Daniel has lived in Valencia since 2019. In February 2026 his mother, who lives in Madrid, gave him €90,000 by bank transfer. He entrusted Modelo 651, the gift tax return, to a gestoría (an administrative agency that files forms for clients) in Madrid, close to his mother, which filed it with the Madrid administration and applied that community's relief: it paid in €180. In July Daniel received a communication from the Valencian administration. A gift of money is not taxed where the giver lives but where the recipient resides, and there the tax, according to the proposal he has received, is €6,300 (that is the figure in this case: with the reliefs each region has in force on the date of the gift, the tax can be much lower, and it is always checked). Daniel wants to know who pays that. He pays the tax. What the error has cost him on top of it, perhaps not.
The person liable is always the donee
Article 5 of Ley 29/1987, the inheritance and gift tax act (Impuesto sobre Sucesiones y Donaciones), makes the donee the taxpayer. Daniel is the one who answers to the administration, whether he filled it in himself, his mother did or a gestoría did. The relationship with the professional is a services contract: if it was breached, the claim goes through the civil courts, with the professional's liability insurance involved, but it cannot be raised against Hacienda, the tax authorities, as a reason not to pay. Being clear about this from the start avoids losing months arguing with the administration over something that is not for it to decide.
Where the gestoría went wrong
Ley 22/2009, which governs the ceding of taxes to the autonomous communities (Spain's regions), assigns gifts of money to the community where the donee has lived the most days in the previous five years. Gifts of property go to the community where the property is located. Daniel has been in Valencia for seven years: the competent community is Valencia, and it is its regional law that decides reductions and relief. Applying Madrid's because the mother lives there is the most common mistake with this tax, and we explain it with examples in the table of competences for the ISD (the Spanish initials of the tax).
What counts is the days spent in each territory, not the padrón (the municipal register of residents) nor the address held by the bank. Had Daniel moved to Valencia only two years ago, after living in Madrid for six years before that, the competent community would still be Madrid, because over the previous five years he spent more days there. That is why the gestoría's mistake is not obvious to just anyone: you have to ask and count, and that is exactly what it did not do.
Common mistakes in a Modelo 651 and how to fix them
| Mistake | What it causes | How it is fixed |
|---|---|---|
| Wrong community | An assessment from the right community; an undue payment to the other | Pay the right one and ask the wrong one for a refund |
| Relief applied without meeting a formal requirement, such as the deed | An assessment for the difference | Consider whether the requirement can still be met; if not, accept the tax |
| Earlier gifts not accumulated | A lower rate applied than the correct one | A supplementary self-assessment, with a surcharge if it is voluntary |
| Relief that did apply and was not claimed | Tax overpaid | An application for rectification and a refund with interest |
| Declared value of the property far below the reference value | A valuation check | Document the value or accept the difference |
Splitting up Daniel's bill
The figures in this case are assumed, and we do not express regional relief as a percentage because it depends on each law and each year. What matters is to separate what Daniel owed anyway from what the error costs him:
| Item | Amount | Is it a loss caused by the error? |
|---|---|---|
| Tax in the right community | €6,300 | No: he owed it from the start |
| Payment to the wrong community | €180 | No, if it is recovered through the refund of undue payments |
| Late-payment interest in the assessment | Depending on the days and that year's rate | Arguable: Daniel had that money in his hands in the meantime |
| Penalty, if one is imposed | From 50 % of the amount not paid in | Yes, if it stems from the error and not from false data given by the client |
| Fees to correct it | Those of the professional who puts it right | Yes |
| Relief lost because of the error | The difference that cannot be recovered | Yes, if the requirement was missed on the gestoría's advice |
What almost nobody mentions is the first row. A claim against a gestor that asks for the whole tax usually fails, because that amount is not damage: it is the tax. What is claimed is what would not exist without the error, and the better it is separated out, the easier it is for the insurer to accept it.
The penalty and due diligence
Filing with the wrong administration is not the same as not filing. Article 179 of the Ley General Tributaria, Spain's General Tax Act, excludes liability for an infringement when the necessary diligence has been shown, and it expressly mentions the case of someone acting on a reasonable interpretation of the rule. Daniel declared the gift, paid what he was told and relied on a professional. These are arguments against a penalty, not a guarantee that one will not come. They are put forward in the alegaciones, the written submissions, with the engagement documents, and when they can be made is explained in from the proposal to the assessment.
The €180 paid in Madrid is not automatically set off against what Valencia is asking for: they are two different administrations. A refund of undue payments has to be requested from the Madrid administration, and that right also lapses after four years. It is a small amount in this case, but in other cases the tax paid to the wrong community is the big one.
When the error favours the client and nobody has spotted it
Sometimes the failure runs the other way: the gestor applied relief that did not apply, or did not accumulate earlier gifts, and the client paid less than was owed without any administration having noticed yet. As long as no requerimiento, a formal request, has arrived, a supplementary self-assessment can be filed for the difference, identifying the original gift. The recargo of article 27 of the Ley General Tributaria is paid, the surcharge for filing late unprompted, 1 % plus one point per full month, and there is no penalty. If the difference were €4,000 and it were put right after five full months, the surcharge would be 6 %, €240, or €180 with the 25 % reduction. That surcharge is indeed a loss arising from the error and can be included in the claim; the difference in tax cannot.
The file for talking to the gestoría
- The engagement: quote, invoice or email in which the gestoría takes on Modelo 651.
- The data Daniel gave it: if it is on record that he said he lived in Valencia, responsibility for the competence error is hard to dispute.
- The Modelo 651 as filed and the receipt for the payment in Madrid.
- The proposal or assessment from Valencia and, when it arrives, the decision on the penalty, if there is one.
- The calculation of the loss, item by item, as in the table above.
- A letter to the gestoría setting out the facts, quantifying them and asking for the details of its professional liability policy.
We cannot tell you in advance whether the gestoría or its insurer will pay. We can tell you that a file put in order like this turns an argument about impressions into one about documents.
Where we start
The urgent thing is not the claim but whatever deadline is open in Valencia to make submissions or pay. Then, the refund in Madrid. And in parallel, the letter to the gestoría. If you are in a similar situation, the inheritance and gift form lets us see which administration is right and how much room is left. The rest of the tax is on inheritances and gifts, and cases with family spread across countries in international gifts and relief.