AI agents for business finance: what they can and can't do
What AI agents can do in bookkeeping, close, collections and compliance today, where a person must stay in charge, and how to judge a product.
The short answer
Yes. Spain's wealth tax law (Ley 19/1991, art. 5) taxes residents on their whole net wealth, wherever the assets are, so land or a house in Nigeria counts. Most people pay nothing because of the allowances: the regional exempt minimum (€700,000 where the region has not set its own) and up to €300,000 for your main home, assessed on wealth held on 31 December.
The Impuesto sobre el Patrimonio is an annual tax on what you own minus what you owe. It is a state tax whose allowances, rates and reliefs have been largely handed to the autonomous communities, which is why the same assets can be taxed differently in Madrid, Catalonia or Andalucía.
Who is caught and what counts
Article 5 of Ley 19/1991 says residents are taxed on "la totalidad de su patrimonio neto", their entire net wealth, whatever its location. Non-residents are taxed only on assets in Spain. If you are tax resident in Spain, your Nigerian assets are in scope:
- Land and buildings in Nigeria, including a family house in your name.
- Nigerian bank balances and fixed deposits.
- Shares held through CSCS, mutual fund units and government securities.
- Your share of jointly owned property.
Debts reduce the figure, so a loan secured on the Nigerian property generally comes off. The tax is assessed on what you hold on 31 December each year (art. 29).
The allowances most people stay under
| Allowance (Ley 19/1991) | Amount | Note |
|---|---|---|
| Main home exemption (art. 4.9) | Up to €300,000 | Your habitual residence, usually your Spanish home |
| Exempt minimum (art. 28) | Set by your region; €700,000 if it has not set one | Deducted from the taxable base |
| State rate scale (art. 30) | 0.2% to 3.5% | Used only where the region has no scale of its own |
| Cap with income tax (art. 31) | Income tax plus wealth tax capped at 60% of income tax bases | Excess reduces wealth tax, by at most 80% |
Regions can also give reliefs on the tax due. Check your region's current rules on the Agencia Tributaria site or with a gestor, because they change with regional budgets. Spain has also had separate measures on large fortunes; ask whether any apply to you.
How Nigerian property is valued
For real estate, article 10 uses the highest of three values: the cadastral value, the value set or checked by the administration for other taxes, and the purchase price. Nigerian property has no Spanish cadastral value, so in practice the purchase price or a documented value tends to drive the figure. Keep the deed, the receipts and the exchange rate you used. Get an adviser's view on whether a recent professional valuation should be used.
A worked example
Example only, with an illustrative rate of €1 = ₦1,700. Ada lives in a region using the state defaults.
| Asset | Value |
|---|---|
| Flat in Spain (main home) | €250,000 |
| Plot in Lagos bought for ₦60,000,000 | €35,294 |
| Savings in Spain and Nigeria | €40,000 |
| Total net wealth | €325,294 |
| Less main home exemption | −€250,000 |
| Taxable base before exempt minimum | €75,294 |
| Less exempt minimum | −€700,000 |
| Wealth tax due | €0 |
Ada pays nothing. Someone with several Nigerian properties, a large share portfolio and a Spanish home could pass the thresholds, and should check both the tax and any filing duty, which has its own rules.
Mistakes Nigerian residents of Spain make
- Assuming foreign assets are invisible. Article 5 makes no distinction by location for residents. Nigeria carries out reciprocal exchanges of financial account information under the common reporting standard (ICTD, May 2026), so records do travel.
- Counting the house at home as "family property". If the title is in your name, it is your asset for the tax, even if your parents live in it. If it is in a parent's name, it is theirs.
- Using today's rate for an old purchase. The value you use and the rate you convert at should be documented and consistent from year to year.
- Forgetting debts. A loan used to buy or build the Nigerian property can reduce net wealth; keep the loan statement.
- Assuming the regional rules are the same everywhere. Moving from one region to another can change the outcome even with the same assets.
What to check first
- Confirm you are tax resident in Spain: the residence tests.
- List every Nigerian asset at its 31 December value, with documents.
- Check your region's exempt minimum, rates and reliefs.
- Check whether you must also report foreign assets on Spain's information return: Modelo 720 and Nigerian investments.
- Remember the Nigerian side: Lagos charges an annual Land Use Charge to property owners, not tenants (2026 bills issued in March 2026). It is a property charge in Nigeria, separate from Spanish wealth tax.
This is information, not tax advice.
Where Pryme fits
Clear records make a wealth tax check easier. A Pryme account holds naira and euros side by side, and you can produce a verifiable statement with VerifyDoc.ai showing the 31 December balance for your adviser. Rent from a Lagos property can be received in naira: see receiving Lagos rent while living in Spain.
Questions people ask
Does Spain's wealth tax include property abroad?
For residents, yes. Ley 19/1991 article 5 taxes residents on their whole net wealth wherever it is located.
What is the wealth tax allowance in Spain?
The exempt minimum is set by each region, or €700,000 if the region has not set one, plus up to €300,000 for your main home.
How is my house in Nigeria valued for Spanish wealth tax?
Article 10 uses the highest of cadastral value, an administratively checked value and the purchase price. Keep your deed and receipts.
Do I need to declare Nigerian property even if I pay no wealth tax?
Possibly, under Spain's foreign asset reporting rules, which are separate. Check the thresholds with a gestor.
Sources
- BOE: Ley 19/1991, del Impuesto sobre el Patrimonio (consolidated text, last update 28 Dec 2023) · accessed Oct 2026
- The Nigeria Lawyer: Landlords, not tenants, must pay Land Use Charge; 2026 bills issued, 5 Mar 2026 · accessed Oct 2026
- ICTD Working Paper 240: Evaluating Nigeria's implementation of tax standards for exchange of information, 21 May 2026 · accessed Oct 2026
This article is general information, not financial, legal or tax advice. Products described are provided under the terms on this site and are subject to regulation and eligibility.