Rafael is 71, lives in Sevilla and is an old-school saver: his home, two rented flats in Triana, a portfolio of funds and what he keeps in the bank. Added together, a little over 2.4 million euros. When Andalucía approved the tax relief (bonificación) that brings the Spanish wealth tax, the Impuesto sobre Patrimonio, down to zero, his former adviser told him to forget about Modelo 714, the wealth tax return. And Rafael forgot about it for three years. Now his daughter, who handles the family's paperwork, has read that it had to be filed anyway.
She is right. And the good news is that the cost of that oversight, in his case, is among the lowest a tax mistake can have. Let us see why, and in which different case the same oversight would come out considerably more expensive.
Why it had to be filed even though the tax was zero
Law 19/1991 on the wealth tax requires a return in two situations: when there is tax to pay, or when, even with nothing to pay, the value of the assets and rights exceeds 2,000,000 euros. That second situation is the one almost everybody is unaware of, and it is measured on the value of the assets without subtracting debts: a mortgage does not take you out of the obligation.
The Andalusian relief acts on the tax itself, at the end of the calculation. It does not touch the obligation to file, which is decided earlier. Rafael, with 2.4 million in assets, was obliged in 2023, 2024 and 2025 even though he did not have to pay a single euro. And watch 2022: that year’s 714 was due on 30 June 2023, so it does not become time-barred until June 2027 and, if he was already obliged then, it has to be put in order too. We develop this in the guide on the obligation to file the wealth tax return.
Rafael's figures, year by year
This is his wealth at 31 December 2025, valued under the rules of the tax:
| Asset | Value for the tax | How it is valued |
|---|---|---|
| Main home | 650,000 euros | Exempt up to 300,000 euros |
| Two rented flats | 900,000 euros | The highest of valor catastral (the cadastral value), value verified by the tax authority and purchase price |
| Investment funds | 700,000 euros | Net asset value at 31 December |
| Bank accounts | 200,000 euros | The higher of the balance at 31 December and the average balance for the fourth quarter |
| Total assets | 2,450,000 euros | Over 2,000,000 euros: obliged to file |
Subtracting the 300,000 euros exempt for the home, the taxable base comes to 2,150,000 euros, and subtracting the 700,000 euro tax-free allowance, the net taxable base comes to 1,450,000 euros. With the tax that comes out of the scale and the Andalusian relief applied, the result is zero. Rafael's net wealth does not reach the thresholds of the large fortunes tax, so that front does not open either.
If your situation is similar and you want us to look at it with your figures, the wealth tax form collects what is needed in two minutes.
What it costs when there was nothing to pay
Filing a self-assessment late when it causes no financial loss to the Treasury is the offence in article 198 of the Ley General Tributaria (the General Tax Act): a fixed fine of 200 euros. If it is filed without a prior request from the tax authority, it is halved. For Rafael:
- Three returns filed late: 2023, 2024 and 2025.
- Fine for each, filing on his own initiative: 100 euros.
- Total: 300 euros, which fall a further 40% if he pays on time and does not appeal: 180 euros.
There is no recargo under article 27 (the surcharge for filing late unprompted) because there is no tax left unpaid, and no late-payment interest for the same reason. Rafael's oversight is fixed with three returns and a minor fine. Where there must be no mistake is the valuation: if the flats are undervalued when filing late, what was a formal matter can turn into a review.
The same oversight when there was something to pay
Rafael's sister, Mercedes, lives in another region without full relief. Her 714 for 2024 showed 4,200 euros to pay, with a deadline of 30 June 2025. She files it on 10 October 2026. Here the calculation is different:
| Step | Calculation | Amount |
|---|---|---|
| Full months of delay | From 1-7-2025 to 10-10-2026 | 15, more than 12 |
| Article 27 recargo | 15% of 4,200 euros | 630.00 euros |
| 25% reduction if she pays on time | 630 euros × 0.75 | 472.50 euros |
| Late-payment interest | From 1-7-2026 to 10-10-2026, at the legal rate | About 46 euros with a rate of around 4% |
| Total on top of the tax | ≈ 519 euros |
Mercedes pays her 4,200 euros of tax plus about 519 euros. Had she filed within the first three months, the surcharge would have been between 1% and 3%. Every month counts, and the surcharge calculator is explained in how the article 27 recargo is calculated.
If the overdue tax is large and you need to defer it, bear in mind that the reduction of the surcharge requires paying on time, or deferring with a bank guarantee or a surety insurance certificate. A deferral with the guarantee waived, which is the usual route for small amounts, loses that reduction. It is worth doing the sums before choosing.
Details of a late wealth tax return that change the result
Valuations are those of each 31 December. When filing the three years at once you have to ask the bank for the certificates for each date, not today's. Rafael's funds were worth something different in 2023 from 2025, and a 714 for 2023 with 2025 figures is a 714 done wrong. The rules for each type of asset are in how assets are valued for the wealth tax.
The obligation is individual. If Rafael were married under the community property regime (gananciales), each spouse would report their half. It can happen that one exceeds 2,000,000 euros and the other does not, depending on how the separately owned assets are divided.
The 714 is cross-checked with the income tax return. Hacienda (the Spanish tax authority) compares what you report as wealth with what you report as income. Funds of 700,000 euros that never generate a gain in the income tax return are normal if they are accumulation funds and are not sold; rented flats worth 900,000 euros with no rent in the income tax return are not. If regularising the wealth tax shows that something is missing from the income tax return, both are corrected at the same time.
The limitation period is four years from the end of each filing deadline. The 714 for 2021, whose deadline ended on 30 June 2022, no longer generates a penalty from 30 June 2026. If any open tax year predated the Andalusian relief, it deserves a separate review, because then the tax was not zero.
Which papers to ask for before filing the three years
Rafael's daughter can have everything within two weeks if she asks for the right things first time:
- From the bank, a certificate for wealth tax purposes as at each 31 December of 2023, 2024 and 2025, with year-end balances and average balances for the fourth quarter. Most banks issue it on request, even if they do not send it by default.
- From the fund manager, the net asset value and the number of units at each 31 December.
- For the flats, the purchase deeds with their price and the IBI (the annual local property tax) receipts showing the valor catastral for each year.
- For the home, the same, plus something proving that it is the main home, such as the padrón, the municipal register of residents.
With that, the three returns are prepared in one sitting. And it is worth filing it all away: next year's 714 will be done with the same papers for one more year.
And one last warning, which we apply to every case: the cost of regularising is estimated, not guaranteed. It depends on there having been no prior communication from the Agencia Tributaria about that tax and those years, and on the valuations standing up to a review. That is why they are done with the certificates in front of you and not from memory.
What people ask us about a forgotten Modelo 714
Should I wait and see whether they ask me for the Modelo 714?
No. With Modelo 714, when it is filed late, the recargo in article 27 of the Ley General Tributaria goes up one point for each full month of delay, and after twelve months it becomes 15% plus interest. But that is not the expensive part: the moment a request arrives the recargo disappears and what opens is penalty proceedings. The difference between moving today and waiting for them to move is usually thousands of euros.
My region gives 100% relief, so do I not file?
The other way round: the relief removes the tax, not the obligation. And it is precisely what brings the large fortunes tax into play, which is a different tax altogether.