Net Effective Rent Calculator

Advertised rent rarely reflects what a lease actually costs once a landlord throws in free months or other sweeteners. Net effective rent strips away that noise and gives you a single number you can budget against and use to compare apartments fairly, since the unit with the lower sticker price can end up costing more if it comes with fewer concessions.

To find it, take the full cost of the lease, monthly rent times the number of months, subtract the value of every concession the landlord offers, and divide what's left by the full length of the lease term. The calculator takes concessions as free months; to include a one-time cash incentive, divide it by the monthly rent and add the result to the free months (a $1,250 credit on $2,500 rent is 0.5 months). Written out, the math is: Net Effective Rent = [(Monthly Rent * Lease Term in Months) - Total Value of Concessions] / Lease Term in Months.

The accuracy of the result depends on capturing every concession, not just the obvious free months. A move-in bonus belongs in your concession total as well, converted to months the same way. Where people go wrong is dividing what they pay by the paid months only, which just gives back the asking rent; the total has to be spread over the full lease term.