Act); what does not pass on are penalties. An unpaid income tax return can thus end up in the inventory of an estate, reducing what the children receive. Waiting for the problem to disappear on its own is almost never a strategy.
When the debt is large
Above certain amounts, non-payment stops being a private matter. The General Tax Act provides for the annual publication of the list of debtors with outstanding debts above €600,000 that have been neither deferred nor suspended. Very few taxpayers with an unpaid income tax return get there, but it is worth knowing that the threshold exists and that a deferral that has been granted takes the debt out of the calculation.
The income tax program lets you tick acknowledgement of debt with an application for deferral or payment in instalments. Filed that way on time, the debt does not enter the enforcement period while the application is being decided. For debts of up to €50,000 no guarantee is required. It is what Carlos did not do, and it would have spared him the whole journey.
What to do depending on where you are
- It is before 30 June: file with the 60/40 split or with an application for deferral.
- 30 June has passed and there is no enforcement order: pay as soon as possible; the surcharge is 5 %.
- You have the enforcement order: pay within its deadline to stay at 10 %, or apply for payment in instalments.
- There is already a seizure: ask for whatever cannot be seized to be released by proving its origin, and negotiate instalments for the rest.
Carlos paid in December, with the 20 % and the interest, and, with the debt paid, asked for what was still frozen to be released. What cannot be asked is for a balance to be released because it was meant for other payments: the law only protects, within its limits, wages, pensions and equivalent amounts. We could not get the surcharge back for him; we could stop the seizure from reaching his clients. If your question is about the ways of paying on time, it is in how to pay your income tax return.