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Rent Increase Calculator

Calculate rent increases and estimate tenant retention impact

New Monthly Rent

$1,890

Increase

+$90/mo

Increase %

5.0%

Retention

71%

$
%
%
%

New Monthly Rent

$1,890

Monthly Increase

+$90

Annual Increase

+$1,080

Increase Rate

5.0%

Retention Prob.

71%

Tenant Retention Estimate

At CPI (3%)95%
Your increase (5%)71%
At 10%20%

Estimated based on increase above inflation. Higher increases above CPI reduce likelihood of tenant renewal.

Rent Projection (5 Years)

Current$1,800/mo
Year 1$1,890/mo
Year 2$1,985/mo
Year 3$2,084/mo
Year 4$2,188/mo
Year 5$2,297/mo

Frequently Asked Questions

Q

How much should I raise rent each year?

Most landlords raise rent 3-5% annually to keep pace with inflation and market rates. The ideal increase balances maximizing income with tenant retention. Raises above 8-10% significantly increase vacancy risk and turnover costs.

  • CPI-based increase: 2-4% matches inflation (highest retention)
  • Market-rate increase: 3-7% based on comparable rents nearby
  • Aggressive increase: 8-15% risks tenant turnover ($3,000-$5,000 cost)
  • Average US rent increase was 3.5% in 2025 per Zillow data
  • Turnover cost includes vacancy, cleaning, marketing, and make-ready
Increase %Monthly on $1,800Annual ExtraRetention Risk
3%+$54+$648Very Low
5%+$90+$1,080Low
8%+$144+$1,728Moderate
12%+$216+$2,592High
Q

What are rent control limits in major cities?

Rent control caps vary by city: New York allows 2-4% for stabilized units, San Francisco caps at 60% of CPI (about 1.7% in 2025), Los Angeles caps at 3-8% depending on CPI. Many states prohibit local rent control entirely.

  • New York: RGB sets 2-4% annually for stabilized units
  • San Francisco: 60% of CPI (typically 1.5-2.5%)
  • Los Angeles: 3-8% (CPI-based, varies by year)
  • Oregon: statewide cap of 7% + CPI (about 10% total)
  • California AB 1482: 5% + CPI for non-exempt units
  • 37 states currently have rent control preemption laws
City/State2025 CapApplies ToExemptions
New York City2-4%Stabilized unitsBuildings <6 units
San Francisco~1.7%Pre-1979 buildingsSingle-family homes
Los Angeles4%RSO unitsPost-1978 buildings
Oregon~10%StatewideBuildings <15 years
Q

How does rent increase affect tenant retention?

Tenant retention drops sharply for increases above the local CPI rate. At CPI-level increases, retention is 90-95%. At 2x CPI, retention drops to 70-80%. At 3x CPI or above, expect 40-60% retention and significant turnover costs.

  • At-CPI increase (3%): 90-95% retention probability
  • Moderate above CPI (5-7%): 75-85% retention
  • Aggressive increase (8-12%): 50-70% retention
  • Extreme increase (15%+): 30-50% retention
  • Turnover costs $3,000-$5,000 per unit (vacancy + make-ready + marketing)
Increase vs CPIRetentionTurnover Cost RiskNet Effect
At CPI95%$0Optimal
CPI + 3%78%$660-$1,100Moderate
CPI + 7%55%$1,350-$2,250Risky
Q

When is the best time to raise rent?

The best time to raise rent is at lease renewal during peak rental season (May-August) when demand is highest. Most states require 30-60 days written notice before a rent increase takes effect.

  • Peak season (May-Aug): highest demand, easier to fill vacancies
  • Annual lease renewal: natural expectation point for increases
  • Required notice: 30 days for month-to-month, 60-90 days for yearly leases
  • Avoid holiday season increases (Nov-Dec): lowest rental demand
  • Consider market conditions: rising rents justify larger increases
Q

How do I calculate rent increase percentage?

