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Last updated: 19 September 2026
A Medicare Premium Bill, Form CMS-500, means Medicare expects you to pay certain premiums directly instead of taking them from a Social Security or Railroad Retirement Board payment. The bill can cover Part A, Part B, and Part D income-related charges. If the bill becomes delinquent, your Medicare coverage can be at risk.
Bottom Line: Read every CMS-500 bill as soon as it arrives. Medicare says bills are due on the 25th of the month, and Medicare must receive the payment by the due date. If the top says Delinquent Bill, pay the full amount due by the listed deadline or contact Medicare and Social Security immediately if you cannot or if the amount looks wrong. Do not assume Medicare Easy Pay, Social Security withholding, or a partial payment will protect coverage until the agency confirms it.
Urgent Help if Coverage Is at Risk
- Delinquent Bill: Check the Total Amount Due, Due In Full By, and any Coverage Termination Date. Medicare’s current CMS-500 sample says the delinquent label appears when a payment is 90 days past due.
- You can pay now: Medicare says paying through your secure Medicare account is the fastest option. Use the official online payment instructions and save the confirmation number.
- You cannot pay in full: Call 1-800-MEDICARE at 1-800-633-4227 and Social Security at 1-800-772-1213. Ask what exact amount must be received to prevent termination and whether a good-cause or other relief process applies.
- Coverage already ended: Contact Social Security right away. The official CMS-500 instructions tell people whose Part A or Part B coverage was canceled for nonpayment to contact a local Social Security office.
Start Here
- Identify the bill. Confirm that it says “Medicare Premium Bill” and CMS-500. A private Medicare Advantage, Part D, or Medigap bill follows different rules.
- Check the amount and date. Compare the total due, coverage period, last payment received, and due date with your records.
- Pay or call before waiting. If the bill is correct, use a payment method that can arrive on time. If it is wrong or unaffordable, call before the deadline and keep notes.
Quick-Reference Table
| Notice or problem | What it means | Best first move |
|---|---|---|
| CMS-500 | Medicare is billing you directly for Part A, Part B, and/or Part D IRMAA. | Check the total due and coverage period. |
| Delinquent Bill | The account is seriously past due and coverage may end. | Pay the full amount due or call the same day. |
| Easy Pay statement | Medicare plans to withdraw the premium from your bank account. | Confirm the amount and keep enough money in the account. |
| Private plan bill | A Medicare Advantage, Part D, or Medigap company is billing you. | Call the plan or insurer; do not use CMS-500 rules automatically. |
| IRMAA looks wrong | Social Security may be using income information that no longer reflects your situation. | Check the Social Security notice and ask whether an IRMAA reduction request fits. |
What Has Changed
This September 2026 review rechecked the core billing rules against current Medicare, CMS, and Social Security sources. The standard 2026 Part B premium remains $202.90 a month. Medicare still requires CMS-500 payments by the 25th and says Medicare Easy Pay can take 6 to 8 weeks to start.
The article now makes one important distinction clearer: a delinquent CMS-500 bill, a private Medicare Advantage or Part D plan premium, and Part D IRMAA do not use the same nonpayment rules. This matters because the office to call, grace period, and risk to coverage can differ.
Know Which Medicare Bill You Got
The official Medicare premium bill is Form CMS-500. Medicare uses it when you pay Medicare directly for a Part A premium, Part B premium, and/or the Part D Income-Related Monthly Adjustment Amount, usually called Part D IRMAA.
Read the summary of charges. The bill shows current premiums, past-due premiums, and the coverage months being billed. It may also show Part B IRMAA or a late-enrollment penalty as part of the Part B amount. Part D IRMAA appears separately because it is paid to the government, not to your drug plan.
Use 2026 amounts only as a reasonableness check. Medicare lists the standard Part B premium at $202.90 a month in 2026. If you must buy Part A, the 2026 premium is $311 or $565 a month, depending on work history. Your bill can be higher because it may cover several months, past-due charges, IRMAA, or a late-enrollment penalty. Check current amounts on Medicare’s 2026 cost page.
Helpful tip: A Medicare Summary Notice is not a premium bill. It explains claims for Original Medicare. If you are sorting several Medicare papers, the GFS guide to read an MSN can help you keep claims notices separate from premium bills.
