With proper care—and if you don’t gain or lose a lot of weight—you can keep your diaphragm for up to ten years, making it the best birth control value for your buck at the equivalent of 42 cents to $2.08 a month (plus the cost of [spermicide](https://www.bedsider.org/birth-control/spermicide#costs_tab)).
If you're on Medicaid, the diaphragm might be free for you. If you have private insurance, it's probably covered for no more than your copay.
If those aren't options for you, check with the [family planning clinics around you](/where_to_get_it) and find out if they offer free or low-cost birth control. Most do.
Without insurance, Medicaid, or any other assistance, the diaphragm costs $15-$75 plus the cost of fitting (which is probably less expensive at a family planning clinic like Planned Parenthood). Even at full price, it's a pretty good deal in the long run!