The $100 Question
You have a good tenant. Pays on time. Doesn't call about every squeaky hinge. Has been in your $2,000/month single-family rental for two years. The lease is up in three months.
Market rents have crept up. You could probably get $2,100, maybe $2,150, for the unit if you listed it today. So you're thinking about raising the rent $100/month on renewal. That is $1,200 per year in additional income. Easy math.
Except it's the wrong math. And it's the math most landlords do.
The Number Everyone Forgets
A $100/month rent increase generates $1,200 per year. That's the upside. Clear and simple.
Now here's the downside nobody calculates: what happens if your tenant says no?
Turnover on a single-family rental isn't just "finding a new tenant." It's a cascade of costs that hits your bank account all at once:
Vacancy: $2,000-$4,000. Even in a healthy market, expect 2-4 weeks between tenants. In a softer market, 6-8 weeks is common. At $2,000/month, every empty week costs you $500.
Make-ready: $500-$2,000. Professional cleaning, touch-up paint, minor repairs, carpet cleaning or replacement. The unit that looked fine with a tenant living in it reveals every scuff and stain once it is empty.
Listing and marketing: $100-$500. Photography, listing fees, yard signs. If you're using a leasing agent, add $1,000-$2,000 for their fee.
Screening: $50-$100. Background checks, credit reports, application processing.
Your time: 15-25 hours. Showing the property, fielding inquiries, reviewing applications, coordinating the move-out inspection, managing the make-ready, executing the new lease. At any reasonable value for your time, this is another $500-$1,000 in opportunity cost.
Add it up: $3,150 to $7,600 in total turnover costs. Call the midpoint $5,000.
The Break-Even Math
Now the question becomes: how long does the $100/month increase need to stick to recover the risk of turnover?
$5,000 in turnover costs divided by $1,200 per year in additional rent equals 4.2 years.
Read that again. If your tenant leaves over a $100/month increase and you incur typical turnover costs, your new (higher-paying) tenant needs to stay for more than four years before you break even compared to having kept the original tenant at the old rate.
And that assumes everything goes smoothly. The new tenant might not be as reliable. They might cause more maintenance requests. They might leave after one year — triggering another round of turnover costs.
The $100 increase was never $1,200 in pure profit. It was $1,200 in potential revenue multiplied by the probability your tenant stays, minus the turnover cost multiplied by the probability they leave.
What the Market Is Telling You Right Now
This math matters more today than it did three years ago. During 2021-2023, rent growth was running 8-15% annually in many markets. Landlords raised rents aggressively and tenants absorbed it because they had nowhere cheaper to go.
That market is over. National rent growth has moderated to 2-4%. Vacancy rates have ticked up in most metros. Tenants have more options, and they are exercising them.
In this environment, a rent increase that was easy to push through in 2022 might trigger a move-out in 2026. Not because you're being greedy — but because the tenant has alternatives they didn't have before. The break-even math on aggressive increases has shifted dramatically against you.
The Good Tenant Premium
Here's something that never shows up on a spreadsheet but every experienced landlord knows: a good tenant is worth more than market rent.
A tenant who pays on time saves you the cost and stress of late-payment follow-up. A tenant who handles minor issues themselves — tightening a loose doorknob, replacing a furnace filter, keeping the yard clean — saves you hundreds in maintenance calls per year. A tenant who doesn't cause neighbor complaints saves you management headaches that consume hours.
Estimate this "good tenant premium" at $1,000-$3,000 per year in avoided hassle, reduced maintenance, and eliminated collection effort. It's invisible income — you never see it in your bank account, but you would absolutely feel its absence.
When you raise rent on a proven good tenant and they leave, you're not just losing $100/month and gaining turnover costs. You are also gambling that the replacement tenant will be equally reliable. That's a bet, not a certainty. And turnover mismanagement is one of the most expensive mistakes in the business.
A Framework That Actually Works
None of this means you should never raise rent. Stagnant rents in a rising market erode your returns, fail to keep pace with your own rising costs, and leave money on the table. The goal isn't to avoid increases — it's to make smart increases.
Step 1: Know Your Turnover Cost
Calculate it specifically for your property, not using generic averages. How long does it typically take to fill a vacancy in your market? What does your standard make-ready cost? What is your time worth? Plug in real numbers. This is the number that defines your risk.
Step 2: Run the Break-Even
Monthly increase multiplied by 12 equals annual gain. Turnover cost divided by annual gain equals break-even years. If the break-even is under two years, the increase is relatively low-risk. If it is over four years, you're betting on a very long tenancy to come out ahead.
Step 3: Factor In Your Market
Check current vacancy rates and days-on-market for comparable units. In a market with 2% vacancy and units leasing in under two weeks, you have more leverage. In a market with 6%+ vacancy and units sitting for a month, the tenant has the leverage. Adjust your aggressiveness accordingly.
Step 4: Assess Tenant Quality
Is this tenant worth the good-tenant premium? Do they pay on time, take care of the property, and communicate reasonably? If yes, weigh that value explicitly. A $50/month below-market rent on a great tenant can be a better deal than market rent from an unknown one.
Step 5: Pair the Increase With Value
The hidden labor of being a landlord includes relationship management — and how you present a rent increase matters as much as the amount. A $75/month increase paired with a concrete improvement ("We're upgrading the water heater this summer and resealing the driveway") has a dramatically higher acceptance rate than a $75 increase with no context.
Tenants accept increases more readily when they feel like they are getting something — even if the improvement was already in your maintenance plan.
Where Trenly Fits
Trenly tracks your property-specific turnover costs, vacancy history, and maintenance spend — so when renewal season arrives, you're not guessing at the break-even math. You're calculating it from your own data, property by property.
The best rent increase is the one your tenant says yes to. The math will tell you where that number lives.