Does asking for a receipt pay off?
Rent and IRS return calculator
What Portuguese income tax refunds to a tenant who pays rent with a receipt, and what that saving is worth after 12 months, or 10 years, if it is put to work.
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Renting without issuing receipts and without registering the lease with the Tax Authority (Autoridade Tributária) is illegal in Portugal: it is a tax offence subject to fines and penalties.
The rent
What you pay, and what IRS gives back if the landlord issues a receipt.
What you pay your landlord each month.
Deduction ceiling: €900.00 a year. Not yet confirmed in the legislation: it comes from the press and Doutor Finanças, checked on 7 October 2026. Confirm on the Portal das Finanças.
Tick if the household's taxable income (income after deductions and allowances, not gross salary) is at most 8,059 € a year (the 2025 figure). The ceiling becomes 1,100 €. Above that it falls gradually to the general ceiling, which this calculator does not model.
Leaves your account every month
€440.00 / month
- You recover through IRS
- €66.00 a month
- Net rent
- €374.00 a month
- Deduction per year
- €792.00 a year
15% of €5,280.00 is €792.00, within the ceiling of €900.00.
What the rent costs, per month
- paid
- recovered through IRS (€66.00)
For the same net rent, a rent with no receipt would have to be €66.00 a month lower.
The saving
The same money, set aside every month, against waiting for the refund.
After 1 year
You would have this much more
€7.23
if you set €66.00 aside every month, at 2% a year, instead of waiting for the IRS deduction
- No receipt, with €66.00 set aside a month
- €799.23of which €7.23 is interest
- With a receipt, with €792.00 refunded a year
- €792.00of which €0.00 is interest
On each refund day
- With a receipt (refund)
- No receipt (set aside)
- + difference
An illustration, not investment advice. Compound interest on both sides: the money set aside earns every month, and each refund, from the day it arrives, earns the same rate until the next one lands, interest on interest. The rate is the effective yearly rate. Only the rent of the year each refund is for is counted, and the wait between the end of the year and the refund is left out: it is an estimate. Tax on the interest is left out.
How it is calculated
- A tenant deducts 15% of the rent paid in the year from the IRS due (a deduction from the tax itself), up to a yearly ceiling. The deduction never exceeds the tax assessed.
- It only counts with a lease communicated to the Tax Authority and electronic rent receipts, for a permanent home.
- The general ceiling is 700 € for rent paid in 2025. For 2026 and 2027 the figures used here (900 € and 1,000 €) are estimates: they come from DECO PROTESTE, Doutor Finanças and ECO (checked on 7 October 2026), and the exact legislation has not been confirmed. Confirm them on the Portal das Finanças before deciding. Lower incomes (first IRS bracket) get a higher ceiling, up to 1,100 €: there is an option for it, but the middle stretch, where the ceiling falls gradually, is not calculated.
- The deduction arrives in the IRS refund, not every month. Returns are filed from 1 April to 30 June; the refund usually lands 3 to 12 weeks later (earlier for those who file early, and with the automatic return) and the legal deadline is 31 August. The comparison in step 2 leaves out the wait between the end of the year and the refund: it is an estimate, and everyone is paid on a different date. The "Today" option counts only the months left in the year.
- Without a receipt there is no deduction. Undeclared rent is an offence by the landlord, and the tenant is left without proof of the tenancy. The tool compares numbers; it is not tax advice.