A rent increase calculator helps tenants understand the real financial impact of a rent hike and helps landlords set increases within legal guidelines. Whether you're a renter budgeting for next year or a landlord calculating a fair increase, this tool delivers the numbers instantly.
How to Use This Calculator
- Enter your current monthly rent.
- Enter the percentage increase (e.g., 5%) or the dollar increase you want to apply.
- Optionally enter the lease term to see total annual impact.
- Click Calculate to see new rent, monthly increase, and total additional annual cost.
What This Calculator Measures
- New monthly rent — Current rent plus the increase amount.
- Monthly dollar increase — How much more you pay each month.
- Annual additional cost — Monthly increase × 12, showing the full yearly impact.
- Cumulative impact — Total extra cost over the lease term or multiple years.
Formula or Logic
Monthly Increase = Current Rent × (Increase % ÷ 100)
New Monthly Rent = Current Rent + Monthly Increase
Annual Additional Cost = Monthly Increase × 12
For multi-year projections with compound increases, apply each year's percentage to the previous year's rent.
Example Calculations
Example 1: Current rent = $1,800/month. 6% increase → New rent = $1,908. Monthly increase = $108. Annual additional cost = $1,296.
Example 2: Rent = $2,500/month. Landlord applies $150 flat increase. Effective % increase = 6%. Annual additional cost = $1,800.
Understanding Your Results
Many jurisdictions cap annual rent increases at CPI (Consumer Price Index) or a fixed percentage (e.g., California's AB 1482 caps at 5% + local CPI, up to 10%). Always check your local rent control laws before implementing or disputing an increase.
Common Mistakes to Avoid
- Not checking local rent control or stabilization ordinances before setting increases.
- Confusing a percentage increase on base rent vs. on the total rent including utilities.
- Failing to provide required written notice (typically 30–60 days before increase takes effect).
- For tenants: not negotiating — many landlords are open to phased increases for good tenants.