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Retention period for tax documents in Spain: 4, 6 or 10 years?

Responsible for this content: Frank Menze

Anyone moving from Germany to Mallorca often brings along the idea of a single, long retention period. In Spain, things work differently: here, three different clocks run in parallel, and which one applies to you depends on whether you're a private individual, landlord, self-employed person or business owner. The tax limitation period under the Ley General Tributaria is four years, commercial law requires business owners to keep records for six years, and in the case of carried-forward losses or deductions, the tax authorities can request documents even after ten years. In this guide, you'll learn which deadline applies to your situation, when it actually starts running, why "time-barred" doesn't automatically mean "can be thrown away" – and why purchase documents for a property often need to be kept for much longer than the four years might suggest.

Tax documents in Spain: retention periods

Not sure which documents you still need and which can go in the shredder?

The three clocks at a glance

Unlike German law, with its central Abgabenordnung, Spanish retention obligations are spread across several laws with different aims. For private individuals without business activity, generally only the tax limitation period is relevant. Anyone who is self-employed, an autónomo or a shareholder also needs to keep an eye on the commercial-law deadline – and anyone carrying forward losses or deductions over several years needs to watch the ten-year review period as well.

Clock Duration Legal basis Mainly affects
Tax limitation period 4 years Ley 58/2003 (LGT), Art. 66 All taxpayers: Renta, IRNR, wealth tax
Commercial-law retention 6 years Código de Comercio, Art. 30 Business owners, self-employed people, companies
Right of review for carried-forward losses and deductions 10 years LGT, Art. 66 bis Anyone offsetting losses or deductions over several years

Note: These three deadlines don't rule each other out. An autónomo with carried-forward losses may need to keep an eye on all three clocks at once – for different documents.

Four years: the tax limitation period under Art. 66 LGT

The basic rule is set out in Article 66 of the Ley General Tributaria: after four years, the authorities' right to assess a tax debt or demand its payment lapses. At the same time, however, your own right to claim a refund also lapses. This is the point many people overlook – the deadline doesn't just protect you against back payments, it also limits how long you yourself can still claim money back.

For more on the mechanics of the limitation period itself, including the question of when a tax debt is actually considered extinguished, see the guide Tax limitation periods in Spain.

Subject of limitation Time limit
The administration's right to assess a tax debt 4 years
The administration's right to collect assessed tax debts 4 years
Your right to a refund of overpaid tax 4 years

When does the time limit actually start running?

The start of the time limit is a frequent stumbling block, because it doesn't coincide with the tax year itself but with the end of the relevant filing deadline. For example, if you file your Renta for a given year, the limitation clock generally only starts ticking once the filing deadline for that year has expired – not on 1 January or 31 December of the tax year itself. For the ten-year review period applicable to loss carryforwards, this is explicitly set out in the wording of the law; the same logic applies to the four-year period.

For business owners, the commercial-law clock ticks differently: it only starts with the last entry in the relevant books, not with the end of the financial year.

Type of time limit Start of the time limit
Tax limitation period (4 years) Generally from the end of the filing deadline for the respective return
Right of review for loss carryforwards (10 years) From the day after the filing deadline expires for the year in which the loss or deduction arose
Commercial-law obligation (6 years) From the last entry in the business books

Note: Don't calculate specific calendar dates yourself if you're unsure. The precise calculation of time limits in individual cases – for example, with subsequently corrected returns – should be left in the hands of a tax adviser for expats.

What interrupts the limitation period – and why that matters

The four-year period doesn't simply run undisturbed. Article 68 LGT lists several events that interrupt it, including any formal action by the tax administration that you become aware of, as well as – in the case of refund claims – demonstrable actions on your own part and the filing or processing of appeals. The crucial point here: An interrupted time limit starts running completely afresh.

In practice, this means: anyone who thinks "my return from four years ago is surely long since settled" could be mistaken if, in the meantime, a letter from Hacienda or an appeal of their own has reset the clock. So keep all correspondence with the tax administration until you're certain that there are genuinely no more open matters running for the year in question.

