Documents Required to Claim Deductible Expenses on Form 210

To claim deductible expenses on Form 210 it is not enough to say expenses have been incurred. They must be properly documented, linked to the rented property and justified for the declared period.

Documentation is an essential part of the file. A claim that is documentarily weak can end up in a request for additional information, denial or unnecessary delays.

Why documentation is so important

Under NRIT, non-residents are taxed on income earned in Spain. The NRIT Law regulates the tax base and establishes specific rules for EU/EEA residents regarding the deduction of expenses directly linked to income earned in Spain.

When seeking to deduct expenses or request rectification of Form 210 returns already filed, the practical burden of proof falls on the taxpayer. Therefore, before claiming, it is advisable to organise the file properly.

1. Form 210 returns already filed

The first documentary block is the declarations already filed.

You should provide: copy of each Form 210; proof of submission; NRC or proof of payment; year and period declared; type of income declared; amount paid.

Without these documents it is impossible to know exactly what was declared or what amount could be rectified. If any return was filed late, the surcharge or regularisation applied must also be identified.

2. Property documentation

The property must also be correctly identified.

Useful documents: deed of purchase; nota simple, if applicable; IBI receipt; cadastral reference; cadastral certificate; ownership percentage; date of acquisition; acquisition value; breakdown of land and building values, when necessary.

This point is especially relevant for calculating depreciation.

3. Rental income receipts

To review rental taxation, income must be documented.

Acceptable documents: lease agreement; invoices issued, if any; bank statements; platform settlements; real estate agency certificates; annual summary of rents collected.

It is important to distinguish between gross rent, commissions deducted by platforms and amounts actually received.

4. Property-related expenses

Expenses must be documented and related to the rental.

IBI

Annual receipt of the Property Tax (IBI) and proof of payment.

Homeowners' association fees

Monthly receipts or certificate/summary from the administrator.

Insurance

Policy and receipt for home insurance or insurance linked to the property.

Repairs and maintenance

Complete invoices. It is important to differentiate deductible repairs from improvements or extensions.

Financing interest

Bank certificate with breakdown of interest, not just the total mortgage instalment.

Agency or rental management

Invoices for agency, administration, rental-related cleaning or booking management.

5. Tax residency certificate

The tax residency certificate is especially important to prove the taxpayer's country of residence.

It must be issued by the tax authority of the corresponding country and refer to the affected year or relevant period.

Tax residence may affect the rate applicable, the treatment of expenses and the application of Double Taxation Treaties. Article 4 of the NRIT Law states that the law applies without prejudice to international treaties and conventions incorporated into the domestic legal system.

6. Bank details for refund

If the claim succeeds, the Administration will need a valid bank account to process the refund.

You should review: account ownership; IBAN; country of the bank; consistency with the taxpayer; bank documentation if requested.

Common mistakes

The most common errors are: sending receipts instead of invoices; not proving payment; mixing personal expenses with property expenses; deducting expenses for non-rental periods; not justifying tax residence; not providing the original Form 210 returns; calculating depreciation on the total value without excluding land.

Conclusion

A claim for deductible expenses on Form 210 must be prepared as an evidentiary file, not as a simple generic request.

At Spain Tax Experts we review documentation, calculate the estimated refund and assess whether there is sufficient technical basis to request rectification of previous declarations.