The Role of the Residential Tenancies Board (RTB)

28th September 2026

The Residential Tenancies Board (RTB) is the State body that regulates private renting in Ireland: it registers every tenancy, polices rent rules, and settles landlord–tenant disputes. It replaced the PRTB and operates under the Residential Tenancies Acts 2004–2026.

This guide explains, plainly and without spin, what the RTB requires of landlords, what it costs, how it affects rent, how disputes run and how long they take. Where the system looks one-sided, we say so.

What the RTB is

The RTB has four main jobs:

Register every private, student and cost-rental tenancy, every year.
Control rent by enforcing the national rent rules and publishing the RTB Rent Register.
Resolve disputes through mediation, adjudication and Tribunal hearings, whose orders are legally binding.
Investigate and sanction landlords for breaches such as non-registration or rent overcharging.

It covers most private residential lettings, including Approved Housing Body and student-specific tenancies. It does not cover owner-occupiers renting a room in their own home (rent-a-room), holiday lets, or commercial property.

Registration: every landlord, every tenancy, every year

Every landlord must register each tenancy with the RTB within one month of it starting, and re-register it on each anniversary. Annual registration has applied since 4 April 2022; before that, registration was once per tenancy.

What registration involves:

Landlord details, including PPS number (or company number) and contact details.
Property details, including Eircode, BER and floor area.
Tenant names, rent, and the tenancy start date.
Updating the RTB when rent or other details change.

The consequences of not registering became tougher from 14 September 2026:

Enforcement route	Penalty
Fixed Payment Notice	€100 initially (legislation allows this to rise to €500–€1,000); unpaid notices go to prosecution
Criminal prosecution	Fine up to €5,000 and/or up to 12 months in prison, plus up to €1,000 per day the breach continues, plus RTB legal costs
RTB investigation and sanction	Up to €15,000 fine plus up to €15,000 costs, per unregistered tenancy

The RTB can now bring proceedings up to 3 years after a breach (previously 1 year), and can act on tenancies that “ought to have been” registered.

The most practical consequence: an unregistered landlord cannot use the RTB dispute service, for example to recover arrears or enforce a valid notice of termination. A tenant can use it whether or not the landlord has registered.

What it costs landlords

A typical private landlord pays €40 per tenancy per year to the RTB, plus €10 for every month (or part-month) a registration is late. Registration is the landlord’s legal obligation and the landlord’s cost.

Item	Fee
Annual registration – private, student, cost-rental	€40 per tenancy
Annual registration – Approved Housing Body	€20 per tenancy
Composite registration – up to 10 units in one building, on time	€170 (AHB €85)
Late fee	€10 per month or part-month (AHB €5)
Re-registration after a new tenancy within 12 months	No fee, if done within one month
Mediation	Free
Adjudication	€30
Tribunal appeal after mediation	€30
Tribunal appeal after adjudication	€85

The hidden cost is time and loss of rent. A landlord pursuing arrears through the RTB is usually without rent for months while the case runs (see timelines below), and enforcing the final order is a separate cost again.

How the RTB influences rent

Since 1 March 2026, rent increases nationwide are capped at 2% a year or CPI inflation, whichever is lower, and Rent Pressure Zones have been replaced by this single national system. The RTB enforces the cap, publishes the Rent Register, and investigates overcharging.

Existing tenancies (started before 1 March 2026)

Rent can be reviewed once every 12 months, capped at 2% or CPI, whichever is lower.
No reset to market rent is allowed, however far below market the rent has fallen.
The six traditional grounds for ending a tenancy still apply.

New tenancies (from 1 March 2026)

Every new tenancy runs as a rolling 6-year Tenancy of Minimum Duration, with security of tenure after 6 months.
Rent can be reset to market level at the start of a new tenancy only if the previous tenant left voluntarily, breached their obligations, or the property no longer suited their needs. It can also be reset at the end of each 6-year cycle.
Between resets, annual increases are capped at 2% or CPI. New apartments (construction started from 10 June 2025) can rise by CPI with no 2% cap.

How the RTB checks compliance

Every rent review notice must be sent to the tenant and the RTB on the same day, with at least 90 days’ notice.
The RTB Rent Calculator sets the maximum permitted increase.
A market-rent reset needs a Market Rent Statement quoting the most recent rent for three similar properties from the RTB Rent Register, matched on size, type, character and BER.
Failing to serve rent notices properly or supply rent-calculation evidence can now attract a Fixed Payment Notice.