Why Medicare May Bill You Directly
Medicare’s current premium payment guide says people who are not getting Social Security or Railroad Retirement Board benefits are billed by Medicare. Billing frequency depends on what you owe.
- Part B only: Medicare normally bills every 3 months. This includes Part B IRMAA if it applies.
- Premium Part A: Medicare normally bills every month.
- Part D IRMAA: Medicare normally bills every month.
A bill may include more than one month or a past-due amount.
If your Part B premium is higher because of income, Social Security determines the IRMAA amount. Review the official 2026 premium chart. If retirement, work loss, divorce, death of a spouse, or another qualifying life-changing event reduced household income, our guide on appealing IRMAA explains the next steps.
How to Pay Without Losing Time
Medicare says all CMS-500 bills are due on the 25th of the month. Medicare must receive the payment by the date on the bill. Its current instructions recommend submitting payment at least 5 business days before the due date.
| Method | How it works | Reality check |
|---|---|---|
| Medicare account | Pay by card, HSA card, checking, or savings through the secure Medicare account. | Medicare calls this the fastest method. Checking or savings payments may take about 5 business days; card payments process faster. |
| Medicare Easy Pay | Automatic withdrawal from checking or savings each month. | Good for future bills, but setup can take 6 to 8 weeks. |
| Bank bill pay | Your bank sends payment to CMS Medicare Insurance. | Some banks mail a paper check. Start early and verify the Medicare number and amount. |
| Send the coupon with check, money order, or an allowed card payment. | Mail takes longer. Include the coupon; if it is missing, write your Medicare number on the check or money order. |
For bank bill pay, follow Medicare’s bank payment details. For mail, use the address and coupon on your bill, and sign any card-payment coupon.
Do not send cash. Keep the bill and proof of payment.
How Medicare Easy Pay Works
Medicare Easy Pay is free. Once active, it usually withdraws the premium on the 20th or next business day and adjusts when the Medicare premium changes.
It does not start immediately. Setup can take 6 to 8 weeks. Until deductions begin, pay any CMS-500 bill another way. Do not ignore a bill because enrollment is pending.
You can enroll or change the bank account online. For paper enrollment, use the official SF-5510 form. Bank changes can also take 6 to 8 weeks.
If a withdrawal is rejected, Medicare sends a letter and the next bill may include the unpaid amount. Pay the full amount due before assuming Easy Pay will restart.
What Happens When a Payment Is Missed
A late payment usually appears as a past-due amount on a later bill. If the account becomes seriously overdue, the bill can be marked Delinquent Bill. Medicare’s current CMS-500 sample says that label appears when payment is 90 days past due. A delinquent bill may also show a coverage termination date.
Do not pay only the new month’s premium unless Medicare tells you that is enough. Medicare tells people with a Delinquent Bill to pay the total amount due. A partial payment may not stop termination if the full past-due amount is required.
For Part B, Social Security policy allows an additional 90-day extension of the normal grace period, up to 180 days total, when good cause is established and the overdue premiums are paid as required. The official good-cause policy says good cause involves circumstances outside the person’s control or circumstances they could not reasonably guard against.
Reality check: Low income alone does not automatically establish good cause. Social Security’s policy says an unexpected financial emergency may be considered, depending on the facts. If affordability is the main problem, apply for cost help immediately instead of waiting for a delinquent bill.
If the Bill Is Wrong or Too High
Compare the bill with your Social Security notice, bank records, and prior CMS-500 bills. Look for a missed payment, IRMAA change, penalty, or several months billed together.
If IRMAA is the issue, Social Security lets people request a lower IRMAA after certain life-changing events. The official IRMAA request page explains the SSA-44 process and the evidence Social Security may need.
If the premium itself is unaffordable, a Medicare Savings Program may pay Part B premiums and, in some cases, other Medicare costs. Medicare’s MSP rules list 2026 federal income and resource guidelines but also warn that state rules can be more generous. The GFS Medicare Savings Programs guide explains QMB, SLMB, QI, and QDWI in plain language.
