Affordable rent · RSAA
Affordable rent in Castro Marim: RSAA rent ceilings
Under the RSAA, the monthly rent in Castro Marim cannot exceed €378 for a T0, €531 for a T1, €671 for a T2 or €784 for a T3. In return, the rent is exempt from IRS.
- Official source: Diário da República
- Portaria n.º 454/2026/1
- Data of 22 October 2026
Key figures
Monthly ceilings in Castro Marim
The T2 ceiling ranks 49th highest of 308 municipalities and 12th of 16 in the Faro district.
- T0, maximum rent per month
- €378
- T1, maximum rent per month
- €531
- T2, maximum rent per month
- €671
- T3, maximum rent per month
- €784
Simulator
Work out the ceiling for your property
The ceilings
Rent ceilings by size in Castro Marim
| Size | Ceiling | +10% parking | +10% class A or A+ | +20% both |
|---|---|---|---|---|
| T0 | €378 | €415.80 | €415.80 | €453.60 |
| T1 | €531 | €584.10 | €584.10 | €637.20 |
| T2 | €671 | €738.10 | €738.10 | €805.20 |
| T3 | €784 | €862.40 | €862.40 | €940.80 |
| T4 | €895 | €984.50 | €984.50 | €1,074 |
| T5 | €996 | €1,095.60 | €1,095.60 | €1,195.20 |
Cumulative uplifts (art. 2(4)). Above T5, add €75 per bedroom beyond the fifth: a T6 has a ceiling of €1,071.
The ceiling against the Castro Marim market
The T2 ceiling (€671) is 3% below the market estimate: letting at the ceiling costs the landlord about €24 a month. The quartiles of the T2 estimate run from €465 to €970: the ceiling sits between the 1st quartile and the median. With private parking and class A or A+, the T2 ceiling rises to €805.20 and covers the estimate.
| Size | RSAA ceiling (€/month) | Market est. (€/month) | Difference | Ceiling (€/m²) | Market (€/m²) |
|---|---|---|---|---|---|
| T1 · 48 m² | 531 | 495 | +7 % | 11.06 | 10.31 |
| T2 · 85 m² | 671 | 695 | −3 % | 7.89 | 8.18 |
| T3 · 115 m² | 784 | 810 | −3 % | 6.82 | 7.04 |
Aluseg estimate, not an official figure: INE median of €8.59/m² (2025, 66 new leases) × INE size ratio for Algarve × reference floor area. See the Castro Marim rental market.
The ceiling against income in Castro Marim
A person on the median income in Castro Marim receives €963 a month after income tax (INE, 2024). The T2 ceiling (€671) takes 70 % of that income, against 72 % for the market rent (€695). For a couple on two median incomes, 35 % against 36 %.
Income per person after income tax, not household income: see how we read this number.
Looking for an affordable-rent home in Castro Marim?
Ask the landlord whether the lease will be in the RSAA (they file it with the IHRU, art. 6) and check the advert: up to €531 for a T1, €671 for a T2.
IRS saved at the ceiling in Castro Marim
A T2 in Castro Marim let at the ceiling earns €8,052 a year. Outside the RSAA, IRS on that gross rent would reach €2,013 (25% rate) or €805.20 (10% rate, for rents up to €2,300 a month). Under the RSAA, the tax is €0.
| Size | Rent at the ceiling (€/month) | Rent per year (€) | IRS at 25% (€/year) | IRS at 10% (€/year) | IRS under the RSAA (€/year) |
|---|---|---|---|---|---|
| T0 | 378 | 4,536 | 1,134 | 453.60 | 0 |
| T1 | 531 | 6,372 | 1,593 | 637.20 | 0 |
| T2 | 671 | 8,052 | 2,013 | 805.20 | 0 |
| T3 | 784 | 9,408 | 2,352 | 940.80 | 0 |
| T4 | 895 | 10,740 | 2,685 | 1,074 | 0 |
| T5 | 996 | 11,952 | 2,988 | 1,195.20 | 0 |
Gross rent, no deductible expenses. Exemption: art. 6 of annex III. Rates: Landlord IRS in 2026.
Ceilings in the Faro district
Castro Marim has the 12th highest T2 ceiling of 16 municipalities in the Faro district. The highest is Albufeira (€923) and the lowest is São Brás de Alportel (€526). The district median is €752.50: Castro Marim is 11% below the median.
| Municipality | T0 (€/month) | T1 (€/month) | T2 (€/month) | T3 (€/month) | T2 market, est. (€/month) | Difference |
|---|---|---|---|---|---|---|
| Albufeira | 554 | 709 | 923 | 1,136 | 925 | 0 % |
| Loulé | 550 | 704 | 917 | 1,129 | 965 | −5 % |
| Lagos | 547 | 701 | 912 | 1,123 | 1,000 | −9 % |
| Portimão | 530 | 679 | 883 | 1,088 | 920 | −4 % |
| Tavira | 521 | 671 | 868 | 1,069 | 910 | −5 % |
| Vila Real de Santo António | 448 | 671 | 866 | 1,034 | 770 | +12 % |
| Alcoutim | 488 | 625 | 814 | 1,002 | – | – |
| Lagoa | 456 | 584 | 760 | 936 | 760 | 0 % |
| Faro | 447 | 572 | 745 | 917 | 780 | −4 % |
| Silves | 444 | 568 | 739 | 911 | 750 | −1 % |
| Vila do Bispo | 421 | 539 | 701 | 864 | 720 | −3 % |
| Aljezur | 384 | 531 | 671 | 788 | 630 | +7 % |
| Castro Marim | 378 | 531 | 671 | 784 | 695 | −3 % |
| Monchique | 364 | 531 | 671 | 784 | 605 | +11 % |
| Olhão | 394 | 531 | 671 | 810 | 685 | −2 % |
| São Brás de Alportel | 316 | 404 | 526 | 648 | 580 | −9 % |
From the highest T2 ceiling to the lowest. Market: Aluseg estimate from INE data; – = no data.
Rent under the RSAA with everything in order
Lease, Tax Authority and rent receipts in a free account.
FAQ: affordable rent in Castro Marim
What is the maximum rent for a T2 in Castro Marim under the RSAA?
€671 a month, the 49th highest ceiling in the country. With private parking or an energy certificate of A or A+ it rises to €738.10; with both, to €805.20.
Is the T2 ceiling in Castro Marim above or below the market rent?
It is 3% below the Aluseg estimate for an 85 m² T2, about €695 a month (INE, 2025).
How do I get the IRS exemption?
Report the lease to the Tax Authority and file it with the IHRU by 15 January of the following year. See the RSAA guide.
What if the rent goes over the ceiling?
The exemption is lost from the breach and the tax is settled with compensatory interest (art. 7 of annex III).
Sources and methodology
Source: Portaria n.º 454/2026/1, de 13 de outubro (PDF) and Decree-Law 97/2026, annex III, read on 22 October 2026. Uplifts calculated by us (art. 2(4)). For information only, not legal or tax advice.