Double taxation in Spain: what Czech and Polish owners actually owe
In 30 seconds
Spain taxes your rental income, your sale, and your inheritance first, simply because the property sits in Spain. For rental income and a sale, treaties then stop you being taxed twice. For inheritance, no such treaty exists.
Which country taxes your Spanish property first?
One rule makes the rest of this simpler. For real estate, both the Czech-Spain and the Poland-Spain tax treaties, like almost every tax treaty in the world, give the country where the property actually sits the first right to tax income and gains from it. Spain taxes Spanish rental income, a Spanish sale, and a Spanish inheritance first, regardless of where you live.Your home country, Czechia or Poland, then has to deal with that already-taxed income when you report your worldwide income at home. That is where the treaty mechanics, a credit against what you already paid, actually matter, and where the two systems genuinely differ from each other, as the sections below set out.
How is your rental income taxed, on both sides?
As a non-resident owner, you are taxed under IRNR, the non-resident income tax, filed on Modelo 210. As an EU/EEA resident, that covers both a Czech and a Polish owner, the rate is 19% on your NET rental income: mortgage interest, repairs, management fees, IBI and building insurance are all deductible before that rate applies. The filing window for a given year's rental income is 1 to 20 January of the following year.If you do NOT rent the property out, Spain still taxes it. A notional "deemed income" rule applies simply because the property is available for your own use, taxed annually at the same 19% rate, again on Modelo 210. This catches out a genuine assumption: not renting the property does not mean there is no Spanish tax to think about.
On the home side, a Polish tax resident declares that Spanish rental income as part of worldwide income, and then claims relief for the Spanish tax already paid against the Polish liability on the same income, a credit-style mechanism confirmed directly at source. A Czech tax resident is taxed on worldwide income too, and treaty relief for foreign-source income exists, but which specific method, a credit or an exemption, the Czech-Spain treaty applies to rental income from real estate was not confirmed in this pass. State it to a Czech owner as "relief exists, the exact mechanism needs your own accountant to confirm" rather than as a settled fact either way.This page states the rate only far enough to show the treaty mechanic. The exact rate table, the imputed-income base and the full filing calendar are the entire subject of a separate guide.
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If I never rent the property out, do I still need to file anything in Spain?Yes. The deemed-income rule applies whether or not you actually rent it out, and it is filed the same way, on Modelo 210, at the same 19% rate for an EU/EEA resident. Skipping this because the property sits empty is a genuine, common mistake.
What happens to the tax bill when you sell?
As an EU/EEA resident, both a Czech and a Polish seller are taxed at 19% on the capital gain, the sale price minus the acquisition cost and allowable costs. Sources differ on whether this 19% rate is now flat for all non-residents or still sits alongside a higher non-EU rate in some framings; either way, a Czech or Polish seller, as an EU citizen, lands at 19%, and that is the figure worth relying on.On completion, the buyer is legally required to withhold 3% of the sale price and pay it directly to the Spanish tax office within 30 days, as a guarantee against your eventual capital gains bill. This directly affects what actually lands in your account at the notary, not just your eventual tax bill, and it is worth knowing before you agree a sale price.
| Step | What happens | Where it is set out |
|---|---|---|
| At the notary, on completion | The buyer withholds 3% of the sale price and pays it to the tax office, within 30 days. | Modelo 211 |
| Afterwards, your own filing | You file your own capital gains return. If 19% of the real gain is less than the 3% withheld, you claim back the difference. If it is more, you pay the balance. | Modelo 210 |
| At home, on your annual return | Poland: you declare the gain and claim credit for the Spanish tax already paid, the same worldwide-income mechanism as rental income. Czechia: you declare the gain and treaty relief exists, but the specific method for this particular treaty was not confirmed in this pass. | Home-country tax return |
Is there a treaty that stops your heirs being taxed twice?
No. This is the single most important fact on this page, and it surprises most Czech and Polish buyers: Spain has NOT signed an inheritance-tax treaty with either Czechia or Poland. Spain's inheritance-tax treaty network covers only three countries: France, Greece and Sweden.The income and capital-gains treaty relief described above does not extend to inheritance at all. A Czech or Polish heir inheriting your Spanish property is taxed by Spain on the Spanish asset regardless, under the regional rules of wherever the property sits, and separately, Czechia or Poland may apply their own domestic succession-tax rules to the very same inheritance, with no bilateral mechanism designed to stop it being taxed twice.
| Relief | What it does | Condition |
|---|---|---|
| Kinship reduction, Groups I-II | Reduces the taxable value of the inheritance by up to 1.000.000 EUR. | Spouse, children, grandchildren, parents or grandparents. |
| Habitual-residence reduction | A flat 99% reduction on the value of the deceased's own home, with no cap. | Only if the property was the deceased's habitual residence, and the heir keeps it for the following three years. |
| 99% quota bonification | Cuts the tax otherwise due, after the reductions above, by 99%. | Applies to Groups I-II, under Andalusia's own regional law. |
One EU-level rule matters here for a different reason: EU Succession Regulation 650/2012 decides which country's SUCCESSION LAW, not tax law, governs how your estate is legally distributed, and it can matter for the paperwork. It does not itself prevent double taxation, and it is a separate question from everything above.The full Spanish inheritance-tax process, the filing deadline, the choice-of-law question and the worked figures, is the entire subject of a separate guide. What this page adds is the one fact that guide does not cover: the treaty gap itself, and why it means the relief above is unilateral and Spain-side only.