Six years: the commercial-law obligation for business owners and the self-employed

Anyone running a business in Spain – as an autónomo, as a shareholder of an SL, or as a self-employed professional subject to bookkeeping obligations – cannot rely on the four-year rule that applies to private individuals. Article 30 of the Código de Comercio requires business owners to keep books, correspondence, receipts and other documents relating to their business in an orderly manner for six years, calculated from the date of the last entry in the respective books.

The second paragraph of this provision is often overlooked in practice, yet it is the most important sentence for anyone ending their self-employment or dissolving a company: ceasing the activity does not release you from the obligation to retain records. If the business owner dies, the obligation passes to their heirs; if a company is dissolved, the liquidators bear responsibility.

Situation Who is obliged to retain the records?
Autónomo ends their activity The former autónomo themselves, for the full 6 years from the last entry
Autónomo passes away Their heirs
SL is dissolved The company's liquidators

If you're ending self-employment in Spain or closing a company, it's worth taking a look at the guides Autónomo Spain, Bookkeeping for Autónomos and Dissolving an SL in Spain – they also describe which formalities arise when ending the activity.

Ten years: loss carryforwards, deductions – and the trap of "time-barred" years

The truly most surprising rule is found in Article 66 bis LGT, introduced by Ley 34/2015. It states that if you carry forward losses or deductions from a particular year into later years that are not yet time-barred, the tax authorities can still examine the original year for ten years, calculated from the day after the filing deadline for the year in which the loss or deduction arose.

Even more important is an addition to the same provision: even if a year is already time-barred for tax purposes, the obligation remains to produce the tax returns and bookkeeping records from that year as soon as they affect a non-time-barred year – for example, because they are the source of a loss or deduction that was later offset.

Note: "Time-barred" in Spain does not automatically mean "may be destroyed". If a tax position from an old year has an effect on a current year, you may still be obliged to produce the underlying documents.

The special case of real estate: why purchase documents must be kept for much longer

For owners in Mallorca, this is the practically most important consequence of Article 66 bis: the purchase documents of a property – the notarial deed of purchase, receipts for incidental costs, renovation invoices with tax relevance – determine the acquisition value from which the capital gain is later calculated, which is taxed on sale as part of income tax or non-resident tax. However, the limitation period for this item only starts running with the year of sale, not with the year of purchase.

This gives a simple rule of thumb for practice: You should keep the purchase documents of a property for as long as you own the property – and then for a further period corresponding to the applicable limitation period. It's best to set up a dedicated folder for this, in which the notarial deed of purchase, receipts for value-increasing renovations and the incidental cost receipts relating to the purchase are kept together – not sorted by individual deadlines, but as a complete package that you only dispose of after the sale of the property and the expiry of the then-applicable limitation period. Anyone who disposes of these documents ten or fifteen years after the purchase because "the four years are surely long over" will no longer be able to prove the value basis on a later sale and risks a less favourable calculation of the capital gain.

Inheritance cases: when you take over a box of documents

Anyone who inherits a flat, an account or even just a file folder in certain cases also takes over the deceased's record-keeping obligation – especially if the deceased was engaged in business activity. This follows directly from Article 30 paragraph 2 of the Código de Comercio. If you are currently dealing with an inheritance from Germany or Spain, it's worth also taking a look at the guide Taxing an inheritance from Germany and Spain – that guide covers the tax side, while here the focus is on the documentation obligation.

How to proceed if documents from an older year are requested

  1. First check which year the requested documents come from and whether that year should already be closed after the four or six years.
  2. Clarify whether there is a link to a year that is not yet time-barred – for example through a loss carryforward, a deduction or a later sale.
  3. Respond to every request from the authorities within the deadline; silence can be treated as a failure to produce the documents.
  4. If in doubt, consult a tax adviser or a gestoría before classifying documents as "no longer relevant".
  5. Keep a copy of all correspondence with the Agencia Tributaria – it can itself become a document relevant to deadlines.

