A rent increase notice usually lands in your mailbox as one short line — "your rent will rise by 5%" — but that single percentage quietly becomes a much larger number once you multiply it across twelve months and then across the next several renewals. This rent increase calculator turns the percentage into the actual dollars: your new monthly rent, your new annual rent, the extra cost each year, and a multi-year compound projection so you can see where you will be priced three or five renewals from now.
Adjust the sliders and every figure updates instantly. The result card separates the one-time renewal jump from the compound growth that follows if the landlord keeps raising rent by the same percentage every year.
How to Use
- Enter your Current Monthly Rent — the amount you pay today, before the proposed increase. This is the baseline everything else is calculated from.
- Type the Proposed Rent Increase as a percentage. A 3%–5% hike is common in a normal market; 10% or more is aggressive and worth negotiating.
- Set Project Forward to the number of years you expect to stay. Leave it at 1 for a simple renewal-year calculation, or push it to 3 or 5 to see the compound effect if the same percentage repeats at every lease.
The result card then breaks the change into: the dollar increase per month, your new monthly rent (highlighted), your new annual rent, the extra dollars you will pay each year, and — when you project forward — the compounded rent after N years and the cumulative jump from today's baseline.
The Math Behind the Numbers
The one-year increase is straightforward percentage math:
newMonthlyRent = currentRent × (1 + pct / 100)
On a $1,800 rent with a 5% hike, that is $1,800 × 1.05 = $1,890 per month, and the annual rent moves from $21,600 to $22,680 — an extra $1,080 per year.
The multi-year projection uses the same compound-growth formula as compound interest, because each year's increase is calculated on top of the already-raised rent:
futureRent = currentRent × (1 + pct / 100)^n
At 5% per year for three years, the multiplier is 1.05³ = 1.1576, so a $1,800 apartment grows to $2,083.73 per month by the third renewal — a cumulative jump of about $283.73 per month, or roughly $3,405 extra per year, compared with where you started. Compounding is why a "small" 5% per year does not stay small for long.
Why Multi-Year Compounding Matters
Most tenants budget only for the next renewal, but landlords in tight markets often raise rent by a similar percentage every year. A 5% hike sounds modest in year one, but over five years it compounds to about 27.6% — the same apartment you rented for $1,800 is now $2,296. Over ten years at 5%, rent climbs nearly 63%, to about $2,932. Running this projection before you sign a long lease helps you decide whether the unit is still affordable two or three renewals down the line, or whether you should start saving for a move.
Rent-controlled or rent-stabilized cities (such as New York, San Francisco, Los Angeles, and several others) cap annual increases by law, so the "Project Forward" number in those jurisdictions should be read as a stress test, not a forecast. Check your local Rent Board order for the actual allowed percentage before assuming a landlord can raise rent freely.
Examples
Example 1 — A standard renewal. You pay $1,800 per month and your landlord proposes a 5% increase for the next lease term. The calculator shows a $90 increase per month, a new monthly rent of $1,890, a new annual rent of $22,680, and an extra $1,080 per year. If you project forward 1 year (the default), the future rent matches the new monthly rent, because one year is exactly the renewal period.
Example 2 — A compounding three-year plan. Same $1,800 apartment, 5% increase, but you set Project Forward to 3 years. The one-year jump is still $90, but the projected rent after three renewals is $2,083.73 per month — the compound 1.05³ multiplier — and the cumulative increase from today is about $283.73 per month, or roughly $3,405 extra each year. This is the number to weigh against a moving-away cost.
Example 3 — A large, expensive unit. A $1,200,000-per-month penthouse (a magnifier for the math engine) at a 3% increase for 5 years adds $36,000 per month on day one and compounds to roughly $1,391,128.89 per month by year five. The point is not the absurd dollar figure — it is that the same percentage scales linearly on the first renewal and compounds on every later one, regardless of how large the starting rent is.
FAQ
How much will my rent go up in dollars?
Multiply your current monthly rent by the increase percentage and divide by 100. On $1,800 with a 5% hike, that is 1800 × 5 / 100 = $90 more per month, or $1,080 more per year. The new monthly rent is $1,890 and the new annual rent is $22,680.
Is a 5% rent increase reasonable?
It depends on your market. National average rent growth is usually in the 3%–5% range when the market is balanced; in a hot, low-vacancy city 5%–10% is common, and in a soft market landlords may hold or even cut rent. Compare the proposed percentage to your local CPI rent index and to comparable units nearby before you accept.
Should I accept the increase or move?
Compare the discounted cost of moving — application fees, security deposit, moving truck, time off work — against the discounted cost of the higher rent over the lease term. If the increase is $100 per month for a 12-month lease, that is $1,200 of extra rent; if moving costs $2,000–$3,000 out of pocket, staying may be cheaper even at the higher rent.
How do I calculate rent increase over multiple years?
Use the compound-growth formula futureRent = currentRent × (1 + pct/100)^n, where n is the number of years. At 5% per year for 3 years, 1.05³ = 1.1576, so a $1,800 apartment becomes about $2,083.73 per month. This calculator does that multiplication for you when you set Project Forward above 1.
Can a landlord raise rent by any percentage?
No. Many cities and states have rent-stabilization or rent-control ordinances that cap annual increases (often 3%–10% depending on the year), require 30- to 90-day written notice, and limit when a notice can be served. Your lease agreement and local Rent Board rules override a generic landlord demand.
What is a rent increase notice and how much notice is required?
It is a written letter from the landlord stating the old rent, the new rent, the effective date, and the percentage increase. Most US states require 30 days' notice for month-to-month tenancies, and 60 or 90 days for longer tenancies or larger increases. The notice must arrive before the lease renewal date so you have time to decide.
How does rent compounding affect my budget over 5 years?
At 5% per year, five years of compounding multiplies rent by about 1.276 — a $1,800 apartment becomes roughly $2,296 per month, a 27.6% jump even though each individual year's increase looks small. Running this projection before you sign helps you decide whether the unit will still be affordable on your expected future income.
Disclaimer
This rent increase calculator is provided for informational purposes only and does not constitute legal, financial, or tax advice. Estimates are based on the inputs you enter and the standard percentage and compound-growth formulas; actual rent increases are governed by your lease, local rent-control ordinances, state landlord-tenant law, and the specific notice your landlord serves. Always review your lease and local Rent Board rules, and consider negotiating or consulting a tenants'-rights attorney if you believe an increase is unlawful.