Marta is a self-employed physiotherapist in Valencia. She has a part-time assistant on the payroll, and in the spring she had a designer build the website for her practice, who invoiced her 1,600 € plus VAT. Each month she withheld 69 € from her assistant's pay; from the designer, 15 % of his invoice, 240 €. All correct so far. What she did not do was file the Modelo 111 for the second quarter, which was due on 20 July. She noticed at the end of September, while preparing the third-quarter one: 447 € of withholding still sitting in her account that had never been hers.
Her question was the one almost everyone asks in that position: how much is this going to cost me, and what do I do first? The short answer is that, if nobody at Hacienda (the Spanish tax authority) has written to her yet, it costs very little, provided she moves before the Administration does.
What the rules on the 111 require, and when you are in breach
The 111 is the quarterly return in which anyone who pays salaries or professionals' invoices pays over what they withheld. It is filed from 1 to 20 April, July, October and January, each time for the previous quarter, and the payment goes in with the return itself. It is not a tax on the person filing it: it is other people's income tax (IRPF), paid in advance by whoever pays them. That is why the breach happens on the 21st, with no warning or letter needed, and from then on the surcharge clock is running.
Article 27 of the Ley General Tributaria, Spain's General Tax Act, rewards those who put things right on their own initiative: there is no penalty, only a recargo, the surcharge for filing late unprompted, of 1 % plus one point for every full month of delay. After twelve months the recargo is 15 % and late-payment interest is added. And if it is paid on time, the recargo is cut by 25 %. There is one condition for all of this: there must have been no prior request (requerimiento previo) from the Administration about that quarter. What does and does not count as a prior request is explained in this guide, because some letters look like one and are not.
Marta's 447 euros, month by month
This is what the recargo costs depending on the day she files. It runs from 21 July, and each full month that goes by adds one point:
| Files between… | Full months | Recargo | Amount | Paid on time (−25 %) |
|---|---|---|---|---|
| 21 Jul and 20 Aug 2026 | 0 | 1 % | 4.47 € | 3.35 € |
| 21 Aug and 20 Sep 2026 | 1 | 2 % | 8.94 € | 6.71 € |
| 21 Sep and 20 Oct 2026 | 2 | 3 % | 13.41 € | 10.06 € |
| 21 Dec 2026 and 20 Jan 2027 | 5 | 6 % | 26.82 € | 20.12 € |
| 21 Jun and 20 Jul 2027 | 11 | 12 % | 53.64 € | 40.23 € |
| From 21 Jul 2027 | more than 12 | 15 % + interest | 67.05 € | 50.29 € + interest |
Marta filed on 25 September: two full months, 3 % and, paying when the assessment arrived, 10.06 €. The detailed month count, including the cases where the 20th falls on a weekend, is in how to calculate the article 27 recargo.
Step by step, in the right order
- Gather what was actually withheld. The three payslips for April, May and June and the designer's invoice. The 111 is filed with what was withheld in the quarter, not with what was paid in it.
- File the second-quarter 111 as an ordinary return, out of time, for the full amount. It is not a supplementary return (complementaria): a supplementary return corrects a return that exists, and here there was none.
- Pay the 447 € when filing, by direct charge to your account or with an NRC (the payment reference code the bank issues). Without that payment there is no 25 % reduction on the recargo.
- Wait for the recargo assessment. The recargo is not calculated on the form: the Agencia Tributaria assesses it afterwards by letter, and it is paid within the period that letter sets.
Why asking for time does not work here
There is one detail that changes the strategy compared with other forgotten returns. If Marta had not had the 447 €, the temptation would be to file and ask to pay in instalments (an aplazamiento). With the 111 it does not work: debts arising from withholding are on the list of debts that cannot be deferred in article 65.2 of the Ley General Tributaria, and such an application is declared inadmissible and treated as never filed. The full explanation, with the whole list, is in the debts that cannot be deferred.
And there is a less visible effect: anyone who files late with a deferral granted without a guarantee also loses the 25 % reduction on the recargo. On a small 111 the difference is a few euros; on the 111 of a business with fifteen payslips, the numbers change.
If in your case the lapse covers more than one quarter, or you are not sure which withholding was due, tell us about it in the self-employed form and we will tell you which periods have to be filed and for what amount before anyone else asks.
What almost nobody tells you about this lapse
The 111 does not live on its own. Every January, from the 1st to the 31st, whoever withholds files Modelo 190, the annual summary with the detail of each recipient: name, tax number (NIF), what they were paid and what was withheld from them. If the second-quarter 111 is missing, Marta's 190 will say she withheld 447 € that she never paid over. And it will say so in the very month her assistant and the designer receive their tax data with that withholding included.
That is the cross-check that turns a lapse into a case file. Neither the assistant nor the designer loses anything: they deduct in their income tax return the withholding shown for them. The one left exposed is the payer, with a piece of evidence against her that she declared herself. Putting it right before January stops the first notice from arriving in the form of a requerimiento.
The second point worth knowing is the price of waiting for them to write. If Hacienda sends a request before Marta files, there is no longer a recargo but a penalty, and article 191 of the Act is especially harsh on failing to pay over withholding that was actually deducted: where it exceeds half of the amount not paid, the offence is classed as very serious, with a fine of 100 to 150 %. On 447 € that means a minimum penalty of 447 €, which with the 30 % reduction for agreeing to the assessment and the 40 % reduction for prompt payment would come down to 187.74 €. Set against the 10.06 € recargo, the difference needs no comment. It is set out in more detail in recargo versus penalty.
A requerimiento, or the opening of a review of that quarter, closes the door on the recargo. Filing then is not putting things right: it is answering, and it is done within the procedure that has been opened, with its own deadline and its own form. Reading the letter calmly before you press «submit» avoids turning one problem into two.
The next quarter, which is the one that really matters
A one-off lapse is fixed with ten euros. What gets expensive is repeating it, because each quarter is a separate offence and the January cross-check brings them all out at once. For Marta, the practical fix was to separate the money: on the day she pays salaries and professionals' invoices, she moves what she withheld to an account she does not touch, and on the 1st of the filing month she already knows how much has to be paid.
She also checked something that tends to be overlooked: if in some quarter she pays no professional and no salary, the 111 does not always have to be filed, because the regulations only require a nil return when income subject to withholding is paid and nothing is withheld because of the amount. But as long as the census (the tax register of her obligations) says she has the obligation, the Administration will expect a return every quarter. Keeping the census up to date with Modelo 036 is what prevents letters about quarters in which there was nothing to pay. You have the full picture of both kinds of withholding in the guide to Modelos 111 and 115.