Medical payment plan or medical credit card: the deferred-interest math, month by month
The difference that matters is deferred interest. On the CFPB's own example of a $2,400 bill with a six-month promotion, paying $400 a month costs nothing extra on a medical credit card, but paying $300 leaves $600 at the end of the promotion plus $222.67 of back interest at the 26.99 percent the CFPB calls typical, and the card costs $259.04 in interest before it is paid off. The same $300 a month on a general card at 16 percent costs $155.28. A provider's own plan with no interest costs nothing, if its terms are in writing.
This is a cost comparison, not financial advice, and the examples use the CFPB's published example and invented payment amounts. Interest is simplified to a monthly accrual on the opening balance, while real cards compute it daily. Get the terms of any plan or card in writing before you agree, and confirm your price in writing before service.
Four things called a payment plan
People use "payment plan" for four different arrangements, and they differ most in who the creditor is and how interest works. The CFPB's page on medical credit cards and payment plans describes a medical credit card as one used only to pay for medical services, and notes that some health care providers also offer payment plans or lines of credit directly or through other lenders. With a plan from a lender, payments go to the financing provider, which reimburses the medical provider. That is the structural change that matters later in a dispute: the bill becomes a loan.
| Arrangement | Who you owe | Interest to check for | What to confirm in writing |
|---|---|---|---|
| Provider's own payment plan | The hospital or practice | Whether any interest or fee applies at all | Number of payments, amount of each, what happens after a missed payment |
| Installment loan arranged through the provider | A lender, who pays the provider | The APR and fixed fees | That the lender, not the provider, holds the debt |
| Medical credit card | The card issuer | Deferred interest at the end of a promotion, then a high standard APR | Promotion length and the exact payment needed to clear the balance in time |
| General-purpose credit card | The card issuer | The card's ordinary APR on the balance | That interest begins at once unless a promotion applies |
What the CFPB found about medical financing
The CFPB's report on medical credit cards and financing plans, published May 4, 2023, gives the numbers that frame the comparison. The APR of the typical medical credit card is 26.99 percent, and the mean for all general-purpose credit cards at the time was about 16 percent. Many medical cards offer deferred or springing interest for six to eighteen months, and if a balance remains at the end, the cardholder is charged all the interest that would have accrued since the original purchase date. The report found that people paid about $1 billion in deferred interest on healthcare charges from 2018 to 2020, on almost $23 billion of expenses and over 17 million purchases.
Two further findings bear on the choice. The report cites a New York Attorney General finding that 65 percent of medical credit cards are signed in medical providers' offices, which suggests the decision is often made at the desk, before the bill has been checked. And it says patients who should be eligible for reduced or free care through a financial assistance program or their insurance plan may instead be signed up for a medical card or loan, and that many people would be better off without these products because the financial burden can be higher and the ability to challenge an inaccurate bill is complicated when working through a third-party institution. The CFPB's conclusion on the product itself is balanced. For the majority of patients who pay off the full balance in time, deferred-interest financing can be advantageous. For those who cannot, the cost substantially exceeds that of other available credit.
The same $2,400, month by month
The CFPB's own illustration is a root canal and crown costing $2,400 on a card with a six-month promotion, paid at $400 a month. The tables extend that example with stated inputs. The medical card has 26.99 percent deferred interest. The general card has 16 percent, charged from the first month. Payments are made at the end of each month. First, the medical card paid on schedule:
| Month | Payment | Balance after payment | Interest charged to you |
|---|---|---|---|
| 1 to 6 | $400.00 each | $0.00 after month 6 | $0.00 |
| Total | $2,400.00 | $0.00 |
Now the same card with $300 a month, $100 short of what clears the balance in six months. Interest accrues quietly during the promotion, month by month, on each month's opening balance, and none of it is charged unless a balance remains:
| Month | Opening balance | Interest accrued in the background | Payment | Balance after payment |
|---|---|---|---|---|
| 1 | $2,400.00 | $53.98 | $300.00 | $2,100.00 |
| 2 | $2,100.00 | $47.23 | $300.00 | $1,800.00 |
| 3 | $1,800.00 | $40.49 | $300.00 | $1,500.00 |
| 4 | $1,500.00 | $33.74 | $300.00 | $1,200.00 |
| 5 | $1,200.00 | $26.99 | $300.00 | $900.00 |
| 6 | $900.00 | $20.24 | $300.00 | $600.00 |
The six background amounts add up to $222.67. Because $600 remains at the end of month 6, the promotion's protection is lost and the $222.67 is added, so the balance becomes $822.67. From month 7 the card charges its 26.99 percent on that balance.