Rent Increase Percentage = ((New Rent - Current Rent) / Current Rent) x 100. For example, raising rent from $1,800 to $1,890: ($1,890 - $1,800) / $1,800 x 100 = 5.0%. This equals $90/month or $1,080/year additional income.

  • Formula: (New Rent - Old Rent) / Old Rent x 100
  • Example: $1,800 to $1,890 = 5.0% increase
  • Dollar amount: $1,800 x 5% = $90/month increase
  • Annual impact: $90 x 12 = $1,080 additional yearly income
  • Compound effect: 5% annual increases double rent in ~14 years

Example Calculations

1Standard 5% Annual Increase on $1,800 Rent

Inputs

Current Rent$1,800/mo
Increase Percentage5%
Rent Control Cap0% (none)
Local CPI Rate3%
Projection Years5

Result

New Monthly Rent$1,890
Monthly Increase+$90
Annual Extra Income+$1,080
Retention Probability71%
Year 5 Rent$2,297

Increase = $1,800 x 0.05 = $90. New rent = $1,800 + $90 = $1,890. Annual extra = $90 x 12 = $1,080. Retention: increase is 2% above CPI (5% - 3%), so probability drops from 95% by 2 x 12 = 24 points to 71%. Year 5 = $1,800 x 1.05^5 = $2,297.

2Rent Control Market: 3% Cap on $2,400 Rent

Inputs

Current Rent$2,400/mo
Increase Percentage7%
Rent Control Cap3%
Local CPI Rate2.5%
Projection Years3

Result

New Monthly Rent$2,568
Monthly Increase+$168
Rent Control Limit$72/mo
Exceeds Rent ControlYes
Retention Probability41%

Proposed increase = $2,400 x 0.07 = $168. New rent = $2,568. Rent control limit = $2,400 x 0.03 = $72. The $168 increase exceeds the $72 limit. Retention: 7% - 2.5% = 4.5% above CPI, probability = 95 - (4.5 x 12) = 41%.

Formulas Used

Rent Increase Amount

Increase = Current Rent x (Increase Percentage / 100)

Calculates the dollar amount of a rent increase from the percentage.

Where:

Increase= Monthly rent increase in dollars
Current Rent= Current monthly rent amount
Increase Percentage= Desired percentage increase

Increase Percentage

Increase % = ((New Rent - Current Rent) / Current Rent) x 100

Calculates the percentage of a rent increase from dollar amounts.

Where:

Increase %= Percentage change in rent
New Rent= Proposed new monthly rent
Current Rent= Current monthly rent amount

Projected Rent (Compound Growth)

Future Rent = Current Rent x (1 + Annual Increase / 100)^Years

Projects future rent based on consistent annual increase percentage.

Where:

Future Rent= Projected rent after N years
Current Rent= Starting monthly rent
Annual Increase= Annual rent increase percentage
Years= Number of years projected

How to Calculate the Right Rent Increase

Setting the right rent increase requires balancing income growth with tenant retention. Our calculator helps landlords determine the optimal increase by considering current market rates, local rent control limits, and the estimated probability of tenant retention.

The calculator projects rent forward over multiple years using compound growth, so you can see how modest annual increases accumulate over time. A 5% increase on a $1,800 unit adds $1,080 in the first year but compounds to over $11,000 in cumulative additional income over 5 years.

Remember that tenant turnover is expensive. Lost rent during vacancy, cleaning, repairs, and marketing to find a new tenant typically costs $3,000-$5,000. A moderate increase that keeps a good tenant is often more profitable than an aggressive increase that triggers a move-out.

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Last Updated: Mar 25, 2026

This calculator is provided for informational and educational purposes only. Results are estimates and should not be considered professional financial, medical, legal, or other advice. Always consult a qualified professional before making important decisions. UseCalcPro is not responsible for any actions taken based on calculator results.

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