Security of tenure under the new rules

Landlord type	Can end a new tenancy during the 6-year cycle for…	At the end of the cycle, also for…
Small landlord (1–3 tenancies)	Tenant breach; property unsuitable; sale due to hardship; own or family occupation	Sale, substantial refurbishment, change of use
Large landlord (4+ tenancies, or any company)	Tenant breach; property unsuitable only	No additional grounds

How the RTB deals with issues

The RTB handles problems through two separate channels: disputes between landlord and tenant, and investigations of landlords for breaking rental law.

Disputes cover rent arrears, overholding (a tenant staying on after a valid notice), deposit retention, termination notices, rent reviews, repairs and breaches of obligations, and anti-social behaviour. In the RTB’s figures for January–November 2024, arrears and overholding made up 42% of 9,114 new disputes; deposits 19%; landlord breaches 18%; termination-notice validity 17%.

The dispute route, step by step

Step	What happens	Cost	Leads to
1. Lodge the dispute	Applicant chooses mediation or adjudication	—	Step 2a or 2b
2a. Mediation	Voluntary; can be done by phone	No charge	Agreement → Determination Order. No agreement → Step 3
2b. Adjudication	Hearing before one adjudicator	€30	Determination Order. Either side may appeal → Step 3
3. Tribunal	Hearing before a panel of three	€30 after mediation; €85 after adjudication	Tribunal Determination Order
4. High Court	Appeal on a point of law only	Court fees and legal costs	Final decision
5. Enforcement	If an order is ignored, the winning party goes to the District Court	Court fees; RTB may help	Court order enforcing the RTB decision

The applicant picks mediation or adjudication. Both lead to a legally binding Determination Order.

Mediation is free and can be done by phone, with the mediator speaking to each side separately.
Adjudication is a hearing before one adjudicator, usually remote, lasting 1–2 hours. Hearings are public and reports are published on the RTB website.
Tribunal is a panel of three, also public, hearing appeals or cases where mediation failed.

Investigations are separate. Anyone can report a landlord for failing to register, overcharging rent, or improperly serving notices. The RTB can issue a caution or a fine of up to €15,000 per breach, plus up to €15,000 in costs. Fines go to the Exchequer, not the complainant. A sanction only takes effect once the Circuit Court confirms it.

Adjudication and timelines

A contested case taken through adjudication and a Tribunal appeal typically takes 8–9 months before a final order, and enforcement comes after that. The RTB’s most recent published averages are 20 weeks for adjudication (2025) and, for 2024, 6 weeks for mediation and 16 weeks for a Tribunal.

Deadlines to lodge a dispute

Dispute	Deadline to refer to the RTB
Validity of a termination notice (tenant not in breach)	90 days from receiving the notice
Validity of a termination notice (tenant in breach)	28 days from receiving the notice
Rent increase	Before the new rent takes effect, or within 28 days of the notice
Rent or deposit dispute after the tenancy ends	28 days after the tenancy ends

How long each stage takes

Stage	Typical time	Key deadline
Mediation	~6 weeks	Appeal to Tribunal within 10 working days if no agreement
Adjudication – hearing to Determination Order	~20 weeks from application	Hearing notice given in advance; appeal within 10 working days of the order
Tribunal appeal	~16 weeks	At least 10 working days’ notice of hearing; appeal to High Court within 21 days of the order
RTB enforcement support	Documents within 7 days of request	Legal assistance is discretionary, case by case
District Court enforcement	Not published; depends on court lists	—

The RTB states that late Tribunal applications are rejected, so the 10-working-day window is effectively absolute.

Worked example: rent arrears

Tenant falls into arrears; landlord serves a 28-day arrears warning, then a termination notice.
Tenant does not leave. Landlord refers overholding and arrears to adjudication.
Around 20 weeks later, a Determination Order issues ordering vacant possession and repayment.
Tenant appeals within 10 working days. Tribunal decides around 16 weeks later.
Tenant still does not comply. Landlord applies to the RTB for enforcement support or goes to the District Court.

