A composite (tooth-colored) filling typically costs between $150 and $400 per tooth, with most single-surface fillings landing in the $200 to $300 range. The final price depends on how many surfaces of the tooth need filling, where the tooth is located, and how your dental insurance handles composite material on back teeth.
Cost by Filling Size
Dentists price fillings by the number of tooth surfaces involved. A cavity that only affects one side of a tooth is a single-surface filling, the smallest and least expensive option at roughly $200 to $400. When decay wraps around to a second or third surface, the price climbs because more material and more chair time are needed. A three-surface composite filling on a molar can run $400 to $600 or more in a private practice.
Location matters too, both in your mouth and on the map. Front teeth tend to be slightly less expensive to fill because they’re easier to access. Geographic cost of living plays a significant role: a filling in Manhattan or San Francisco will often cost substantially more than the same procedure in a rural Midwestern town.
Composite vs. Amalgam Pricing
Silver amalgam fillings cost roughly $50 to $150 per tooth, making them the budget option. Composite resin runs about two to three times higher. The price gap comes down to how the materials are placed. Amalgam is packed into a prepared cavity in one step and sets on its own. Composite requires the dentist to etch the tooth surface, apply a bonding agent, then layer the resin in thin increments of 1 to 2 millimeters at a time. Each layer gets hardened with a curing light for a few seconds before the next one goes on. This layering process adds meaningful chair time, and chair time is what drives dental costs.
Despite the higher price, composite has largely replaced amalgam in most dental offices. It bonds directly to tooth structure (amalgam just sits in a carved-out space), it matches the color of your teeth, and it doesn’t contain mercury. Many practices no longer offer amalgam at all.
What Dental Insurance Covers
Insurance coverage for composite fillings is straightforward on front teeth: most plans cover them at the standard restorative benefit, often 70% to 80% after your deductible. Back teeth are where it gets complicated. Many plans will only pay the amount they would have paid for a cheaper amalgam filling on posterior teeth. You’re responsible for the difference between the amalgam reimbursement and the actual composite cost.
As an example, if your plan covers 80% of a $100 amalgam filling, the insurer pays $80 toward your back-tooth composite. If the composite costs $250, you’d owe $170 out of pocket rather than the $50 you might have expected. Some newer or premium plans cover composite at the same rate regardless of tooth location, so it’s worth checking your specific benefit summary before your appointment.
If you don’t have dental insurance, many offices offer a cash-pay discount of 10% to 20%, or in-house membership plans that bundle exams, cleanings, and a percentage off procedures for an annual fee.
Ways to Lower the Cost
Dental school clinics are one of the most reliable ways to save. University of Louisville’s dental school, for instance, advertises student clinic prices up to 50% less than private practice rates. The tradeoff is time: appointments take longer because students work under faculty supervision, and scheduling can be less flexible. General practice residency clinics at the same institutions offer around 30% savings with faster, more experienced providers.
Community health centers that receive federal funding also offer sliding-scale fees based on income. These aren’t charity clinics with outdated equipment. They’re staffed by licensed dentists and use the same materials a private office would. You can search for one near you through the Health Resources and Services Administration website.
Dental discount plans (not insurance, but negotiated fee schedules) typically cost $80 to $150 per year and provide 15% to 40% off listed prices at participating dentists. For someone needing multiple fillings, the math can work out quickly.
How Long Composite Fillings Last
Research published in the Journal of Oral Rehabilitation found that at least 60% of composite restorations last more than 10 years when proper materials and technique are used. Many last significantly longer. The main reasons fillings eventually fail are recurrent decay forming around the edges, fractures in the filling material, and normal wear from chewing forces over many years.
Your own habits influence that timeline. Grinding or clenching your teeth (especially at night) puts extra stress on fillings and shortens their life. So does a diet high in sugar or acid, which accelerates new decay at the filling margins. Smaller fillings on teeth that bear less chewing force tend to outlast large fillings on molars.
When a composite filling does fail, it can usually be repaired or replaced without removing much additional tooth structure. That’s an advantage of the bonded material: the dentist only needs to remove the failed portion rather than carving out a larger mechanical lock the way amalgam requires.
What Affects Your Final Bill
Beyond filling size and location, a few other factors can push your total higher than the base filling cost. If your cavity is deep enough to approach the nerve, the dentist may need to place a protective liner underneath the composite, which adds to the material and time involved. X-rays taken to diagnose the cavity are usually billed separately. And if you’re a new patient, expect an exam fee on top of the procedure itself.
Ask the front desk for a predetermination before your appointment. This is a request sent to your insurance company that returns the exact dollar amount they’ll cover for the specific procedure codes your dentist plans to use. It removes the guesswork and gives you a firm out-of-pocket number before you sit in the chair.