Inlays and onlays typically cost $650 to $1,200 per tooth, averaging around $900. Porcelain runs at the higher end; composite and gold are slightly lower. Because they treat decay or structural damage, most dental insurance plans cover a portion — often 50 to 80 percent after the deductible. With good coverage, out-of-pocket can be as low as $10 to $100.
More than a standard filling, less than a crown. Inlays and onlays sit in the middle of the restorative cost spectrum — and they’re typically the right choice for teeth that need more than a filling can support but still have enough healthy structure to avoid a full cap. The material and your insurance coverage are the two main factors in what you’ll actually pay.
Key Takeaways
- Most inlays and onlays cost $650 to $1,200 per tooth, averaging around $900
- Insurance typically covers 50 to 80 percent, depending on how your plan classifies the procedure
- With good insurance coverage, out-of-pocket can be as low as $10 to $100 per tooth
Cost by Material
The material is the single biggest variable in the final price.
| Material | Typical cost per tooth | Notes |
|---|---|---|
| Composite resin | $800-$900 | Most affordable. Tooth-colored. Shorter lifespan than porcelain. |
| Gold | $800-$1,000 | Most durable. Less common due to appearance. Favored for back molars. |
| Porcelain | $900-$1,200 | Most commonly placed. Natural appearance. Excellent durability. |
Onlays cost slightly more than inlays of the same material because they cover more of the tooth surface. The difference is usually modest — typically a few hundred dollars.
Does Insurance Cover Inlays and Onlays?
Yes, in most cases. Because inlays and onlays treat decay or structural damage, dental insurance typically covers a portion. Plans that classify them as a ‘basic’ service may cover 80 percent after the deductible. Plans that classify them as ‘major’ typically cover 50 percent. With good coverage, out-of-pocket can be as low as $10 to $100 per tooth.
The key variable is how your plan categorizes the procedure. Some plans treat inlays and onlays like fillings — in the basic service category, typically covered at 80 percent. Others treat them like crowns — in the major category, covered at 50 percent. Both are common, and coverage varies by plan.
The most reliable way to know before treatment is a pre-authorization. Your dental office submits the procedure code to your insurer before any work is done, and the insurer responds in writing with exactly what they’ll cover. No guesswork, no surprise bills.
Keep your annual maximum in mind. Most plans cap at $1,000 to $2,000 per year. If other major work has already been done in the same year, the remaining benefit may be limited.
What Affects the Final Price
Material choice. Porcelain runs higher than composite or gold. The material also affects how long the restoration lasts, so it’s worth discussing with your dentist which makes the most sense for your specific tooth.
Inlay vs. onlay. Onlays cover more of the tooth and typically cost slightly more due to additional material and lab time.
Geographic location. Dental fees in higher cost-of-living areas tend to be higher. A pre-treatment estimate from your provider removes the guesswork.
How the Cost Compares to Fillings and Crowns
Context matters when evaluating the price:
- Direct composite filling: $150-$300. One visit. Appropriate for small cavities. Lasts 5-10 years.
- Inlay or onlay: $650-$1,200. Two visits. Lab-fabricated precision fit. Lasts 10-30 years.
- Dental crown: $1,000-$1,800. Two visits. Caps the entire tooth. Lasts 10-15 years.
The inlay or onlay costs more upfront than a filling, but it lasts two to three times longer and preserves far more of the natural tooth than a crown requires. For the right situation, it’s often the most cost-effective option over time. If you have a tooth that’s been flagged for more than a filling, schedule your appointment at our Edmonds office and we’ll walk through what makes sense for your specific situation.
