A renewal increase is usually decided one of two ways: a standard percentage applied across the portfolio, or a figure pulled from what comparable units are asking.

Both ignore the same thing. An increase only earns anything if the resident accepts it. If they leave, you have traded a modest annual gain for a vacancy, a make-ready and a re-letting cycle.

That trade-off is arithmetic, and it is worth doing before the renewal offer letter goes out rather than after the resident declines.

The Two Numbers

• What the increase is worth. The monthly increase multiplied by the number of months in the renewal term. A $75 increase over twelve months is $900 of additional rent, before anything else.

• What turnover costs. Lost rent while the unit is empty, make-ready and cleaning, marketing, letting or leasing fees, and staff time. The turnover cost calculation covers the components; the figure will be specific to your market, property type and portfolio.

The comparison is not complicated, and it is often skipped when renewal pricing is set by a standard percentage.

A Worked Comparison

Illustrative figures. A residential unit at $1,800 a month, with a proposed increase to $1,875.

Now the other side, using figures this operator has measured for this property type:

The increase is worth $900 over the term. Turnover on this unit is estimated at $2,962, roughly three times the gain.

That does not mean never increase the rent. It means the increase is only profitable if the resident stays, and the downside of getting it wrong is several times the upside of getting it right.

The Break-Even

The useful way to frame it is as a probability.

If the resident leaves because of the increase, you lose twice: the $900 you would have gained, and the $2,962 the turnover costs. So the break-even compares the gain against the sum of both.

$900 ÷ ($900 + $2,962) = 23.3%

Under this simplified model, the increase adds value only where the additional risk of losing the resident because of it stays below roughly 23%. The word "additional" matters: some residents leave regardless of the rent, and the calculation is about the extra risk the increase creates rather than the total chance of a vacancy.

Nobody can measure that probability precisely. But the number is still useful, because it tells you how much risk the increase is carrying. The same calculation on a $25 increase gives $300 ÷ ($300 + $2,962), or about 9%, which is a much thinner margin for a much smaller gain.

Two things fall out of this.

• Small increases carry a poor risk ratio. A $25 monthly increase is $300 over the term, against a turnover cost many times larger. It may leave too little additional income to justify the potential turnover risk. 

• Larger increases can be more defensible than they look, provided the unit is genuinely below market. A $150 increase is $1,800 over the term, which is a materially better return against the same downside. If the unit is materially below comparable achieved rents, there may be more room to increase, but the potential effect on turnover still needs to be considered.

Where the Simple Version Breaks Down

The break-even is a starting point, not an answer. Four things it does not capture.

1. Compounding. An increase does not last twelve months. It becomes the base for every subsequent renewal. Holding rent flat to retain a resident is a decision that costs something in year three as well as year one.

2. The unit's position against market. A unit already close to comparable achieved rents may have less room for an increase. A unit $200 below comparable rents may have more room, although the potential effect on turnover still needs to be considered. 

3. Who the resident is. A resident who pays on time, reports problems early and looks after the unit is not interchangeable with an unknown applicant. Screening costs, arrears risk and condition risk all reset at turnover.

4. What the market is doing. The vacant period in the calculation above assumes the unit lets in three weeks. In a slower market that assumption is the largest single number in the model and the one most likely to be wrong.

That last point is worth being blunt about: the calculation is highly sensitive to the vacancy assumption, so it should be based on actual leasing data for the property type and market wherever possible.

What You Cannot Decide

Two constraints sit outside the arithmetic entirely.

1. Rent-regulated units. Where a unit is subject to rent stabilisation, rent control or a similar framework, the permitted increase is set by the applicable rules rather than by market analysis. Those rules differ by jurisdiction, are revised periodically, and can turn on how long the resident has been in occupation. The calculation in this article does not apply where a regulated limit governs the increase.

2. The owner's authority. The management agreement determines who has authority to approve renewal pricing. Where owner approval is required, the renewal rent should be agreed before the offer is issued. Sending an offer the owner has not approved creates a commitment that may have to be withdrawn.

There are also notice requirements. How much notice a rent increase requires, and in what form, varies by jurisdiction and tenancy type. The rent increase letter covers the notice itself.

