The Control Surface · Illustrative Model

Balancing rent increases, renewal rates and OPEX inflation

Because of inflation, operating expenses rise each year, so owners need to raise rents in line with both the market and consider retaining their residents. Resident retention (renewal rates at lease expiration) matters because vacancy often costs 2-3 months of rent, and make-ready costs can be 1-2 months of rent. So any move-out costs consume rent increases. If the increase is too large, it can cause the tenant to look for a new home elsewhere. This calculator runs the full chain of events to help build intuition about each lever: the unit-level payback, the 12-month portfolio cash flow against doing nothing, and the three-year NOI picture once OPEX inflation is considered. Every input recomputes live.

Your decision
+$50(2.5%)
Applied to both renewal offers and new vacant listings (unified pricing).
Renewal behavior
Likelihood of renewal if rent stays flat.
Renewal drops 2.0 points for every 1% of rent increase.
Turn cost
Days a home sits empty on turnover.
Turn cost as a multiple of one month's rent.
Portfolio & horizon
Annual compounded OPEX growth (Stage 3).

The verdict

Stage 1 · The unit-level decision

Monthly rent gain
per renewing home
Turn penalty
vacancy + make-ready
Payback period
months to recover one turn

Stage 2 · The 12-month portfolio impact

Required breakeven
renewal rate to break even
Predicted renewal
after elasticity
Avg monthly delta
vs doing nothing
12-month total
cumulative vs baseline

Cumulative cash flow vs the $0 baseline

Monthly delta (bars) and running total (line) against doing nothing. Excludes OPEX inflation; that's Stage 3.
Monthly gain Monthly hit Cumulative

Stage 3 · The OPEX inflation drag

Three-year NOI growth vs Year-1 baseline

A $0 increase isn't a safe baseline: turnover plus rising OPEX compress NOI on their own. Bars show NOI growth from Year 1, doing nothing vs taking the increase.
Hold rent flat Take the increase
Illustrative. A deterministic decision model on synthetic, anonymized portfolio assumptions ($2,000 base rent, 1,000 units by default). It demonstrates the method, not advice on any specific asset. No client or tenant data appears on this page.