Shared Household Calculators
Security deposit split.
Enter what each tenant paid toward the deposit, any interest you are owed, and each deduction with who it is charged to. You get each person's share back. You enter the rules; this is not legal advice. Runs in your browser; nothing is sent or stored.
Deposit, interest and deductions
Result
Fill the form and press Calculate.
Worked example
Alex and Sam each paid 600.00 and Jo paid 300.00, a 1,500.00 deposit, with 15.00 interest credited. The landlord deducts 150.00 for carpet cleaning (shared by deposit paid), 90.00 for a hole in the wall (charged to Sam) and 60.00 for cleaning (split equally). Deductions are 300.00, so 1,215.00 comes back. Alex gets 526.00, Sam 436.00 and Jo 253.00.
How it works
Refund = deposit paid + share of interest - deductions charged to you. Interest and deductions marked shared by deposit paid are divided in proportion to what each tenant paid in; equal deductions are divided evenly; a deduction assigned to one tenant is charged only to them. If a person is charged more than their deposit, the result says they owe the difference. All amounts and who is charged are your inputs: the tool applies no tenancy rules, so check your lease and local tenancy authority.
Sources and basis (checked 2026-10-08): arithmetic on the numbers you enter, with no external constants or published figures. Amounts are in whatever currency you enter. This is a calculation aid, not legal, tax or financial advice.
FAQ
How do we split a security deposit between roommates?
A fair way is to return each person what they paid in, plus their share of interest, minus the deductions caused by them or shared. This tool lets you charge each deduction to everyone or to one person.
Who pays for damage if nobody admits it?
That is for you to agree. A common choice is to split it by deposit paid or equally; the tool supports both.
Does this tell me what the landlord can deduct?
No. It is not legal advice and applies no tenancy rules. What a landlord may deduct, owe in interest or must return depends on your lease and where you live, so check your local tenancy authority.
What if a roommate paid a larger part of the deposit?
Enter what each person paid. Interest and shared deductions follow those amounts, and equal deductions ignore them.
What does a negative result mean?
The person was charged more than their deposit and interest, so they owe the difference to the others or the landlord.