Tooth Filling Cost in 2026: By Material, Surfaces and State

Price the exact code on your treatment plan

A filling quote is a CDT code: the material, the number of surfaces and whether the tooth is a molar or a front tooth decide which one, and the code decides the price band and how a plan reimburses it. Set the four selectors, add your state, and, if you carry insurance, keep the downgrade box ticked unless your plan has confirmed in writing that it pays the composite rate on back teeth.

Tooth filling cost by material and surfaces (2026 benchmarks)

The two biggest price drivers are what the filling is made of and how many surfaces of the tooth are rebuilt. The ranges below are compiled from the 2024 Synchrony/ASQ360° procedural cost study, deliberately free of any single clinic's commercial framing so you can compare materials on one scale.

What Medicaid actually pays for a filling (2023-2024)

Medicaid pays dentists $83 per claim line (national weighted average, 2023-2024) for a 2-surface back-tooth composite filling (CDT D2392) — well below the $226 cash average for a comparable composite filling above.

Medicaid pays $83 for this filling code; most offices charge cash patients $226: that gap is the reason only 20% of active dentists actually billed Medicaid in 2023-2024.

Why "surfaces" is the number that moves your bill

You went in for a "small cavity" and left with a charge for a "3-surface resin." That is not a markup — dentists bill by how many faces of the tooth they rebuild, because each surface adds material and chair time. Think of a back tooth as a cube with a biting top plus four sides:

• 1 surface (CDT D2391) — decay on a single face, usually the biting surface. The cheapest filling in any material.
• 2 surfaces (D2392) — the top plus one side (an MO or DO cavity).
• 3 surfaces (D2393) — through the tooth front-to-back (an MOD cavity). Structurally the weakest, and the one most likely to need a crown later.

In the same material, each added surface typically adds $50-$90, so a 3-surface filling commonly runs $100-$180 more than a 1-surface one. This is why two patients with the "same cavity" can get very different quotes.

Amalgam vs composite: what you actually pay for

Composite costs more because it is bonded layer by layer, cured with a blue light and shaped to blend in — more chair time and pricier materials than packing silver amalgam. The trade-off is appearance and a more conservative prep, not longevity: amalgam and gold both last longer.

Glass ionomer, gold and ceramic inlays

Beyond the two common direct fillings, three other materials appear on quotes:

• Glass ionomer ($116-$285) — releases fluoride and bonds without heavy drilling, but is softer; often used at the gumline, in children, or as a temporary fix. Shortest lifespan, around 5 years.
• Gold inlay/onlay ($361-$817) — a lab-made restoration cemented in over two visits. Extremely durable (10-30 years) but visible and costly.
• Porcelain/ceramic inlay/onlay ($755-$1,774) — tooth-colored, stain-resistant and lab-made; the step between a large filling and a full crown.

Gold and ceramic are technically inlays/onlays rather than direct fillings, which is why they cost several times more — they are custom-milled or cast in a lab, not placed in a single visit.

With and without insurance: the real math

Most dental plans classify fillings as basic restorative care and pay 50-80% after your deductible, up to your annual maximum. On a national-average $226 composite, an 80% plan leaves about $45 out of pocket after the deductible; a 50% plan leaves about $113.

The table below puts the cash price beside the modeled out-of-pocket cost on a typical 80% plan (after a met deductible), by material and surface count, so you can see the real gap rather than a single average:

Insured figures assume the deductible is already met and the plan pays 80% of an in-network fee; a 50% plan roughly doubles your share. On posterior composite, apply the downgrade adjustment below before trusting the insured column.

The trap on back teeth is the downgrade clause. Many insurers will only pay the amalgam rate for a posterior tooth even when you choose composite, classifying the white material as cosmetic. The plan reimburses the dentist the silver rate (say ~$160) and you pay the difference up to the composite fee. Always ask the front desk: "Does my plan downgrade composite on molars?" before treatment.

HSA and FSA dollars are pre-tax, so they cut the real cost by your tax rate — useful when a plan downgrades or you have already hit the annual maximum.

Is buying insurance worth it for one filling? Usually not by itself. A single filling saves roughly $45-$180 with an 80% plan, but a standalone policy runs $300-$600 a year in premiums, frequently carries a 6-12 month waiting period on basic restorative care, and still applies a deductible. For one isolated filling, paying cash or using a no-waiting-period dental savings plan is normally cheaper. Insurance pays off only when the same plan year also covers your cleanings, exams and any larger work (a crown or root canal) that pushes total billed fees well past the annual premium.

Replacing an old filling

Fillings do not last forever. Composite fails at roughly 3-11% per year — about double the amalgam rate — usually from new decay forming at the edges (secondary caries) or from cracks. Dry mouth accelerates both, which is why we costed out the repair side of the dental damage attributed to Ozempic and other GLP-1 drugs separately. A replacement costs about the same as the original in the same material ($108-$439), because the dentist removes the old material and re-fills the same surfaces.

If a filling falls out and leaves a sensitive cavity open over a weekend, a drugstore temporary filling material can plug the gap for a day or two until you can be seen — it keeps food and cold air off the exposed dentin without the harm super glue would do.

As an Amazon Associate, Real Dental Costs earns from qualifying purchases. Some links below are affiliate links — buying through them costs you nothing extra and helps fund our independent cost research. Recommendations are editorial and never paid placements.

The decision point: when a failing filling has undermined more than about a third to half of the tooth, re-filling is too weak and the dentist steps up to an inlay/onlay or a crown to hold the tooth together. Large 3-surface (MOD) fillings on molars are the most common ones that eventually cross that line.

Related guides

Frequently asked questions