ISP Modem Rental vs Buy Calculator

The $15-a-month fee hiding on your bill

Most ISPs charge $10 to $15 a month to rent you a modem — sometimes labeled "equipment fee" or "gateway rental." It looks small until you do the math: $15 a month is $180 a year, $360 over two years. A decent modem or gateway you buy yourself costs roughly $100 to $200 once. The rental fee is one of the purest profit lines on your bill.

How the calculator finds the breakeven

Enter your monthly rental fee, the price of the modem you would buy, and how many months you want to compare (24 is a good default). The tool totals what renting costs over that period, subtracts the one-time purchase price, and shows who wins and by how much. The breakeven month is simple: purchase price divided by monthly rental. After that month, owning is pure saving.

Worked example

Your ISP charges $15 a month; a solid modem costs $149. Over 24 months, renting totals $360 — buying saves $211, and the breakeven lands at about 9.9 months. But flip the numbers: an $8 rental and a $300 high-end gateway over 12 months means renting costs $96 while buying costs $300, so renting wins by $204. Short contracts and cheap rentals favor renting; long stays and standard modems favor buying.

Tips before you buy

First, check your ISP's approved-modem list so the box you buy actually works on their network. Second, if you have a phone line through the ISP, make sure the replacement handles voice too — some cheap modems do not. Third, remember the rental fee sometimes includes the router; buying means you own both pieces or use your own router. Finally, keep the receipt: if the modem dies in year one, warranty matters more than it did with a rental swap.