| Month | Opening balance | Interest charged | Payment | Balance after payment |
|---|---|---|---|---|
| 7 | $822.67 | $18.50 | $300.00 | $541.17 |
| 8 | $541.17 | $12.17 | $300.00 | $253.34 |
| 9 | $253.34 | $5.70 | $259.04 | $0.00 |
Total paid is $2,659.04, which is the $2,400 bill plus $259.04 of interest: $222.67 deferred, then $18.50, $12.17 and $5.70. Now the general card, same bill, same $300 a month:
| Option | Months to pay | Total paid | Interest |
|---|---|---|---|
| Provider's own plan, no interest (terms invented) | 8 | $2,400.00 | $0.00 |
| Medical card, deferred interest at 26.99%, 6-month promotion | 9 | $2,659.04 | $259.04 |
| General card at 16%, interest from month 1 | 9 | $2,555.28 | $155.28 |
| Medical card paid at $400 within the promotion | 6 | $2,400.00 | $0.00 |
Three things follow. First, the medical card is the lowest-cost card option when paid in time and the highest-cost when it is not: the $103.76 gap between $259.04 and $155.28 is what missing the date costs in this example. Second, the general card is not free, since paid at $400 a month it would accrue $118.63 of interest and take seven payments, by this arithmetic, which is the price of the flexibility. Third, a provider plan that charges nothing beats both, which is why the first question to any billing office is whether it has one. The provider-plan row is an invented term, not a typical one, and the CFPB report notes that medical cards and loans have largely replaced the low- or no-cost informal payment plans that providers once offered directly.
The minimum-payment trap on a longer promotion
The same arithmetic with a twelve-month promotion shows why the payment needed matters more than the payment requested. Many accounts show a minimum payment that is lower than the amount that clears the balance in time. Suppose the card requires $150 a month and the promotion lasts twelve months. After twelve payments of $150, $1,800 has been paid and $600 of the $2,400 remains. The interest accrued in the background over those twelve months at 26.99 percent is $425.10, which is added, so the balance at the end of the promotion is $1,025.10. The payment that would have cleared it was $200 a month, which is the bill divided by the number of promotion months.
| Promotion length | Monthly payment that clears $2,400 in time |
|---|---|
| 6 months | $400.00 |
| 12 months | $200.00 |
| 18 months | $133.33 |
The test is to divide the balance by the number of months in the promotion, set up that payment, and treat any lower payment shown on the statement as the card's minimum rather than a plan. Pay the last month with a margin, since a balance of a few dollars still triggers the whole accrued interest.
How a small shortfall scales: the cliff in the payment
The deferred-interest design has a cliff, and a table makes it visible. Keep the $2,400 bill, the six-month promotion and the 26.99 percent rate, and vary only the monthly payment. The right-hand column shows what the same payment would cost on a general card at 16 percent.
| Monthly payment | Left at month 6 | Back interest added | Total interest, medical card | Total interest, general card |
|---|---|---|---|---|
| $400 | $0.00 | None charged | $0.00 | $118.63 |
| $375 | $150.00 | $197.37 | $205.18 | $125.81 |
| $350 | $300.00 | $205.80 | $220.94 | $134.07 |
| $325 | $450.00 | $214.23 | $237.98 | $143.63 |
| $300 | $600.00 | $222.67 | $259.04 | $155.28 |
| $250 | $900.00 | $239.54 | $316.07 | $185.56 |
| $200 | $1,200.00 | $256.41 | $408.47 | $232.88 |
The first two rows are the cliff. Paying $25 a month less than the clearing payment leaves $150 at the end of the promotion and triggers $197.37 of back interest, which is more than the $150 left. From there, each additional $25 of shortfall adds only about $8 of back interest, because most of the accrued interest was already triggered by the first dollar left over. The pattern is why the CFPB's description of the product is "all the interest that would have accrued since the original purchase date" rather than "interest on what is left": the size of the penalty is set by the whole bill, not by the shortfall. For a household that expects its payments to be uneven, the table says the general card's higher steady cost may be the lower risk. For a household that can hold the clearing payment every month, the medical card's zero interest is the lower cost, and a provider's own plan is lower still.
