Got a rent hike letter? Is it legal in 2026?

3 November 2026

From 1 March 2026, private rent increases in Ireland are capped nationwide at the lower of 2% a year or Consumer Price Index (CPI) inflation, and a landlord may usually review rent only once every 12 months. A valid Notice of Rent Review must use the Residential Tenancies Board (RTB) prescribed form, give at least 90 days written notice, and be copied to the RTB within 7 days of service on the tenant. Informal texts, WhatsApp messages, or emails that are not the prescribed form do not create a lawful rent increase.

What changed in March 2026

Ireland replaced local Rent Pressure Zones with a national system of rent control for private tenancies and Student Specific Accommodation. The rules apply nationwide, including Dublin, Cork, Galway, Limerick, and commuter towns.

For most private tenancies, the maximum annual increase is the lower of:

1. 2% a year 2. The change in the CPI over the same period

If CPI inflation is 1.5%, the maximum increase is 1.5%. If CPI inflation is 3%, the maximum increase is 2%. Inflation is measured by the CPI from the Central Statistics Office, not the older HICP measure used under RPZ rules. These rent increase rules do not apply to local authority, Approved Housing Body, or cost rental tenancies.

How often rent can be reviewed

For most tenancies, rent may be reviewed once every 12 months. If your home is in an area that became a Rent Pressure Zone in the last 2 years before national rent control replaced RPZs, the first review after that designation may have to wait 24 months from the last rent setting or review. After that, reviews return to once every 12 months. Check your area at rtb.ie, and run your figures through SafeRent’s [Rent Increase Calculator](https://saferent.ie/check/rent-increase).

Worked example: €1,800 a month

Your current rent is €1,800 a month and a valid review is due after 12 months.

If CPI inflation is 1.5%

1. €1,800 × 1.5% = €27 2. New maximum rent = €1,827 a month

If CPI inflation is 3%

1. €1,800 × 2% = €36 2. New maximum rent = €1,836 a month

Confirm the figure with the official [RTB Rent Calculator](https://rtb.ie/rtb-rent-calculator/) for your exact dates and save the printout. A lawful notice should include that calculator evidence.

Important exceptions

New apartments and new student accommodation

For newly built apartments and new Student Specific Accommodation where building commenced on or after 10 June 2025 (with the required Building Control commencement or 7 day notice), the 2% ceiling does not apply. Increases still track CPI only.

New tenancies from 1 March 2026 and market rent

For a new private tenancy created from 1 March 2026, a landlord may in some cases set rent at market rent at the start of that tenancy, for example where the previous tenant left voluntarily, breached tenant obligations, or the home no longer met the household’s needs. Market rent resets are also possible at the end of a 6 year Tenancy of Minimum Duration for those newer tenancies.

For an ongoing tenancy that already existed before 1 March 2026, the landlord cannot reset rent to market rent during that ongoing tenancy. Annual reviews stay under the 2% or CPI cap. Where market rent is claimed, three comparable dwellings from the RTB Rent Register are required.

What a valid Notice of Rent Review must include

A rent increase does not take effect unless the landlord serves a notice in the RTB prescribed form at least 90 consecutive days before the new rent start date. A valid process typically requires the landlord to:

1. Confirm a review is allowed at this time (usually 12 months since the last setting or review) 2. Calculate the maximum increase with the RTB Rent Calculator 3. Check comparable rents on the RTB Rent Register 4. Complete the official Notice of Rent Review form without deleting required wording 5. Serve the notice on the tenant by email (where agreed), post, or hand delivery, at least 90 days before the new rent date 6. Serve a copy on the RTB within 7 days of service on the tenant (rule from 14 September 2026; previously same day) 7. Update the tenancy registration with the new rent within 1 month of the change

The notice should state the new rent, the effective date, the last rent amount, the date the last rent was set, calculator evidence, and three comparable properties from the published register. A casual text, WhatsApp chat, or informal email that is not the prescribed form is not a lawful Notice of Rent Review. Email may deliver the completed form if the tenant has agreed to receive tenancy notices by email. If you also received something that looks like an eviction notice, check it with SafeRent’s [Notice and Eviction Validator](https://saferent.ie/check/notice).