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So could my heirs really be taxed by both Spain and Czechia or Poland on the same property?That is the honest, unresolved risk. Spain will tax the inheritance on its own side, using the regional relief above. Whether Czechia or Poland then taxes the same inheritance again, and whether either country has its own unilateral relief for foreign inheritance tax already paid, was not something this research confirmed for either country. It needs a named succession-tax specialist in your own country, not a guess.
What does filing actually involve, every year?
A Czech or Polish owner with Spanish rental income or a Spanish sale genuinely has TWO tax filings to think about, not one automatically-reconciled process. The Spanish side, Modelo 210 for rental or deemed income, and separately for a sale, plus the notary's 3% retention paperwork. The home-country side, your usual annual return, which must include the same Spanish-sourced income or gain, with the treaty credit actively claimed there.Neither side does this for you. Spain does not automatically tell the Czech or Polish tax authority what you paid, and your home-country return does not automatically know about it either. You, or your accountant, have to claim the relief yourself, on both sides, every year it applies.
This is exactly the kind of two-country coordination a Spanish gestor working alongside your own home-country accountant exists to manage, rather than something to piece together from two sets of paperwork in two languages on your own.
What to have in place before your Spanish property creates two tax bills
Five items, gathered before the first rental payment or the first sale, rather than discovered at a filing deadline.| Have in place | Why it matters | What a bad answer looks like |
|---|---|---|
| A named accountant on the Spanish side, filing Modelo 210 for you | The 19% net rate depends on claiming real deductible expenses; missing them means overpaying. | Filing it yourself once and hoping the same approach works every year. |
| A named accountant or tax adviser at home, for the same income or gain | The treaty credit is not automatic; you have to actively claim it on your home return. | Assuming Spain and your home country reconcile the tax between themselves. |
| A clear answer on whether the property counts as rented out or left empty | Both are taxed in Spain, at the same rate, but under different rules and different filings. | "We don't really rent it, so there's nothing to file" is the exact assumption that is wrong. |
| A note of the 1 to 20 January filing window for the previous year's rental income | Missing it is a compliance failure, not a minor delay. | Finding out about the deadline after it has passed. |
| Early advice on succession planning, given the treaty gap above | There is no bilateral fix for inheritance tax, so the planning has to happen in advance, not after a death. | Leaving it until the moment it actually matters, when nothing can be planned any more. |
What is genuinely unresolved here
This is general orientation as of 21 August 2026, not tax advice on your own situation. It rests on a capped research pass with named sources per section above, and several real gaps are stated plainly rather than guessed at.The Czech-Spain treaty's own relief method, credit or exemption, for rental income and capital gains was not confirmed against the treaty text itself in this pass. It needs a direct read of the treaty, or a Czech tax adviser, before anyone states it as settled either way.The exact mechanism for evidencing Spanish tax already paid, when claiming home-country credit relief, a certificate versus a Modelo 210 receipt, was not confirmed for either country. Neither was whether Czechia or Poland has its own domestic threshold that triggers a separate foreign-asset disclosure obligation, which is a different question from the income or gain itself.Above all: neither Czechia's nor Poland's own domestic unilateral relief provisions for foreign inheritance tax already paid were researched in this pass. Given there is no treaty at all for inheritance, this is the single gap most worth closing with a named specialist before any buyer relies on either country's protection.
Most common questions about double taxation
- Does living in Czechia or Poland instead of Spain change any of the Spanish-side rates?
- No. Spain taxes the property because the property is in Spain, at the same rate for any EU/EEA resident regardless of which EU country they live in. What changes between a Czech and a Polish owner is what happens next, on the home side, not what Spain itself charges.
- If I already pay tax in Spain, do I still need to declare the same income at home?
- Yes. Both Czechia and Poland tax their residents on worldwide income, so the same Spanish-sourced income or gain has to appear on your home return too. The treaty exists precisely so you get credit there for the Spanish tax already paid, but only if you actually claim it.
- Is the 3% withheld at sale the same as my final capital gains tax?
- No, and treating it that way is a common mistake. It is a guarantee, withheld against your eventual bill. You file your own return afterwards: if the real 19% gain is less than what was withheld, you claim the difference back; if it is more, you pay the rest.
- Can a Spanish will avoid the inheritance double-taxation problem?
- A Spanish will helps your family avoid months of extra paperwork after a death, and lets you choose which country's succession law governs the estate. It does not, on its own, solve the tax question above: there is no treaty either way, so the tax exposure on both sides needs its own separate advice, will or no will.