The GFS Medicare help checker can help you decide whether MSP or Extra Help is worth checking. The agency decides eligibility.
| Problem | Help to ask about | Important limit |
|---|---|---|
| Part B premium is unaffordable | QMB, SLMB, or QI | Your state decides eligibility and may use rules different from the federal limits. |
| You owe a Part A premium | QMB or QDWI, depending on your situation | QDWI is for a narrow group of working people with disabilities. |
| Drug costs are too high | Extra Help | Extra Help lowers Part D costs; it does not erase an unrelated CMS-500 balance. |
| You have Medicare and Medicaid | State Medicaid and MSP coordination | Billing and premium handling can take time to update after eligibility changes. |
Medicare’s Extra Help page gives 2026 limits; the GFS Extra Help guide explains the program. If you have Medicare and Medicaid, see our dual-eligible guide.
Do Not Mix Up Different Premium Bills
Part D IRMAA is not your drug plan premium. CMS says Part D IRMAA is paid to the government. Under the 2026 enrollment rules, people who fail to pay Part D IRMAA have a three-month initial grace period before CMS disenrolls them from their Medicare Advantage drug plan or stand-alone Part D plan. Review the current 2026 CMS guidance if you need the technical rule.
Private Medicare Advantage and Part D plan premiums follow plan rules. A plan may choose to disenroll members for nonpayment, but if it uses that policy, CMS requires a grace period of at least two whole calendar months and proper notice. The exact plan policy may be longer, so call the plan and read its notices.
Medigap is separate again. Your Medigap insurer bills its own premium, and the Medicare Advantage/Part D grace-period rule does not automatically apply to Medigap. Medicare also says you must keep paying Part B premiums to keep Medigap coverage.
If drug expenses are making it hard to pay other bills, the Prescription Payment Plan can spread certain Part D out-of-pocket drug costs across the year. It does not pay a CMS-500 premium bill.
Caregiver Help and Paperwork
A trusted person can help organize bills and make a payment. Medicare generally needs the beneficiary’s permission before discussing private account information with that helper.
Medicare lets a beneficiary give permission online or use the Authorization to Disclose Personal Health Information form, CMS-10106. Medicare lists that form on its other Medicare forms page.
Keep one premium folder with:
- the latest CMS-500 and any Delinquent Bill;
- Social Security premium or IRMAA notices;
- Easy Pay approval, rejection, or bank-change letters;
- bank records, confirmation numbers, canceled checks, or money-order receipts;
- private plan or Medigap premium bills;
- a call log with date, office, representative, and reference number;
- permission paperwork if a caregiver will speak with Medicare.
How to Start Without Wasting Time
- Take a photo of the bill. Capture both sides and the payment coupon before mailing anything.
- Check payment history. If you have a Medicare account, look at the premium payment history before paying a suspected duplicate.
- Choose one payment route. Avoid starting Easy Pay and then assuming a current bill disappeared.
- Call about errors quickly. Ask what the bill covers, whether the payment deadline remains in force, and what amount must post to protect coverage.
- Apply for cost help early. If the premium is hard to afford every month, start MSP or Extra Help screening before another bill becomes late.
Reality Checks
- Easy Pay is not an instant rescue for a delinquent bill.
- Bank bill pay can still result in a mailed paper check. Build in extra time.
- A Medicare bill can cover several months, so a large total is not automatically an error.
- IRMAA, MSP, or Medicaid changes may take time to appear on a bill.
- A private plan’s grace period does not make a delinquent CMS-500 safe to ignore.
- If mail stopped after a move, verify your address with Social Security. Missing a bill does not erase the premium.
Common Mistakes to Avoid
- Paying only the newest month when a Delinquent Bill requires the total amount due.
- Assuming Social Security withholding has started without checking a benefit statement or Medicare account.
- Assuming an Easy Pay application means current bills can be ignored.
- Confusing Part D IRMAA with the drug plan’s own premium.
- Using a private plan’s grace-period rules for a CMS-500 bill.
- Mailing a card payment coupon without signing it.
If Coverage Ended or Is About to End
Act immediately. If Part A or Part B was terminated for nonpayment, contact Social Security and ask whether good-cause reinstatement or another relief path applies. Use the Social Security locator if you need a local office.
Social Security’s good-cause rules look at why the payment was missed, whether the problem was outside your control, and whether overdue premiums can be paid within the allowed period. Examples can include serious illness, a reasonable belief that payment had been made, or an agency mailing or billing error. Each case is decided on its facts.
If reinstatement is not available, ask Social Security when you can re-enroll and whether a Special Enrollment Period applies. CMS says the regular General Enrollment Period for Part B and premium Part A is January 1 through March 31, with coverage generally starting the month after enrollment. See the official Part A and B rules.