A larger bill: $6,000 over eighteen months
The medical card's penalty grows with the bill and the promotion length, because more interest accrues in the background. Use an invented $6,000 balance and an eighteen-month promotion at 26.99 percent, against a general card at 16 percent. The payment that clears the promotion exactly is $6,000 divided by 18, or $333.33, and that figure hides a trap. Eighteen payments of $333.33 total $5,999.94, which leaves six cents. Whether a lender would charge deferred interest on a six-cent balance depends on the agreement, and nobody should find out. The safe move is to round up to $334 a month.
| Monthly payment | Medical card, 18-month deferred interest | General card at 16% |
|---|---|---|
| $334 | Paid in 18 months. Interest $0.00. Total $6,000.00 | About 21 months. Interest $904.95. Total $6,904.95 |
| $300 | $600.00 left at month 18, plus $1,396.75 of back interest. Paid off in 26 months. Interest $1,587.94. Total $7,587.94 | 24 months. Interest $1,025.40. Total $7,025.40 |
| $250 | $1,500.00 left at month 18, plus $1,568.80 of back interest. Paid off in 33 months. Interest $2,132.11. Total $8,132.11 | 30 months. Interest $1,279.44. Total $7,279.44 |
The table has two readings. At the exact payment, the medical card wins by $904.95 in interest. At $300 the general card wins by $562.54 in interest, and at $250 by $852.67. The break-even is the payment itself: a household that is certain of the larger payment has a lower-cost card, and one that is not certain has a higher-cost one. Because the table is arithmetic on invented inputs, it says nothing about which household is which. It says what the risk costs.
The report's own numbers on how often promotions fail
The CFPB analyzed data it obtained from deferred-interest lenders, and found that 20 percent of healthcare purchases on deferred-interest products between 2018 and 2020 resulted in interest being charged. The table shows the promotion payoff rate it reports, meaning the share of deferred-interest promotions that were repaid in full before the deferred-interest period ended, by credit score band.
| Credit score band | 2018 | 2019 | 2020 |
|---|---|---|---|
| Superprime | 90% | 90% | 90% |
| Prime | 75% | 76% | 76% |
| Near-prime | 68% | 70% | 70% |
| Subprime | 65% | 70% | 69% |
| Deep subprime | 67% | 79% | 80% |
| Overall | 78% | 78% | 76% |
The report also states that, in 2020, the average purchase on a deferred-interest healthcare promotion was $1,341 across all consumers. And among promotions that did incur deferred interest, the interest assessed amounted to about 23 percent of the initial purchase amounts in 2020, a share the report calls fairly consistent across score ranges. Applied to that average purchase, 23 percent is $308.43, and applied to this page's $2,400 example it is $552.00. Those are the report's measured share applied to stated amounts, and they sit above the $259.04 of the $300-a-month case because that case left only a quarter of the bill unpaid. The report's footnote on promotion length adds that in 2020 about 38 percent of the volume of healthcare deferred-interest promotions had periods of 12 to 17 months, about 37 percent more than 18 months, and the remaining roughly 25 percent 6 to 11 months.
What the report's sample of lenders shows
Appendix A of the report samples the terms that medical card and loan companies advertised on their websites in early 2023. It is a snapshot, not a current price list, and the report cautions that the terms might not reflect the contracts. The sample covers APRs from 0 percent up to 35.99 percent. It covers term lengths running from a few weeks on short plans to as long as 60 months on installment loans, and the report says terms for medical loans and cards range from three to 60 months. Some products in the sample advertise a promotional period, and the report notes that a product with a promotional period incurs deferred interest at its end. Some require a hard credit check to apply and some do not. Some charge a flat administrative fee, and some require a down payment. The report adds that many medical financing companies do not vary the price of credit by the borrower's credit score and offer a single flat APR. The practical reading is that the agreement in front of you is the only reliable source for its own terms, and that two products that both say "no interest" can be built differently.
What to ask the billing office about its own plan
A plan run by the hospital or practice is the simplest arrangement to evaluate, because the terms are the provider's to state. The questions below are the ones the CFPB's guidance and the comparison above point to.
- Is there any interest or fee on the plan, in any month?
- How many payments, of what amount, and on what dates?
- If a payment is late or missed, what happens to the account, and who is notified?
- Is the plan with the hospital itself, or is a lender or a billing company involved?
- Can I set up the plan and still apply for financial assistance, and does applying pause collection while it is considered?
- Can I pay it off early without penalty?
- Will you put the terms in writing before I sign?
A provider that offers a no-interest plan has an incentive to keep the account in house, since it gets paid over time without a lender in the middle. A provider that offers only a third-party product is offering a different thing, and the CFPB's description of the arrangement, in which payments go to the financing provider which reimburses the medical provider, is the one to hold in mind.
