Metformin cost without insurance is usually about $4 to $30 a month for immediate-release generic tablets, depending on the pharmacy, dose, and whether you use a discount price. Extended-release metformin usually costs more.

The good news is that metformin is one of the cheaper prescription medications for type 2 diabetes. The less obvious part is that the price you see online may be for a different strength, formulation, or tablet count than the prescription you actually have.

If you're paying cash, compare the price for your exact dose and quantity at two or three pharmacies before you fill it.

TL;DR: Key takeaways

  • Immediate-release generic metformin usually costs about $4 to $30 a month without insurance.
  • Extended-release metformin generally costs more than immediate-release, although the difference varies by pharmacy and discount program.
  • Walmart's $4 generic list can be one of the cheapest options for immediate-release metformin.
  • Your monthly cost depends on tablet strength, tablet count, formulation, pharmacy, and discount price not just the name "metformin."
  • At 2,000 mg a day, you may need around 120 of the 500 mg tablets per month, so a price quoted for 60 tablets won't represent your full monthly cost.
  • Metformin is inexpensive, but you still need appropriate follow-up, including kidney-function and A1C monitoring.

Need a metformin refill without insurance, or have questions about your dose? Try August AI's free symptom checker to evaluate your situation in under 2 minutes, or book a $39 online urgent care visit with August AI. A US-licensed clinician can review your situation and prescribe metformin when appropriate, with same-day pharmacy pickup across all 50 states. The visit does not guarantee a prescription. For ongoing diabetes management, including A1C and kidney function monitoring, work with your primary care provider or endocrinologist.

People also ask

Not usually. Warehouse pharmacies generally serve non-members, and the metformin Costco price is quoted the same either way, but individual warehouse and state practices vary. Call the specific pharmacy first and ask two things: whether non-members can fill there, and what they charge for your exact strength and quantity. That one call saves a wasted drive.

Usually. Metformin 90 day supply cost at discount pricing commonly lands near $10 to $13 for 180 immediate-release 500 mg tablets, which undercuts three separate $4 to $5 fills and saves two trips. The requirement is a prescription written for 90 days, so ask your prescriber to write it that way at your next visit.

Metformin cost without insurance is usually $4 to $30 a month

Metformin cost without insurance is typically $4 to $30 a month for many immediate-release generic prescriptions.

Your actual cash price can be lower or higher depending on where you fill it, how many tablets you need, and whether the pharmacy or a discount program offers a lower price.

For example, a pharmacy may advertise a low price for 60 tablets of 500 mg immediate-release metformin.

If you take:

  • 500 mg once daily: 30 tablets per month
  • 500 mg twice daily: 60 tablets per month
  • 2,000 mg a day using 500 mg tablets: 120 tablets per month

So a "$4 metformin" price may apply to a particular quantity rather than your entire monthly prescription.

A 2026 comparative review in NEJM Evidence puts metformin among the lower-cost medication options for type 2 diabetes. That's one reason it remains widely used: generic metformin has been available for years and is made by multiple manufacturers.

One important distinction: the prices in this article are cash or discount-card estimates, not guaranteed quotes. Generic drug prices can change, and the same prescription can cost different amounts at different pharmacies.

People also ask

Not usually. Assistance programs are built around expensive brand-name drugs, and metformin has been generic for decades. You will spend more time on the paperwork than you would save against a $4 generic list price. Use the assistance route for insulin or a GLP-1 if you need it, not for this.

Not usually. Generic metformin contains the identical active ingredient and meets the same FDA bioequivalence standard, at a fraction of the price. Occasionally someone tolerates one manufacturer's tablet better than another's, which is a real and legitimate reason to ask your pharmacist to source a specific generic maker. That is different from paying a brand premium.

The cheapest metformin price may depend on the pharmacy

If you don't have insurance, don't assume every pharmacy charges roughly the same amount.

Two pharmacies can have noticeably different cash prices for the same generic metformin prescription. There isn't one national retail price that every pharmacy has to charge.

The CMS NADAC benchmark tracks pharmacy acquisition costs for many outpatient drugs, but that isn't the price you automatically pay at the counter.

For a low-cost medication like metformin, the simplest approach is usually to call two pharmacies and ask for the cash price for your exact prescription.

Give them the:

  • Strength
  • Immediate-release or extended-release formulation
  • Number of tablets
  • Days' supply

Instead of asking, "How much is metformin?" ask: How much is 60 tablets of generic metformin 500 mg if I'm paying cash?

