Landlord calculators & tools
The numbers landlords keep re-deriving in spreadsheets: eviction cost, deposit deductions and interest, prorated rent, turnover cost. Free, no signup, and each one explains the math it's doing.
Eviction cost calculator
Total the real cost of an eviction, from lost rent to legal fees to damage beyond the deposit, and see what shortening the case by a month is worth.
Open the calculatorSecurity deposit deduction calculator
Itemize deductions line by line, see the refund owed, check your state’s return deadline, and copy a draft disposition letter.
Open the calculatorSecurity deposit interest calculator
Interest owed on a held deposit: enter the amount, rate, and holding period to get simple and annually-compounded interest side by side.
Open the calculatorProrated rent calculator
A partial month’s rent for move-ins and move-outs, computed all three ways: banker’s 30-day, actual days in month, and 365-day annualized.
Open the calculatorRental turnover cost calculator
Price a vacant unit: vacancy days times daily rent plus make-ready spend, per turn and per year, and what a tighter turn process saves.
Open the calculatorWhy these are free
Every calculator here started life inside one of our resource guides, built to answer a question landlords actually argue about: what does an eviction really cost, which proration method applies, what can I deduct from the deposit and by when. The standalone versions exist so you can get to the number without re-reading the article.
The pattern behind all of them is the same one behind DiscoveryMark itself: the landlords who win disputes are the ones who can show their math. A prorated rent figure with its formula, a deposit letter with line items and receipts, an eviction case with a clean ledger: documentation is the difference between a number a tenant accepts and a number a tenant fights. When you're ready to keep the records that back those numbers up, your first record is free.