How to Increase Rent Without Losing a Good Tenant

Most landlords put rent up too late, by too much, and lose the tenant.

Then they discover the increase they fought for was worth less than the void it caused. This is the arithmetic that decides it, and the sequence that gets you the rise without the vacancy.

Start with the number that actually matters

An extra 50 a month is 600 a year. That sounds worth having.

Now price the alternative. If the increase prompts the tenant to leave, you are looking at a void plus a re-let. Using the property we work with throughout this blog - 1,400 a month rent, mortgage of 829.02:

So the 600 you gained takes just over four years to repay the 2,510 you lost - and that is assuming the new tenant stays that long and pays the higher figure.

The tenant you keep is usually worth more than the increase you win. That does not mean never raise rent. It means the size of the rise matters far less than whether they stay.

When to raise it

Small and regular beats large and rare. A tenant who has had no increase for four years and is suddenly asked for 15% feels ambushed and starts looking. The same tenant given 3% a year barely notices.

Sensible triggers:

• Annually, at the same point each year - predictability is what makes it acceptable
• When your own costs move - a mortgage rate change is a reason a tenant understands
• When you have genuinely improved the property - new boiler, new kitchen, better insulation
• When you are meaningfully below market - and you can show it

Poor triggers: because it has been a while, or because you saw one optimistic listing on a portal.

Find out what the market actually pays

Not asking rents. Achieved rents.

Portals show what landlords hope for. The properties still listed after six weeks are the ones priced wrong. Look instead at what has recently let and disappeared, ask a local agent what comparable units actually achieved, and discount anything advertised for more than a month.

If you are within about 5% of market, the increase is rarely worth the risk. If you are 15% below, it is.

The legal part - check before you write anything

This is jurisdiction-dependent and getting it wrong makes the increase unenforceable.

If your agreement has no rent review clause, you are relying entirely on the statutory route. That clause belongs in the document from day one - see What Has to Be in a Tenancy Agreement.

How to actually ask

The letter does most of the work. Three things make it land:

Give more notice than you owe

If the minimum is one month, give two. It signals this is a considered decision, not a reaction, and it gives the tenant time to accept rather than react.

Give a reason

Not an apology - a reason. “My mortgage rate changed in March and insurance rose 12% this year” is a fact a reasonable person accepts. Silence invites the tenant to assume you are simply extracting more.

Say what stays the same

That you value them, that you are not planning to sell, that repairs continue as normal. Most tenants who leave after an increase are not leaving over the money - they are leaving because the increase felt like a signal that something has changed.

A worked comparison

Two landlords, same flat, tenant paying 1,400 and 8% below market.

Landlord A asks for 1,550 - the full market rate, one month's notice. The tenant, who was not unhappy but is now unsettled, gives notice. Seven weeks empty. New tenant at 1,550. First-year gain: 1,800 in extra rent, minus roughly 2,700 in void and re-letting costs. Down about 900.

Landlord B asks for 1,470 - about half the gap - with two months' notice and a short note explaining the mortgage change. The tenant accepts and stays three more years. Gain: 840 a year, no void, no re-letting, no risk. Up 2,520 over three years, and the property never sits empty.

Landlord B did not get the market rate. Landlord B got the money.

Frequently asked questions

Can I raise the rent during a fixed term?

Usually only if the agreement includes a rent review clause setting out how and when. Otherwise you generally wait until the fixed term ends.

What if the tenant refuses?

Depends on your jurisdiction. In some, a tenant can challenge an increase through a tribunal. In others your route is to end the tenancy properly and re-let - which brings back the void arithmetic above.

Should I raise rent for a tenant who has never missed a payment?

Yes, but modestly and predictably. A reliable tenant is an asset with a measurable value: no voids, no re-letting costs, no screening risk. Price accordingly.

How do I know if I am below market?

Track achieved rents for comparable properties over six months, not asking prices on one afternoon.

Know your position before you write the letter

The decision above turns on two numbers you should already have: what the property currently produces, and what a void actually costs you.

The Rental Property Tracker holds both - rent expected against rent received per property, and a cash flow figure that updates when you change the rent. $27 once.

To model the increase before you send it, use the free Rental Yield & Cash Flow Calculator, and read How to Reduce Void Periods for what an empty month really costs.

General information for landlords, not legal or financial advice. Notice periods, permitted frequency, prescribed forms and rent controls differ substantially between countries, states and cities and change often. Confirm your position with a qualified solicitor or attorney before serving a rent increase notice.