A fourth-quarter deductible carryover is a plan provision that lets medical expenses applied to your deductible in the last three months of the plan year also count toward the following year’s deductible, so a big fall or winter bill doesn’t lose all its value when the calendar flips. It isn’t required by federal law. It shows up in some employer-sponsored plans and rarely in individual marketplace coverage, and the exact rules live in your plan documents.1HealthCare.gov. Benefit Year
Which Expenses Qualify
For a calendar-year plan, the qualifying window is October 1 through December 31.2BlueCross BlueShield of Tennessee. Amendment to Evidence of Coverage for 4th Quarter Deductible Carryover Provision Insurers use the date of service, not the date the bill arrives or the date you pay it. A surgery on September 28 belongs entirely to the current year even if the invoice lands in October.
If your employer’s plan year doesn’t match the calendar, the “fourth quarter” means the last three months of that plan year instead.3HealthCare.gov. Plan Year A July-to-June plan puts the qualifying window in April through June. Confirm the dates in your plan document before assuming.
For elective care, the window matters. A follow-up visit or imaging study scheduled for October 2 can generate carryover credit; the same appointment on September 28 cannot.
How the Credit Actually Applies
The provision only touches dollars that hit your deductible. Spend $800 on covered services in November with $800 still remaining on your deductible, and that $800 does double duty: it finishes off this year’s deductible and posts as $800 toward next year’s.2BlueCross BlueShield of Tennessee. Amendment to Evidence of Coverage for 4th Quarter Deductible Carryover Provision
If you already met your deductible earlier in the year, fourth-quarter bills are paid through coinsurance or copays. Those dollars weren’t applied to the deductible, so there’s nothing for the carryover rule to roll forward. A $2,000 November bill after an August deductible payoff typically generates zero carryover credit.
When the deductible is only partly met, the math splits. Say $500 remains and you incur a $1,200 bill in October. The first $500 satisfies this year’s deductible and also posts to next year’s. The remaining $700 is billed under the current year’s coinsurance or copay rules and does not carry over.
What the Carryover Does Not Do
Carryover credits generally apply only to next year’s deductible, not to the out-of-pocket maximum.2BlueCross BlueShield of Tennessee. Amendment to Evidence of Coverage for 4th Quarter Deductible Carryover Provision Your spending toward the out-of-pocket cap resets fully at the start of the new plan year regardless of what happened in October, November, or December. Coinsurance and copays continue after you clear the deductible, up to that cap, and carryover only shortens the first part of that path.
The credits are also tied to a specific plan, not to you. Switch employers or carriers and the credits do not follow. No federal rule forces a new insurer to honor another plan’s accumulator.
Confirming Your Plan Has the Provision
Individual coverage bought through HealthCare.gov or a state exchange generally does not include carryover; the benefit year runs January 1 through December 31 with a hard reset.1HealthCare.gov. Benefit Year Among employer-sponsored plans, whether the feature exists depends on how the plan was written. Three documents govern the answer:
- The Summary of Benefits and Coverage (SBC), a standardized federal disclosure that sometimes mentions carryover but often lacks the fine print.4eCFR. 45 CFR 147.200 – Summary of Benefits and Coverage and Uniform Glossary
- The Summary Plan Description (SPD), where ERISA-governed employer plans usually spell out how deductibles accumulate and reset.
- The Evidence of Coverage or Certificate of Coverage, the full insurer contract with the definitive dates and qualifying rules.
Look for sections labeled “Deductible,” “Accumulation Period,” or “Carryover Provisions.” HR or the insurer’s member portal should have copies. For ERISA plans, the plan administrator must furnish the SPD and other governing documents within 30 days of a written request.5U.S. Department of Labor. Reporting and Disclosure Guide for Employee Benefit Plans
HDHPs and HSA Eligibility
A carryover provision does not disqualify a High Deductible Health Plan from HSA eligibility. The IRS defines HDHP status by whether the plan meets minimum deductible and maximum out-of-pocket thresholds written into the contract, not by how credits accumulate between years.6Internal Revenue Service. Publication 969, Health Savings Accounts and Other Tax-Favored Health Plans The plan’s stated deductible stays the same regardless of your personal carryover balance, so your HSA contributions remain safe.
Job Changes, Mid-Year Switches, and COBRA
Leaving an employer or switching carriers wipes the slate. Because the credits belong to the plan, they don’t move with you to a new carrier’s coverage.
COBRA is the exception. When you elect COBRA, the coverage must match what similarly situated active employees receive under the same plan, which means any carryover provision the plan already contains continues to apply during your COBRA period.7U.S. Department of Labor. FAQs on COBRA Continuation Health Coverage for Workers
Switching between plan options offered by the same employer during open enrollment is a coin flip. Some employers arrange credit transfers between plans from the same carrier; others don’t. Ask the benefits department in writing before you finalize the election, because this detail is buried in plan documents and rarely surfaces until someone loses money on it.
Checking That the Credits Posted
Once the new plan year starts, pull up an Explanation of Benefits from January and look at the year-to-date deductible tracker. If the carryover ran correctly, credits from October through December spending should already be reflected. A zero balance is the signal that something didn’t process.
Call member services with the specific claim numbers and dates of service from the qualifying window in hand. The representative can check whether the claims system applied the carryover logic or whether a manual reprocessing is needed, which usually takes 30 to 60 days. Take down the representative’s name and the call reference number every time. That paper trail matters if the issue escalates.
Appealing a Denied or Missing Credit
If the insurer refuses to correct the credits or denies them outright, you can file a formal appeal. ERISA plans must give you written notice with the specific reasons for the denial.8Office of the Law Revision Counsel. 29 USC 1133 – Claims Procedure You then have at least 180 days from receiving that notice to submit your appeal.9U.S. Department of Labor. Benefit Claims Procedure Regulation FAQs
Send the appeal with your fourth-quarter EOBs showing the qualifying expenses, the plan language that describes the carryover provision, and any notes from earlier calls with member services. If the plan has a second level of internal review, you are entitled to a reasonable chance to use it before the plan can treat the matter as closed. File complete the first time. Piecemeal submissions drag out the process.