How do I calculate a rent increase?

To apply a percentage rise, multiply the current rent by one plus the percentage as a decimal. A 5% rise on $500 is 500 times 1.05, which is $525. To find the percentage, divide the change by the old rent and multiply by 100.

Is the rent figure weekly or monthly?

Rent in New Zealand is usually quoted per week. This calculator works with whatever period you enter and also shows the annual cost change, so you can see the full impact of an increase over a year.

Rent Increase Calculator

This calculator works out a residential rent increase two ways, so you can check either side of a rent review. In the first section, enter your current weekly rent and the percentage rise your landlord is proposing to see the new weekly rent, the extra dollars you will pay each week, and the extra cost over a full year, so you can judge the real impact rather than just the percentage on its own. In the second section, enter the old and new rent figures to work out the percentage and dollar increase between them, which is useful if you have been given a new figure and want to check how large a rise it actually represents. Under the Residential Tenancies Act, a landlord can raise the rent only once every 12 months for a periodic tenancy, and must give at least 60 days written notice before the increase takes effect, so use this alongside checking your notice date and tenancy agreement. It is a handy tool for tenants checking whether a proposed rise is reasonable, and for landlords working out a fair new rent ahead of a review. The figures are for guidance only, so always confirm the current rules with Tenancy Services and read your own tenancy agreement before agreeing to or issuing a rent increase, since a fixed-term tenancy can have different conditions.

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Apply a percentage increase

Current rent (per week)

Increase

new weekly rent

Extra per week$0

Extra per year$0

Find the percentage from old and new rent

Old rent

New rent

increase

The rules in brief

Under the Residential Tenancies Act, rent for a periodic tenancy can be increased only once in any 12 month period, and the landlord must give at least 60 days written notice. This calculator handles the maths, but always check the latest rules with Tenancy Services and your agreement.

Worked example

A 5% increase on $550 a week is $27.50, taking the rent to $577.50. Over a year that is about $1,430 more. Going from $550 to $590 is a $40 rise, which is about a 7.3% increase.

Related calculators

Rent Affordability Calculator: rent you can afford.
Rent vs Buy Calculator: renting versus buying.
Flatting Costs Calculator: split flat costs.
Percentage Increase Calculator: any percentage rise.

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