Interest on a medical bill: state rules

Interest on a medical bill is a quiet worry. A bill sits unpaid, or you ask for a payment plan, and you wonder whether the amount will grow. Whether a hospital or collector can add interest or late fees depends on your state, on who is billing you and on what you signed. This guide lists the state rules we read in the law itself, says what the federal rule does not cover, and gives the questions to ask.

The short answer

We did not find a single national rule on this. A few states have written limits into law, and the details differ a lot: one bars interest and late fees on medical debt, others set a ceiling, and others only limit interest on a payment plan. Where no rule applies, interest or a fee may come from the financial agreement you signed or from the terms of a payment plan.

So the useful step is to ask. Ask the billing office in writing whether your account carries any interest or fee, where it comes from, and whether an interest-free option exists. Only the provider, a collector or your state regulator can confirm what applies to you.

Rules we read in the law itself

We list a rule only after reading it in the statute text on the state's own legislature site. Your state may have a rule we did not read, so a state missing from this table is not a sign that it has no rule. Laws change, so use the source link to confirm the current text.

State	Who it covers	What the text says	Read on	Source
Delaware	Large health-care facilities and medical debt collectors (section 2504J), and patients in general (section 2509J)	Large health-care facilities and medical debt collectors "may not charge any interest or late fees to patients". A separate section says patients "may not be charged interest or late fees on medical debt, regardless of any agreements to the contrary", and that this also applies to judgments resulting from medical debt. Large health-care facilities include licensed hospitals, outpatient clinics under a hospital's license or majority-owned by a hospital, and licensed freestanding emergency departments.	2026-11-08	6 Del. C. ss. 2504J(a) and 2509J
Virginia	Large health care facilities (licensed hospitals, their outpatient clinics, and practices that provide outpatient care with revenues of at least $20 million a year) and medical debt buyers	No interest or late fees on medical debt until 90 days after the due date applicable to the final invoice. After that, interest and late fees may not exceed three percent of the medical debt per year. The code page ends with the history line "2025, c. 692."	2026-11-08	Va. Code s. 59.1-612(A), s. 59.1-611
New York	General hospitals, for installment plans under their financial aid policies (low-income people without health insurance, or underinsured)	The monthly payment may not exceed five percent of the patient's gross monthly income. The interest charged on the unpaid balance, if any, may not exceed two percent, and a plan may not include an accelerator or similar clause that triggers a higher rate of interest after a missed payment.	2026-11-08	Pub. Health Law s. 2807-k(9-a)(d)
Maryland	Hospitals	A hospital's debt collection policy must bar it from charging interest on the debt owed on a bill, before a court judgment, for a patient eligible for free or reduced-cost care under its financial assistance policy. For patients who do not qualify, the statute tells a commission to write payment plan guidelines on possible interest, which may not begin before 240 days after the initial bill, and to bar penalties or fees for prepayment or early payment.	2026-11-08	Health-General s. 19-214.2(b)(12) and (d)(3)
Connecticut	Debt arising out of services provided at a hospital, in the section on interest recoverable as damages	Prejudgment and postjudgment interest "shall be no more than five per cent per year". The awarding of interest in such cases is discretionary.	2026-11-08	Conn. Gen. Stat. s. 37-3a(b)
Maine	Debt collectors, for debt they know is medical debt	The list of prohibited practices in Maine's debt collection law includes charging any interest on that debt and charging any fee in connection with collecting it. The text speaks of collectors, so it is not a statement about what the provider itself bills.	2026-11-08	Maine debt collection law, 32 M.R.S. ch. 109-A, prohibited practices, para. 3(O) and (P)

The rules cover different people: a hospital, a collector, a debt buyer, or a court awarding interest. Check the conditions in your state's row before you rely on it. We left out any state where we could not read the statute text, and any bill that is not yet a law.

Have your bill in front of you? Check it now, free. Your bill file stays on your device.

Check my bill, free

What the federal rule for nonprofit hospitals says

You may see 26 CFR 1.501(r)-5 mentioned in this context. It is not an interest rule. It is a limit on charges: a nonprofit hospital facility must limit what it charges a person eligible for its financial assistance policy. For medically necessary care, that is not more than the amounts generally billed to people with insurance. The section does not mention interest.

Why it still matters: if you qualify for financial assistance, the amount charged for your care may change, and anything added to that amount is worth asking about. Our guide to hospital charity care explains how to apply.

What if insurance has not finished with the claim?

Ask first whether the bill is final, because the amount may change. Our guide on collections while insurance is still processing covers that. Ask whether interest or a fee applies while the account is under review.

Does a payment plan add interest?

It can. Some plans carry no interest, some do, and some add fees if you miss a payment. In two of the states in the table, New York and Maryland, the statutes say something about interest on hospital payment plans, but the plan you are offered may still differ. Read the terms before you agree, ask for them in writing, and ask what happens after a missed payment.

If the bill is hard to pay, our guide on lowering a hospital bill puts the questions in the order that usually makes sense, and what to do when the billing office says no covers the next step.