Reading the agreement before you sign
The CFPB advises confirming that the product covers your service and that your provider accepts it, reading the terms to understand when interest may start to accrue or change, and asking whether you or your provider will pay any processing or administrative fees. Those points become a short list of lines to find in the agreement.
| Line to find | What to look for |
|---|---|
| Interest type | The words "deferred interest" or "if paid in full" mean back interest on the whole purchase if a balance remains. "0% APR" without those words means none accrues during the promotion |
| Promotion length | Months, and the exact end date |
| Standard APR | The rate after the promotion, and whether it can change |
| Payment that clears the balance | Balance divided by promotion months, compared with the stated minimum |
| Fees | Processing, administrative or late fees, and who pays them |
| Who the creditor is | The lender or issuer, not the provider, and how to dispute a charge with it |
| What it covers | Whether it covers this service and this provider, and any other charges |
If the agreement cannot be shown before signing, or the desk will not state the promotion's end date and the payment that clears it, that is the answer to whether to proceed that day. Taking the paperwork home for a day costs nothing for most bills, and the plan's terms should be in writing in any case.
Settle these first: the bill, then assistance, then the loan
The order of operations matters more than the choice between the two products. The CFPB's page on these products says to check first whether a provider is required to offer financial assistance based on income, noting that nonprofit hospitals, and some private hospitals, must provide free or reduced-fee care, and that signing up for a financing product first may make it harder to get that assistance. Applying for assistance first keeps the option open, and a bill reduced by assistance is a smaller balance to finance. The guide on hospital financial assistance explains how to apply, and the guide on what happens when a hospital bill goes unpaid shows how long a nonprofit hospital must wait before it can take collection steps, which is the time available for these steps.
Accuracy comes second. The CFPB report notes that disputing a bill is harder once it sits with a lender, so a patient should have the itemized bill checked, the insurer's statement compared with it and any error corrected first. The guides on checking an itemized bill and reading an explanation of benefits cover those steps. Price is third: a hospital or practice is sometimes willing to reduce a balance or accept a prompt payment, as described in the guide on negotiating a hospital bill. Only after those three does the payment arrangement itself come up.
Payment plan or card: questions asked most
Is a deferred-interest promotion the same as 0% APR?
No. With a true 0% APR, no interest accrues during the promotion and none is added when it ends. With deferred interest, interest accrues in the background from the purchase date and is added to the balance if the full amount is not paid by the end. The CFPB describes the result this way: if the balance is not paid off in time, interest accrues on the full amount charged, rather than only on the remaining amount due.
What interest rate does the CFPB report for medical credit cards?
In its May 2023 report, the CFPB says the APR of the typical medical credit card is 26.99 percent, against a mean APR of about 16 percent for all general-purpose credit cards at the time of the report. Individual cards and plans vary in APR and in the length of the special financing period, so the agreement's own APR is the figure to read.
Can I still dispute the bill after putting it on a card or loan?
The CFPB report says a patient's ability to challenge an inaccurate bill is complicated when working through a third-party financial institution. The safer order is to settle the bill's accuracy first, by requesting the itemized bill and checking it against the insurer's statement, and to finance only the amount that remains.
What if I am not sure I can pay it all within the promotional period?
Then a deferred-interest product carries the risk the arithmetic below shows, and a provider's own plan or a general credit card may cost less if you fall short. The CFPB report found that about 80 percent of healthcare promotions were paid off in time over 2018 to 2020, with payoff rates of 76 percent in 2020, and lower for people with lower credit scores, which means roughly one promotion in five ended with interest charged.
Does every card or plan cover every medical service?
No. The CFPB advises confirming that the product covers your service and that your provider accepts it, since some cover only elective or specific services. It also advises reading the terms to learn when interest may start to accrue or change, and asking whether you or your provider will pay any processing or administrative fees.
Does a hospital have to offer help before I borrow?
The CFPB says nonprofit hospitals, and some private hospitals, must provide free or reduced-fee care, and advises checking whether your provider is required to offer financial assistance based on your income before choosing a financing product. The guide on hospital financial assistance explains how to ask and what the clocks are.
Reports and dates behind the figures
Consumer Financial Protection Bureau, Medical Credit Cards and Financing Plans (May 4, 2023), https://files.consumerfinance.gov/f/documents/cfpb_medical-credit-cards-and-financing-plans_2023-05.pdf. The live address returned an access error to automated requests, so the text was read from the Internet Archive's copy of the report, read October 23, 2026. CFPB, What should I know about medical credit cards and payment plans for medical bills?, https://www.consumerfinance.gov/ask-cfpb/what-should-i-know-about-medical-credit-cards-and-payment-plans-for-medical-bills-en-1827/, read October 23, 2026. The $2,400 example, six-month promotion and 26.99 and 16 percent rates come from the CFPB report. The $300 and $150 payments, the twelve-month promotion and the provider-plan terms are invented. Interest is computed as a monthly accrual on the opening balance, a simplification of the daily accrual that cards use.