Financial Calculators
Security Deposit Calculator
Estimate a rental security deposit and first month move-in total from monthly rent and deposit months locally in your browser.
Enter the monthly rent and the required deposit in months of rent to see the deposit amount and the first month move-in total. This calculator runs privately in your browser; your numbers are not uploaded or stored.
See the deposit and move-in total before you sign.
Enter the monthly rent and the required deposit in months of rent to see the security deposit amount and the first month move-in total. This private browser estimate is for general planning only, not financial advice; your values are not uploaded or stored.
Frequently Asked Questions
Everything you need to know about this tool, how it works, and privacy.
What formula does the security deposit calculator use?
It uses security deposit = monthly rent x deposit months and move-in total = monthly rent + security deposit. For example, 1500 rent with a 1-month deposit gives a 1500.00 deposit and a 3000.00 move-in total.
Which inputs are accepted?
Enter a monthly rent greater than zero through 1000000000 and a deposit from 0 to 3 months of rent. Displayed amounts are rounded to two decimal places.
Does this include fees, last month rent, or local deposit limits?
No. It estimates the deposit and first month move-in total only from the two inputs. Application fees, last month rent, pet deposits, utilities, and state or local deposit caps are not included, so check your lease and local rules and treat the result as a planning starting point.
Do my values stay private, and is this financial advice?
Yes. The calculation and copy action run locally in your browser. CodeASystem does not upload or store the values you enter. This is a general planning estimate, not financial advice.