What if I already paid interest or a fee?

Compare what you paid with the itemized bill. A charge that looks like interest or a fee is worth asking about. Our guide on patient refund rules lists the refund rules we read.

What to ask

Does any interest or late fee apply to my account? Ask for the amount, the date it started and the rate, on the itemized bill or in a letter.
Where does it come from? Ask whether it comes from the financial agreement you signed, and ask for a copy of the page that mentions interest.
Is there an interest-free payment plan? Ask for the monthly amount, the total, any fee, and what happens if you miss a payment.
Would financial assistance change the charges? Ask whether you qualify and whether the interest or fee would be removed or recalculated if you do.
Who is billing me? If a collector or debt buyer has the account, ask who holds it and whether the rule that applies to them differs from the hospital's.
Which state rule applies? Ask whether the billing office follows a state rule on interest, and put the answer in writing.

Keep a note of every call: date, name and what was said. If the answers do not add up, our guide on how to dispute a medical bill covers the next steps.

To see which lines on your own bill may be worth asking about, open it in MedBillCheckup. It is read on your device and the bill file stays with you. The free check shows how many things are worth asking about and names the first. The full list, with the question to ask for each line, is paid.

Want a second pair of eyes on your bill?

Check it free. Your bill file stays on your device.

Check my bill, free

Questions about this guide

Can a hospital charge interest on a medical bill?

It depends on your state, on who is billing you and on what you signed. Among the rules we read in the law itself, Delaware bars interest and late fees on medical debt, Virginia allows none for 90 days after the due date on the final invoice and then caps them at 3% a year, and New York caps interest on a hospital installment plan at 2%. Many states have no rule we could read. Ask the billing office in writing whether any interest or fee applies to your account.

Can a hospital charge a late fee on a medical bill?

In Delaware and Virginia, the rules we read treat late fees together with interest. Delaware bars both, and Virginia holds both back until 90 days after the due date on the final invoice. If your state has no such rule, a late fee may depend on the financial agreement you signed. Ask where the fee comes from and ask for the page of the agreement that mentions it.

Is there a limit on how much interest a medical bill can carry?

Only in some places. Virginia sets 3% of the debt per year for large health care facilities and medical debt buyers. New York sets 2% on the unpaid balance of a hospital installment plan under its financial aid rules. Connecticut sets 5% a year on court-awarded interest on a debt from hospital services. Maryland and Delaware go further for some patients. The table in this guide has the conditions, and your state may have a rule we could not read.

Does a hospital payment plan have interest?

Some do and some do not. Ask the billing office whether the plan is interest-free, whether any fee applies, and what happens if you miss a payment. Ask for the terms in writing before you agree. In New York and Maryland, the statutes we read say something about interest in hospital payment plans, so a plan offered in those states is worth checking against the table.

Does the federal rule for nonprofit hospitals limit interest?

We did not find an interest rule in it. The federal rule, 26 CFR 1.501(r)-5, limits the amount a nonprofit hospital charges a patient who is eligible for its financial assistance policy. It does not mention interest. If you qualify for financial assistance, ask whether the charges, including any interest or fee on the account, are recalculated.

What if my state is not in the table?

Not being in the table does not mean there is no rule. We list only rules we opened and read in the official statute text, and some state sites would not open for us. Ask the billing office what applies, and ask your state attorney general consumer office or your state insurance department.

Sources

How to lower a hospital bill, or what to do if you can’t pay
The order to ask in when a hospital bill is more than you can pay: the itemized bill, financial assistance, a payment plan, collections timing and the questions for the call.
Hospital charity care requirements and how to apply
Also called hospital financial assistance: who decides, the state rules from official sources with the federal poverty figures they use, and how to apply.
What to do if the billing office says no
What to ask after a no, a script for the next call, and the usual next official step for your situation, with its deadline rule and where to go.
How long does a provider have to refund a patient overpayment?
The patient refund rules we checked in state and federal law, who each one covers, and when the clock starts.
Sent to collections while insurance is still processing? What to ask
What federal rules say about collections while a claim is open, the separate credit report policies, four things to ask the billing office, and what to do if a collector calls.

Free tools

Itemized bill request letter
Ask the provider for every charge, line by line.
Refund request letter
Ask for a credit balance back when you paid more than your share.
Financial assistance request letter
Ask a hospital for its financial assistance policy and application form.
Charity care check
See whether you may qualify for a hospital’s financial assistance.
Letter to a collection agency
Dispute a medical debt, or ask the agency for verification.
Medical bill dispute letter
Ask the billing office about the charges you type.
Insurance claim file request letter
Ask a health plan for the documents behind a decision on a claim.
Medical bill code lookup
Medicare’s name for a drug, supply or equipment code on your bill.
Health money dates 2027
Open enrollment, FSA, Medicare and tax dates for 2027, each with its source.
Medical bill glossary
The words and abbreviations on bills and EOBs, explained.

Can a hospital charge interest or late fees on a medical bill?