Throughout this period, which can pass 9 months, the landlord may receive little or no rent while remaining liable for the mortgage, insurance, LPT and repairs.

Is there an appeals process?

Yes, but it is narrow and the windows are short. Each type of RTB decision has one route of appeal:

Decision	Appeal to	Deadline	Fee	Grounds
Adjudicator’s Determination Order	RTB Tribunal (3 members)	10 working days	€85	Full rehearing of the case
Mediation (agreement reached, or no agreement)	RTB Tribunal	10 working days	€30	Full hearing
Tribunal Determination Order	High Court	21 days	Court fees and legal costs	Point of law only; facts cannot be reargued
RTB investigation sanction (fine/caution)	Circuit Court	21 days	Court fees and legal costs	Full appeal; no internal RTB appeal exists

A party unhappy with how the RTB handled their case, rather than the outcome, can complain to the RTB directly and, if not resolved, to the Office of the Ombudsman. Judicial review in the High Court is also available where the RTB acted outside its powers or unfairly, but it is costly and slow.

What seems unfair

The system is built to protect tenants, and several features weigh heavily on landlords, particularly small ones. The points below are our view of where the balance looks wrong.

Flagged for landlords

One-way access to disputes. An unregistered landlord is barred from the dispute service, but a tenant can bring a case regardless. A registration slip can leave a landlord unable to recover arrears or possession.
Months without rent. With adjudication averaging 20 weeks and a Tribunal adding about 16 more, a non-paying tenant can remain in occupation for 9 months or longer while the landlord carries every cost.
Winning is not getting paid. The RTB does not enforce its own orders. The landlord must go to the District Court, and RTB legal help is discretionary. Arrears awards are often never fully recovered.
Below-market rents locked in. Tenancies that began before 1 March 2026 can never be reset to market, however low the rent. Only 2% or CPI can be added each year.
No reset if the landlord ends the tenancy. Even under the new rules, rent resets only if the tenant leaves voluntarily, is in breach, or the property no longer suits them. A landlord who ends a tenancy lawfully, for sale for example, cannot reset for the next tenant.
“Large landlord” starts at four tenancies. An individual with four lets is treated like an institutional fund and loses the right to sell or move family in during the 6-year cycle.
Short, rigid appeal windows. 10 working days to lodge a Tribunal appeal, with late applications rejected; appeals past the Tribunal are on points of law only.
Penalties for admin errors, with a longer look-back. From 14 September 2026, Fixed Payment Notices apply to paperwork failures such as not updating tenancy details, and the RTB can pursue breaches up to 3 years old.
Public hearings and published decisions. Adjudication and Tribunal hearings are public and reports are published online, which carries reputational risk even for a landlord found to have acted properly.
Fines to the Exchequer. RTB sanctions fund the State, not the landlord or tenant affected.

Flagged for tenants (for balance)

The same delays hurt tenants waiting for a wrongly withheld deposit to be returned.
Tenants also face public hearings and published determinations, which can follow them when applying for future rentals.

Our overall view: the rules on rent and tenure are now very tight, while the machinery for resolving disputes and enforcing orders has not kept pace. A landlord who registers on time, keeps records, and serves every notice correctly is far better protected when something goes wrong.

What this means for you as a landlord

Register every tenancy within one month of the start date, and renew it on each anniversary.
Update the RTB promptly when rent or tenancy details change.
Before any rent review, use the RTB Rent Calculator and serve the notice on the tenant and the RTB on the same day, with 90 days’ notice.
For a market-rent reset, prepare a Market Rent Statement with three RTB Rent Register comparables.
Count your tenancies: at four or more, the stricter large-landlord rules apply to new tenancies.
Keep written records of arrears, correspondence, inspections and notices, ready for a hearing.
Act on arrears early. Every week of delay adds to a process that already takes months.
Diary the 10-working-day appeal window the moment any RTB order arrives.

This guide is general information, not legal advice. Figures are as published by the RTB and Government at the date shown above and can change.

The Role of the Residential Tenancies Board (RTB)

What the RTB is

Registration: every landlord, every tenancy, every year

What it costs landlords

How the RTB influences rent

How the RTB deals with issues

Adjudication and timelines

Is there an appeals process?

What seems unfair

What this means for you as a landlord

Sources