Digital backup as a supplement, not a replacement

It makes sense to additionally back up important documents digitally – for example, scanned and stored in a cloud or on an external hard drive, separate from the paper original. This protects against water damage, house moves and loss. Whether a digital copy can fully replace a paper original in a dispute is a question of digital archiving that cannot be conclusively answered here – so don't rely solely on the scan, but keep originals wherever practicable.

Most common mistakes

  • Throwing everything away after four years. Anyone with loss carryforwards, deductions or a property is often subject to additional, longer deadlines.
  • Confusing the end of business activity with the end of the retention obligation. The six-year obligation under Art. 30 Código de Comercio continues to run – if necessary, with the heirs.
  • Disposing of the property's purchase documents too early. They only become relevant again when the property is sold.
  • Not keeping correspondence with the Hacienda. It may have interrupted the limitation period without you noticing.
  • Relying on a single, undifferentiated deadline. Private individuals, self-employed people and business owners with a loss carryforward are subject to different clocks – often simultaneously.

What comes next?

As soon as a deadline for a particular item has genuinely expired and there is no connection to a year that is still open, you can sort out the relevant documents. It makes sense to do this not all at once, but category by category: first the purely everyday receipts with no connection to property or business, and only afterwards – with greater caution – anything related to assets, companies or loss carryforwards. If in doubt, it's worth a quick check with a gestoría or a tax adviser before shredding anything; the directory Law & Finance helps you find suitable contacts in Mallorca.

Checklist: What stays, what can go?

Question Consequence
Does the document concern a year that has not yet reached its limitation period? Keep
Are you carrying forward a loss or deduction from it into a current year? Keep until that year itself reaches its limitation period
Are you or were you a business owner/autónomo, and is the last booking less than 6 years old? Keep
Is it purchase documentation for a property you still own? Keep until sale plus the limitation period
Is there still an ongoing procedure, an objection or correspondence with the Hacienda regarding this item? Keep it, the deadline might be interrupted

Conclusion

The Spanish retention logic is more complicated than the German rule of thumb, but at its core easy to remember: four years for the normal tax limitation period, six years for business owners under commercial law, ten years as soon as loss carryforwards or deductions are involved – and a special rule for real estate, which in practice means: for as long as you own it, plus the respective limitation period afterwards. Anyone who knows these three clocks and consistently keeps correspondence with the Hacienda can safely declutter without later worrying about missing evidence. If in doubt, it's always worth a quick chat with a tax advisor before shredding anything.

Official sources

How long do I have to keep my tax documents in Spain at a minimum?
As a private individual, the four-year tax limitation period under Art. 66 LGT generally applies. Entrepreneurs and self-employed persons must additionally observe the six-year period under the Código de Comercio.
Why does a longer period apply to entrepreneurs than to private individuals?
Commercial law (Art. 30 Código de Comercio) requires entrepreneurs to keep their business records in an orderly manner for six years, independently of the purely tax-related limitation period of four years.
When does the period start running?
For the tax limitation period, generally from the end of the filing deadline for the respective return, and for the commercial-law period, from the last entry in the business books. The tax year itself is not the starting point.
Can I really throw everything away after four years?
No. If an item from an earlier year affects a year that has not yet lapsed — for example through a loss carryforward or a deduction — the tax authorities can, under Art. 66 bis LGT, demand documents from the original year for up to ten years.
How long do I have to keep documents relating to my property?
In practice, it is advisable to keep the purchase deed and any receipts relevant to value for as long as you own the property, and afterwards for the duration of the applicable limitation period — since they determine the acquisition value for the later calculation of the capital gain.
What happens to the record-keeping obligation if I stop being self-employed?
The obligation does not end with the cessation of business. It continues unchanged under the Código de Comercio and passes to the heirs in the event of death.
Who must keep the records of a dissolved company?
In the case of a dissolved company, the liquidators are responsible for the continued retention of the business records.
Is a scanned copy sufficient as a substitute for the paper original?
This is a question of digital archiving that cannot be conclusively addressed here. It is sensible to additionally back up important originals digitally, without relying solely on the scan.