How to Make the Decision

A workable sequence for each expiring lease.

1. Establish the unit's position. What comparable units are actually achieving, where reliable data is available, rather than relying only on asking rents.

2. Calculate what turnover actually costs on this property type, using your own data rather than a rule of thumb. Vacant days, make-ready, marketing, fees.

3. Work out the break-even. Divide the value of the increase over the term by the sum of that increase value and the estimated turnover cost. That gives the simplified break-even level of additional turnover risk.

4. Assess this resident. Payment history, length of tenancy, condition, how far below market they are, and whether anything suggests they were planning to move anyway.

5. Consider the alternatives to a straight increase. A longer term at a smaller increase. A staged increase. A smaller increase with a concession attached. A resident at market who is offered a two-year term at a modest increase may be a better outcome than a larger one-year increase that risks a vacancy.

6. Get owner approval, then issue the offer.

7. Record what you decided and why. Next year's renewal is easier when the file shows the reasoning rather than only the figure.

Reading the Result

Whatever the decision, the outcome tells you something.

• Residents accepting every increase may mean the increases are too small, or that the units are below market and there is more room than you are using.

• Residents leaving after increases may mean the increases are too large, the market has moved, or something other than rent is driving the decision. The exit survey is where that distinction gets settled.

• A renewal rate moving in one direction over several cycles is a signal about pricing, property condition or service rather than about individual residents. Renewal rate and turnover cost are both covered in the rental property KPIs guide.

The point of tracking it is that renewal pricing is one of the few decisions a manager makes repeatedly, with a measurable outcome, on a known schedule. That makes it one of the few worth actually learning from.

Frequently Asked Questions

1. How much should rent be increased at renewal?
There is no single figure. The useful approach is to compare the value of the increase over the renewal term against the estimated cost of turnover on that property, and to consider how far the unit sits below market, the resident's history and what the local market is doing. Where a unit is rent-regulated, the permitted increase is set by the applicable rules.

2. How do you calculate the break-even on a renewal increase?
Divide the value of the increase over the renewal term by the sum of that increase value and the estimated turnover cost, because losing the resident costs you both. A $900 increase against a $3,000 turnover cost gives $900 ÷ ($900 + $3,000), or about 23%. Under this simplified model, that is the break-even level of additional turnover risk attributable to the increase.

3. Is a small rent increase always worth taking?
Not necessarily. A small increase generates a small gain against the same turnover downside, so the risk ratio is poor. A modest increase that prompts a resident to leave can cost several times what it would have earned.

4. What does the break-even calculation miss?
It does not capture compounding across future renewals, where the unit sits against market, the value of a known reliable resident compared with an unknown applicant, or what the local letting market is doing. The vacancy assumption is usually the weakest number in the calculation.

5. What about rent-controlled or rent-stabilised units?
Where a unit is subject to rent stabilisation, rent control or a similar framework, the permitted increase is determined by the applicable rules rather than by market analysis or a break-even calculation. Those rules vary by jurisdiction and are revised periodically.

6. Who decides the renewal rent?
The management agreement determines who has authority to approve renewal pricing. Where the manager prepares a recommendation and the owner approves it, the rent should be agreed before the renewal offer is sent to the resident.

The Increase Only Counts If They Stay

Renewal pricing is usually treated as a rent question. It is closer to a retention question with a rent figure attached.

The arithmetic will not make the decision for you, because the probability at the centre of it is a judgement. What it does is show you what that judgement is worth: whether you are risking three thousand dollars to earn nine hundred, and whether the unit's position and the resident's history justify it.

The comparison takes a few minutes per unit, and it can produce a different answer from a standard percentage applied across the portfolio.

RIOO brings lease terms, renewal dates, payment history and property-level visibility into the same property management platform, so the information a renewal decision depends on is available when the decision is being made. That sits across contracts and renewals and dashboards and reporting.

Note: Figures in this article are illustrative and do not represent any particular property or market. Permitted rent increases, notice requirements and renewal obligations vary by state, locality and lease, and rent-regulated properties are subject to separate rules. Confirm what applies before setting or communicating a renewal rent.