Irish Calculators
Property

Net Effective Rent Calculator with Free Months

Calculate average rent after the concessions in a stated lease and compare it with the quoted monthly rent. The result does not set legal rent limits or treat a refundable deposit as a cost.

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Your numbers

Your figures stay on this device.

How the calculation works

Net effective rent spreads stated concessions across the whole lease. It helps compare a quoted monthly rent with an incentive-adjusted average, while showing non-refundable tenant fees separately from the rent itself.

Effective rent = [monthly rent × (contract months − free months) − additional rent credit] / contract months. Non-refundable fees are shown separately.

  1. Calculate rent after free periods

    Multiply quoted monthly rent by contract months less free-rent months. This leaves the amount payable before any separate cash concession.

  2. Deduct the additional rent credit

    Apply the cash credit once. The resulting contract rent is spread across every month of the contract, including free months.

  3. Add fees for occupancy cost

    Net effective monthly rent excludes non-refundable fees. A second monthly average includes those fees, and the total-cost result shows the complete amount entered.

Worked example: One free month and an extra credit

Sample inputs demonstrate the method. They are not a forecast or product offer.

The first example charges €1,000 for eleven of twelve months, then deducts a further €200 credit. Contract rent is €10,800, averaging €900 monthly. Adding €120 non-refundable fees gives €10,920 total cost, or €910 per month.

Quoted monthly rent
1000
Contract months
12
Free-rent months
1
Additional cash rent credit
200
Non-refundable tenant fees
120

Expected result

Net effective monthly rent
€900.00
Monthly occupancy cost including entered fees
€910.00
Contract rent after incentives
€10,800.00
Worked example: No incentives

Sample inputs demonstrate the method. They are not a forecast or product offer.

Quoted monthly rent
750
Contract months
6
Free-rent months
0
Additional cash rent credit
0
Non-refundable tenant fees
0

Expected result

Net effective monthly rent
€750.00
Total cost including fees
€4,500.00

Understanding your result

Effective rent is an average, not necessarily the amount paid each month. The lease can still require the full quoted rent in paid months and zero in the specified free period.

The difference between effective rent and fee-inclusive occupancy cost identifies the effect of the separate charges. Both use the same contract-month denominator.

Questions you might have

Is this the amount I pay each month?

Not necessarily. It is an average across the contract; the actual payment dates follow the lease.

Choosing the right inputs

Free-rent months
Enter the number of rent-free months, including a fractional month if appropriate. It cannot exceed the whole contract term.
Additional cash rent credit
Include an additional cash rent credit only if it is separate from the free months. The credit cannot exceed the rent otherwise payable after those free months.
Non-refundable tenant fees
Use non-refundable tenant charges. A refundable security deposit is money tied up temporarily, not a cost consumed by the lease in this calculation.

Common mistakes to avoid

  • Do not enter the cash value of a free month again as an additional credit.
  • The tool does not determine lawful rent levels, discount future payment dates or treat deposits as consumed rent.

Assumptions to check

  • The calculation does not decide legal rent limits or model refundable security deposits as costs.

Sources and method

Read our calculation and testing approach.