If losing coverage creates other urgent problems, the GFS emergency help guide lists food, utility, housing, and local crisis routes.
For help avoiding a future enrollment penalty after a gap, see the GFS guide to Medicare late penalties.
Official and Free Help
- Medicare billing: Call 1-800-MEDICARE (1-800-633-4227). TTY: 1-877-486-2048. Medicare’s contact page also lists current help options.
- Social Security: Call 1-800-772-1213 for Part A or Part B termination, IRMAA, benefit withholding, and Social Security address issues.
- SHIP: Use the SHIP finder for free, one-on-one Medicare counseling in your state.
If you want a plain-language guide to who does what, the GFS article on SHIP and SMP help explains where to turn for counseling, fraud questions, and Medicare problems.
Phone Scripts You Can Use
For a Delinquent Bill
“I received a CMS-500 marked Delinquent Bill. The total amount due is ____. The due date is ____. What exact amount must be received to stop my Part A or Part B coverage from ending, and which payment method will post fastest?”
For Easy Pay not starting
“I signed up for Medicare Easy Pay, but I still received a bill. Is Easy Pay active on my account? Do I need to pay this bill another way while I wait?”
For a high bill
“Please explain each charge on this bill by coverage month. Does it include Part A, Part B, IRMAA, a late-enrollment penalty, or a past-due amount?”
For coverage already ended
“My Medicare coverage ended after unpaid premiums. The payment was missed because ____. Can I request good-cause reinstatement or other relief? What proof and payment are required, and what is my deadline?”
Resumen en Español
Revise la factura CMS-500 el mismo día que llegue. Medicare usa esta factura cuando usted paga ciertas primas directamente. Las facturas vencen el día 25 del mes. Si dice Delinquent Bill, su cobertura puede estar en riesgo.
No ignore la factura mientras espera Easy Pay. Medicare dice que Easy Pay puede tardar de 6 a 8 semanas en comenzar. Si la cantidad parece incorrecta, llame a Medicare al 1-800-633-4227. Si la Parte A o la Parte B ya terminó por falta de pago, llame al Seguro Social al 1-800-772-1213.
Si no puede pagar la prima cada mes, pregunte por los Medicare Savings Programs y Extra Help. Estos programas tienen reglas de ingresos y recursos, y el estado o la agencia responsable decide si usted califica.
Frequently Asked Questions
What is a CMS-500 Medicare bill?
CMS-500 is the Medicare Premium Bill for people who pay Medicare directly for a Part A premium, Part B premium, and/or Part D IRMAA. It is different from a private Medicare Advantage, Part D, or Medigap premium bill.
When is a Medicare premium bill due?
Medicare says CMS-500 bills are due on the 25th of the month. Medicare must receive your payment by the due date, so it recommends submitting payment at least 5 business days early.
Does Medicare Easy Pay start right away?
No. Medicare says Easy Pay can take up to 6 to 8 weeks to start. Keep paying any bill that asks for payment until automatic deductions are actually active.
Can I pay only part of a Delinquent Bill?
Do not assume a partial payment will protect your coverage. Medicare tells people with a Delinquent Bill to pay the total amount due. If you cannot pay in full, call Medicare and Social Security before the deadline and ask what is required.
Is Part D IRMAA my drug plan premium?
No. Part D IRMAA is an income-related amount paid to the government. Your Part D or Medicare Advantage plan may also charge its own premium separately.
What if Medicare coverage already ended?
Contact Social Security right away. Ask whether good-cause reinstatement or another relief path applies, what overdue amount must be paid, what proof is needed, and what deadline applies. If reinstatement is not available, ask when you can re-enroll.
About This Guide
Sources: This guide uses official federal, state, local, and other high-trust nonprofit and community sources linked in the article.
Editorial note: This guide is produced under the GFS Editorial Standards using official and other high-trust sources. GFS is not affiliated with a government agency and is not a substitute for official agency guidance. Individual eligibility outcomes cannot be guaranteed.
Corrections: Despite careful verification, errors may occur. Readers may email info@grantsforseniors.org with corrections.
Disclaimer: This article is for informational purposes only and is not legal, financial, medical, tax, disability-rights, immigration, or government-agency advice. Program rules, policies, funding, and availability can change. Readers should confirm current details directly with the responsible official program before acting.
Last updated: 19 September 2026 · Next review: 19 January 2027
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