What Does Dental Insurance Cover, and What Does It Leave to You?

Why Does the Annual Maximum Matter More Than the Percentages?

The annual maximum is the most your plan will pay toward your care in one plan year. Once the plan has paid that amount, it pays nothing more until the year resets, whatever tier the next procedure sits in.

That makes it the number to know before major work. A crown paid at 50 percent sounds generous until the plan's share of one crown and a root canal uses most of a modest maximum.

Most people never reach it: NADP's 2025 report found that 2.9 percent of PPO group plan enrollees did, and a 2024 analysis by the ADA Health Policy Institute put the share of patients at 3.4 percent. The ADA opposes annual maximums outright and notes that the $1,000 level many plans promote was set about 40 years ago. The maximum matters in the year you need major work.

Your deductible is the amount you pay before the plan starts paying its share, usually $50 to $100 according to NADP. Plans often leave preventive care out of it, as the Washoe County plan does.

When a treatment plan is larger than one year's maximum, ask your dentist whether any of it can safely wait until the new plan year. Sometimes it can and the second year's maximum picks up the rest. Sometimes waiting would let a problem grow, and then the treatment should not wait for the new year.

What Dental Insurance Does Not Cover

A plan can cover a procedure and still leave you a larger share of the bill than you expected. Five rules decide when: the annual maximum, waiting periods, frequency limits, the missing tooth clause and alternate benefits. Each is worth asking about before treatment.

• Anything past the annual maximum. Covered work becomes your cost once the plan has paid its ceiling for the year.
• Work done during a waiting period. The ADA defines a waiting period as the time between enrolling and becoming eligible for a given benefit. Waiting periods most often apply to major work.
• Visits beyond a frequency limit. Plans cap how often they pay for a service. The Washoe County plan, for example, allows up to four cleanings a year and a full set of X-rays once every 36 months, which is not what every plan allows.
• A tooth that was missing before your coverage began. This is the missing tooth clause. The Office of Personnel Management describes it as a limit on covering a first bridge, implant or denture that replaces teeth lost before the effective date, and it has asked federal dental carriers to drop it.
• The gap under an alternate benefit. If the plan bases its payment on a less expensive option, the difference is yours. The ADA's example is a tooth-colored filling on a back tooth paid at the rate for a silver amalgam filling.

Implants are harder to predict, because plans differ on whether and how they pay for them. Whether dental insurance covers implants depends on all of the rules above at once.

Using Your Benefits Before the Plan Year Resets

Most dental benefits run for a 12-month plan year, and when it ends the annual maximum starts over. On many plans that happens on January 1. Not on all of them, though: HealthCare.gov notes that a plan year may not match the calendar year, and the date is in your plan documents or with your employer.

What happens to money you did not use depends on the plan. The ADA's MouthHealthy guidance says unused benefits do not roll over on most plans. Some do carry part of it forward: NADP reports that 42 percent of PPO enrollees have an annual maximum rollover.

So before the year closes, four answers are worth having:

1. The date your plan year ends.
2. How much of this year's maximum is left.
3. Whether your deductible is already met.
4. Whether your plan carries any unused maximum into next year.

The dental insurance coverage quiz is a quick first pass at what your plan likely covers, and the office can confirm the details from your plan itself. Picking next year's coverage is a separate decision, covered in our open enrollment post on choosing a dental plan.