What to do if you think the increase is unlawful

Stay calm, keep paying your current rent, and work through these checks.

1. Ask for the document. Request the Notice of Rent Review on the RTB prescribed form and keep screenshots of any informal message. 2. Check the 90 day clock. Count consecutive days from service to the proposed start date. Fewer than 90 days is a serious defect. 3. Check RTB service. Ask whether a copy was filed with the RTB within 7 days of service on you. If not, the notice is treated as invalid. 4. Check the maths. Run the same dates and rent through the RTB Rent Calculator and SafeRent’s [Rent Increase Calculator](https://saferent.ie/check/rent-increase). 5. Check timing. Confirm at least 12 months (or 24 months in the transitional RPZ case) since rent was last set or reviewed. 6. Reply in writing. Send a short, polite letter or email naming the defects, stating you will continue to pay the current lawful rent, and that you do not accept the proposed increase. 7. Refer a dispute to the RTB if needed. For a valid notice, refer before the new rent date or within 28 days of receiving the notice, whichever is later. If the notice is invalid, Citizens Information states there is no time limit. Continue paying rent while the dispute is decided. 8. Consider reporting. Since 14 September 2026, the RTB can issue a €200 fixed payment notice for certain rent breaches, including setting rent above the legal limit or failing to provide a rent review notice correctly.

FAQ

Can my landlord raise rent by more than 2% if inflation is higher?

For most private tenancies, no. The cap is the lower of 2% or CPI inflation. The main exception is qualifying new apartments and new student specific accommodation that commenced on or after 10 June 2025, where increases track CPI only.

Is a WhatsApp message or text enough to raise my rent?

No. The landlord must serve the RTB prescribed Notice of Rent Review, give at least 90 days notice, and file a copy with the RTB within 7 days of serving you. RTB guidance lists email, post, or hand delivery as the ways to serve a rent review notice. A WhatsApp message or text alone is not valid.

How long do I have to challenge a rent increase at the RTB?

If the notice is valid, refer before the new rent start date or within 28 days of receiving the notice, whichever is later. If the notice is invalid, Citizens Information states there is no time limit. Keep paying your current rent while the case is open.

Sources

1. RTB, Setting and reviewing private rents from 1 March 2026: https://rtb.ie/renting/setting-and-reviewing-private-rents-from-1-march-2026/ 2. RTB, Guide to rent review notices: https://rtb.ie/renting/guide-to-rent-review-notices/ 3. RTB Rent Calculator: https://rtb.ie/rtb-rent-calculator/ 4. RTB, Important changes to rental law from 14 September 2026: https://rtb.ie/about/news/important-changes-to-rental-law-from-14-september-2026/ 5. RTB Notice of Rent Review form (14 September 2026): https://www.rtb.ie/wp-content/uploads/2026/09/Notice-of-Rent-Review-Form_14-Sep_FINAL.pdf 6. Citizens Information, Rent increases in private rented housing: https://www.citizensinformation.ie/en/housing/renting-a-home/landlords-rights-and-responsibilities/rent-increases-in-private-rented-housing/ 7. Citizens Information, Changes to the rules for renting from March 2026: https://www.citizensinformation.ie/en/housing/renting-a-home/changes-to-the-rules-for-renting-from-march-2026/ 8. gov.ie, Residential Tenancies (Miscellaneous Provisions) Bill 2026 press release: https://www.gov.ie/en/department-of-housing-local-government-and-heritage/press-releases/government-approves-residential-tenancies-miscellaneous-provisions-bill-2026/ 9. Irish Statute Book, Residential Tenancies (Miscellaneous Provisions) Act 2026, Section 8: https://www.irishstatutebook.ie/eli/2026/act/3/section/8/enacted/en/html 10. Revised Acts, Residential Tenancies Act 2004, Section 22: https://revisedacts.lawreform.ie/eli/2004/act/27/section/22/revised/en/html