Rent Overlap Calculator
Understand the full cost of your tenancy transition. Enter your dates and costs — the calculator derives your overlap period and total transition burden.
Nothing is saved. Works entirely in your browser.
Tenancy dates
The date your current tenancy officially ends.
The date your new tenancy officially begins.
Monthly rent
Used to calculate the prorated cost of your overlap period.
Your ongoing monthly commitment from move-in day.
Upfront costs
Full tenancy deposit for your new property. Usually 5 weeks' rent.
A pre-commitment holding deposit, if applicable. Often credited toward the main deposit.
Cleaning, storage, professional fees, or other moving costs not covered elsewhere.
Added to your subtotal as a buffer for unexpected costs.
Why Overlap Happens
Most tenancy agreements don't align perfectly. Your new landlord may require possession before your current tenancy ends, or you may want a settling window. Even a few days' misalignment can mean weeks of double rent.
Why Buffers Matter
Transition costs consistently run higher than planned. Deposits not yet returned, unexpected holding deposits, and setup costs can compound quickly. A 10–15% contingency gives you room to absorb surprises.
Why Timing Is Worth Planning Early
Negotiating your start and end dates before signing is the highest-leverage action you can take. Even a one-week adjustment to either tenancy date can eliminate the overlap entirely.