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Rent Arrears Calculator for Ireland

Calculates the total rent owed, including partial periods, for a residential tenancy in Ireland. For landlords and tenants to formalise arrears.

Your details

The agreed rent in Euro. Enter the weekly amount if you pay weekly, or the monthly amount if you pay monthly.

How often is the rent normally paid?

The date on which the last complete rent payment (covering a full period) was due and was paid.

The date as of which you are calculating the arrears. Defaults to today.

Result

Total Rent Owed €3,950.00

The total outstanding rent as of the calculation date.

How it is calculated

Days in Arrears Total days from the last paid period to the calculation date.
79 days
Full Rent Periods Owed Complete rent periods (weeks or months) that are unpaid.
2
Amount for Partial Period Rent owed for the incomplete period at the end.
€950.00
Amount for Full Periods Rent owed for the complete unpaid weeks or months.
€3,000.00
Suggested Payment Deadline A typical deadline for payment in a Notice of Rental Arrears, based on the RTB's 28-day cure period.
16 November 2026
Keep in mind
  • This calculator provides an estimate of rent arrears. It assumes a standard month of 30 days and a standard week of 7 days for calculation purposes. The legal notice period for rent arrears is typically 28 days. Always seek professional advice for formal legal proceedings.

Indicative result, calculated from the details and the rules listed below. It does not replace an official calculation or advice from a professional.

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Notice of Rental Arrears

Rent Arrears Calculator for Ireland

This tool helps landlords and tenants in Ireland calculate the total amount of overdue rent, known as rent arrears. It determines how many full rent periods (weeks or months) are unpaid, adds any amount for a partial period, and provides a total sum owed as of a specific date. The result can be used to formally notify the other party, particularly when serving a Notice of Rental Arrears.

How Rent Arrears Are Calculated

Under Irish tenancy law, rent is due as agreed in the lease, typically weekly or monthly. Arrears accumulate from the day after the last full payment was made. The calculation involves:

  1. Determining the days in arrears: The number of days from the date the last complete rent payment covered, up to the date of calculation.
  2. Calculating full periods owed: Dividing the total days in arrears by the length of your rent period (7 days for weekly, 30 days for monthly) to find the number of complete unpaid periods.
  3. Calculating the amount for full periods: Multiplying the number of full periods by the rent amount.
  4. Calculating a partial period: Any remaining days that don't make a full period are calculated using a daily rent rate (weekly rent divided by 7, or monthly rent divided by 30).
  5. Summing the total: Adding the amount for full periods and the amount for the partial period gives the total rent owed.

Example Calculation (Monthly Rent)

Imagine a tenancy with a monthly rent of €1,500. The tenant last paid rent covering the period up to 1st August 2026. By 19th October 2026, they are in arrears.

  • Days in arrears: From 2nd August to 19th October is 79 days.
  • Full periods owed: 79 days / 30 days per period = 2 full months.
  • Amount for full periods: 2 months x €1,500 = €3,000.
  • Partial days: 79 days - (2 * 30) = 19 remaining days.
  • Daily rate: €1,500 / 30 days = €50 per day.
  • Amount for partial period: 19 days x €50 = €950.
  • Total rent owed: €3,000 + €950 = €3,950.

Therefore, the tenant would owe €3,950 in rent arrears as of 19th October.

Example Calculation (Weekly Rent)

Imagine a tenancy with a weekly rent of €175. The tenant last paid rent covering the period up to 7th September 2026. By 19th October 2026, they are in arrears.

  • Days in arrears: From 8th September to 19th October is 42 days.
  • Full periods owed: 42 days / 7 days per period = 6 full weeks.
  • Amount for full periods: 6 weeks x €175 = €1,050.
  • Partial days: 42 days - (6 * 7) = 0 remaining days.
  • Daily rate: €175 / 7 days = €25 per day.
  • Amount for partial period: 0 days x €25 = €0.
  • Total rent owed: €1,050 + €0 = €1,050.

Notice of Rental Arrears

If rent remains unpaid, a landlord may serve a formal Notice of Rental Arrears. This notice must specify the total amount owed, the period it covers, and give the tenant a 28-day "cure period" to pay the outstanding sum. Failure to pay within this period is a ground for termination of the tenancy under the Residential Tenancies Act 2004 (as amended). The calculator provides a suggested payment deadline based on this 28-day period.

Frequent Scenarios

  • Switching between weekly and monthly: Ensure you select the correct payment frequency and enter the corresponding rent amount.
  • Including today: The calculation includes the calculation date in the arrears period.
  • Multiple missed payments: The calculator works for any number of missed periods, as long as you input the date of the last full payment that was made.

Next Steps

After calculating the arrears, the next document a landlord should prepare is a Notice of Rental Arrears. This formal notice is a required step before any action to terminate the tenancy can be taken. It clearly communicates the debt to the tenant and starts the legal clock on the 28-day payment window.

Frequently asked questions

What is the legal notice period for rent arrears in Ireland?

A landlord must give a tenant 28 days to pay any outstanding rent arrears. This is known as the cure period, as set out in the Residential Tenancies Act 2004 (as amended).

How is the daily rent rate calculated?

For weekly rent, the daily rate is the weekly rent divided by 7. For monthly rent, a standard month of 30 days is used, so the daily rate is the monthly rent divided by 30.

What date should I use as the 'Last Full Payment Date'?

Use the date that the last rent payment you received was meant to cover. For example, if a monthly payment on 1st September covered all of September, and nothing has been paid since, your last full payment date is 1st September.

Can I use this for a Part 4 tenancy or a fixed-term lease?

Yes, the calculation of arrears is the same regardless of the tenancy type. The rules for serving notice (the 28-day period) apply to most residential tenancies.

Does this calculator add interest or penalties for late payment?

No. This calculator only sums the unpaid base rent. Any late fees or interest charges must be provided for in the tenancy agreement and are not included here.

What if my rent is paid fortnightly or every two months?

This calculator currently supports only weekly and monthly frequencies. For other periods, you may need to perform a manual calculation using the daily rate principle or adjust the inputs to the closest standard period.

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