That gives you a number you can actually compare.

People also ask

Considerably more. Oral liquid metformin is dispensed far less often, so fewer manufacturers make it and no $4 generic list covers it, which puts it well above the tablet tier. It exists for people who genuinely cannot swallow tablets. If that is not you, tablets are the cheaper and more widely stocked choice.

No. The savings on a drug that already costs $4 to $30 a month domestically are trivial, and personal importation adds shipping delays, uncertain sourcing, and no pharmacist you can call. The math only tempts people who have not yet checked a $4 generic list price locally. Check that first.

Metformin 500mg price without insurance: why the number you see may not match your bill

The metformin 500mg price without insurance can look very low, especially for generic immediate-release tablets. A typical cash or discount price for 60 tablets may be around $4 to $30, depending on the pharmacy and the price you qualify for.

The catch is that your monthly cost depends on how many tablets your prescription calls for.

For example:

  • 500 mg once daily: 30 tablets per month
  • 500 mg twice daily: 60 tablets per month
  • 1,000 mg twice daily: 120 tablets per month if you're using two 500 mg tablets per dose

So if you see 60 metformin 500 mg tablets for $4, that doesn't necessarily mean you'll pay $4 for your full month's supply.

The price you see online may also be:

  • The pharmacy's regular cash price
  • A discount or membership price
  • A GoodRx or other discount-card price
  • A price based on a specific tablet quantity

That's why it's better to check the price for your actual prescription quantity rather than comparing the lowest advertised number.

People also ask

No. The cash price is tied to the tablet, not your diagnosis, so a $4 list price is $4 regardless of indication. The ADA recommends considering metformin for adults at high risk of progressing from prediabetes , alongside a 5% to 7% weight-loss target. Insurance coverage, unlike cash pricing, can differ by indication. See our guide on taking metformin for weight loss .

Typical metformin cash prices by formulation

These are rough cash or discount-card ranges, not fixed national prices. Prices vary by pharmacy, quantity, manufacturer, and discount program.

Formulation Strength Rough price range for 60 tablets
Immediate-release 500 mg $4–$30
Immediate-release 850 mg $4–$35
Immediate-release 1,000 mg $4–$35
Extended-release 500 mg $15–$40+
Extended-release 750 mg $18–$45+

Treat these as comparison ranges rather than guaranteed quotes.

Walmart, Costco, Sam's Club, grocery-store pharmacies, independent pharmacies, and online discount programs can all have different prices.

Costco can be particularly competitive on generic medications. Its pricing model is also why people sometimes see lower cash prices there than at traditional retail pharmacies.

For comparison, our guide to Ozempic cost at Costco without insurance shows how much pharmacy pricing can matter when the medication itself is much more expensive.

Why does extended-release metformin cost more?

Metformin ER cost without insurance is usually higher than immediate-release metformin.

Extended-release tablets are designed to release metformin more gradually and are commonly taken once daily. That can make them more convenient for some people and may improve stomach-related tolerability for some patients.

It doesn't mean ER metformin is a stronger version of the drug. It is a different formulation of the same active medication.

The price difference depends on the specific product, manufacturer, competition, pharmacy, and discount program. At some pharmacies the gap can be fairly small; at others, it can be much larger.

So if you're paying cash and your prescription is for ER, don't assume the $4 immediate-release price applies to you.

And don't switch from ER to immediate-release on your own just to save money. The dosing schedule and tolerability can be different.

MedlinePlus explains that extended-release metformin is generally taken once daily with the evening meal and should be swallowed whole. Immediate-release tablets are generally taken more frequently with meals.

If the ER price is putting pressure on your budget, ask your prescriber or pharmacist whether a lower-cost formulation would be appropriate for you.

How much is metformin at 2,000 mg a day?

The cost of metformin at 2,000 mg a day depends on the tablet strength, formulation, quantity, and pharmacy.

For example, if you're taking immediate-release 500 mg tablets, a 2,000 mg daily dose means four tablets a day, or about 120 tablets for 30 days.

That's important when comparing prices. A pharmacy may advertise 60 tablets for $4, but if you need 120 tablets each month, your monthly cost will be higher.

If you're comparing prices, first work out how many tablets your prescription requires:

tablets per day × 30 = approximate monthly quantity

For example:

  • 500 mg once daily: 30 tablets/month
  • 500 mg twice daily: 60 tablets/month
  • 500 mg four times daily: 120 tablets/month
  • 1,000 mg twice daily: 60 tablets/month

The number of tablets isn't the only factor. Two prescriptions with the same total daily dose can have different tablet counts depending on the strength you're prescribed.

