Monthly apartment budget formula

Available rent = take-home pay - debts - utilities - insurance - savings - living buffer

The main calculator uses that structure to compare your rent target with take-home pay. This is often more practical than using only gross income.

Apartment budget checklist

RentBase monthly rent plus any required monthly fees.
UtilitiesElectric, gas, water, trash, internet, and renter insurance.
Cash bufferGroceries, transportation, savings, debts, and emergencies.

Move-in budget formula

Move-in cash = first month rent + deposit + fees + moving costs + setup buffer

Application fees, deposits, pet fees, elevator reservations, movers, furniture, and utility setup can all arrive before the first normal month begins.

Use both checks: A rent can pass the 30 percent rule and still fail the move-in cash check.