Carmen is a pharmacist in Oviedo, with a pharmacy that is doing well, two properties and a securities portfolio. In 2023 her gestoría (the local firm that handles her tax paperwork) filed her Modelo 714, the Spanish wealth tax return, with a tax bill of 30,000 euros. This summer, going through her papers with a new adviser, she discovers that she paid 9,000 euros too much. The cause was not a valuation error or an extra asset: it was that nobody applied the joint limit with income tax.
Carmen's case is the reverse of what people usually think of when they talk about an adviser's mistakes. The mistake does not always leave you owing Hacienda (the Spanish tax authority): sometimes Hacienda owes you. And each direction is corrected by a different route.
The four mistakes we see most in the 714
| Mistake | Effect | How it is corrected |
|---|---|---|
| Not filing because the tax was zero, with more than 2,000,000 euros in assets | Return omitted, no tax | Late filing; reduced fixed fine if there has been no request |
| Valuing property only at the valor catastral (the cadastral value) when the acquisition value was higher | Too little tax paid | Supplementary self-assessment with the recargo, the surcharge for filing late unprompted |
| Not applying the exemption for the main home or the family business | Too much tax paid | Rectification of the self-assessment and refund with interest |
| Not applying the joint income and wealth tax limit | Too much tax paid | Rectification of the self-assessment and refund with interest |
Carmen's mistake, in figures
The wealth tax law provides that the sum of the IRPF (personal income tax) and the wealth tax cannot exceed 60% of the IRPF taxable base, with some adjustments, and that if it does, the wealth tax is reduced, up to a maximum of 80%. Carmen's figures for 2023:
- Taxable base of her IRPF, with the adjustments the rules require: 60,000 euros.
- Limit: 60% of 60,000 euros = 36,000 euros.
- IRPF tax: 15,000 euros. Wealth tax before the limit: 30,000 euros. Total: 45,000 euros.
- Excess over the limit: 45,000 − 36,000 = 9,000 euros.
- Maximum reduction allowed: 80% of 30,000 euros = 24,000 euros. The 9,000 euros fit.
- Correct wealth tax: 30,000 − 9,000 = 21,000 euros.
Carmen paid 9,000 euros too much. It is a simplified case: in the real calculation you have to exclude the part of the wealth tax corresponding to assets that do not generate income taxed in IRPF, and the part of the savings base that comes from gains on the sale of assets held for more than a year. Those adjustments can change the result a great deal, and they are explained in the joint income and wealth tax limit.
How Carmen gets back what she overpaid
A self-assessment that works against the taxpayer is corrected by asking the tax authority to rectify it. The deadline is the limitation period: four years from the end of the filing deadline. The 714 for 2023, whose deadline ended on 1 July 2024, can be rectified until mid-2028.
If the rectification succeeds, the Agencia Tributaria refunds the 9,000 euros plus late-payment interest from the date of payment. It is not automatic: the administration reviews the calculation and may ask for the figures to be justified. And, as with any application, the outcome is estimated, not guaranteed. But the right exists, and it is one of the most forgotten in this tax. The general framework of the tax, with each region's tax-free allowance, is on the wealth tax page.
If you suspect your 714s may have a similar mistake, the wealth tax form asks you for the figures for recent years so that they can be reviewed.
When the mistake goes against Hacienda
The opposite case is more uncomfortable. If your adviser valued a flat at its cadastral value of 150,000 euros when you bought it for 280,000 euros, you have paid too little. The correction is a supplementary self-assessment, with the article 27 recargo if it is filed before Hacienda acts, or with an assessment and a possible penalty if the administration gets there first.
That mistake usually comes in series: if it was valued wrongly one year, it was valued wrongly in all of them. It is worth reviewing the four open years together. And it is worth reviewing the income tax return too, because the acquisition value of that flat is the same one that will be used to calculate the gain when it is sold.
If one year you paid too much because of the joint limit and another year too little because of the valuation, you cannot subtract one from the other and leave it there. Each tax year and each mistake follows its own route: rectification for what was overpaid, a supplementary return for what was underpaid. Filing them at the same time is reasonable; mixing them is not.
How to spot whether your 714s have the same problem
You do not need to redo every return to know whether reviewing them is worthwhile. Three checks give a good clue:
- Add the income tax and the wealth tax for the same year and compare the total with 60% of your IRPF taxable base. If the total is clearly above that limit, you need to see whether the reduction was applied.
- Look in your 714 for the box for the main home exemption. If your home appears at its full value, the exemption is missing.
- Compare the value at which your properties appear with what you paid for them. If the cadastral value appears and you bought for more, there is a difference against you.
The first two work in your favour; the third against you. That is why the review is done in full: it would not be the first time someone asks for a refund and, on reviewing it, the administration finds the opposite.
What can be asked of the gestoría, and how
Before Hacienda, the person obliged is Carmen. The relationship with her gestoría is a contract for services, and whatever the gestoría is liable for is claimed through the civil courts, not before the Agencia Tributaria.
In Carmen's case, if the rectification succeeds, the money comes back to her from Hacienda with interest. What she could claim from the gestoría is what the mistake has cost her: the fees for the rectification and, if the rectification failed because some tax year had become time-barred, the tax lost for those years. For that she needs the engagement letter or the invoices showing that the gestoría handled that tax for her, and the returns it filed. The usual route is a formal demand by a means that leaves proof of delivery, asking the gestoría to notify its professional liability insurer.
In the opposite case, the wrongly valued flat, the tax itself cannot be claimed, because it was owed anyway. What can be claimed is the surcharge, the interest or a penalty that would have been avoided with a correct calculation, provided the information was in the adviser's hands.
One more point: the gestoría is not obliged to repay what Hacienda is going to repay. If Carmen claimed the 9,000 euros from her former adviser and from the Agencia Tributaria at the same time, she would be asking to be paid twice for the same loss. The claim against the professional makes sense for what is not recovered through the tax route, and it is worth waiting to know what is recovered before putting a figure on it.
And a lesson Carmen will apply from now on: the 714 and the income tax return have to be prepared together. The joint limit can only be applied if whoever prepares the wealth tax return knows the income tax return. Giving each return to a different person, or filing them on widely separated dates, is the most direct way for it to slip through.
Two questions about an adviser's mistake in Modelo 714
If the mistake was my adviser's, am I still liable?
Before Hacienda, yes: in Modelo 714 the taxpayer is you, and the debt is claimed from you. What you can do is argue that there was no fault, which is what can bring down the penalty, not the debt, and, on a completely different level, claim against the professional or his insurer. They are two separate things and they follow separate routes.
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.