Don't change your tablet strength or dosing schedule just to get a lower price. If your metformin is becoming expensive, ask your pharmacist or prescriber whether there is a lower-cost option that fits your treatment plan.

Walmart's $4 generic list can be a useful benchmark

The metformin Walmart $4 list is one of the first prices worth checking if you're paying cash.

Immediate-release generic metformin has historically appeared on low-cost generic lists, although availability, quantity, and participating locations can change.

The advantage is simplicity: if the pharmacy's own generic price is already lower, you may not need to compare several discount cards.

But check the exact prescription.

A low-cost list may apply to immediate-release metformin while your extended-release prescription falls outside the program. The price may also apply to a specific quantity rather than every possible prescription.

Think of the $4 list as a benchmark to check, not a guarantee that every metformin prescription will cost $4.

GoodRx and other discount cards can lower the cash price

A metformin GoodRx coupon can sometimes bring the price below a pharmacy's standard cash rate.

GoodRx, SingleCare, RxSaver, and similar programs negotiate different prices with pharmacies, so there isn't one universal discount price.

If you have insurance but your copay is high, ask the pharmacy to tell you both prices:

  • Your insurance copay
  • The pharmacy's cash or discount-card price

For inexpensive generic metformin, the cash price can sometimes be lower than the insurance copay.

The trade-off is that a cash or discount-card purchase generally doesn't count toward your insurance deductible or out-of-pocket maximum.

A cheaper prescription still needs the right follow-up

Metformin is inexpensive, but the cost of the tablet isn't the only part of treatment.

The ADA's Standards of Care in Diabetes 2026 continues to include metformin among commonly used glucose-lowering medications for type 2 diabetes.

Depending on your situation, your clinician may monitor:

  • Kidney function, because metformin is cleared through the kidneys
  • A1C, to see whether treatment is controlling your blood glucose
  • Your response to the current dose
  • Side effects and tolerability
  • Vitamin B12, particularly with longer-term metformin use or when deficiency is suspected
  • Other medications or conditions that could affect your treatment

The ADA recommends regular assessment of glycemic control, with A1C generally checked at least twice a year when someone is meeting treatment goals and more frequently when treatment has changed or goals aren't being met.

Cost-related problems in diabetes are real. The ADA reports that some people with diabetes skip medications because of cost. But metformin is unusual because the generic itself is generally inexpensive.

If your problem is that you don't have a clinician or prescription, rather than that the medication costs too much, that's a different problem.

An $39 online urgent care visit with August connects you with a US-licensed clinician who can review your symptoms and medical history and decide whether a prescription is appropriate.

The visit does not replace ongoing diabetes care, kidney-function testing, or A1C monitoring.

When metformin side effects need more attention

Most people who have trouble with metformin notice gastrointestinal effects such as diarrhea, nausea, stomach discomfort, or loss of appetite.

Taking metformin with food can help, and clinicians often increase the dose gradually to improve tolerability.

Rarely, metformin can be associated with lactic acidosis, a serious condition that needs emergency care.

Get emergency help if you develop:

  • Extreme weakness or unusual tiredness
  • Trouble breathing or unusually fast or deep breathing
  • Severe vomiting or stomach pain
  • Feeling unusually cold
  • Severe dizziness
  • A slow or irregular heartbeat

MedlinePlus advises getting emergency medical help if these symptoms occur.

Contact a clinician if:

  • Diarrhea or nausea is persistent and causing you to skip doses.
  • You're running out of medication before you can get a refill.
  • You haven't had your A1C checked within the timeframe your clinician recommended.
  • You haven't had your kidney function checked as recommended.
  • Your blood glucose remains above your treatment target.

If cost is making you skip doses, tell your clinician or pharmacist. With generic metformin, there may be a cheaper pharmacy, quantity, or discount option available.

The bottom line

Metformin cost without insurance is usually low: roughly $4 to $30 a month for many immediate-release generic prescriptions. Extended-release metformin generally costs more, but the exact difference depends on the pharmacy and product.

If you're paying cash, check the metformin Walmart $4 list, compare the cash price at another pharmacy, and check a metformin GoodRx coupon if needed.

Most importantly, compare the price for your actual prescription. A $4 price for 60 tablets doesn't tell you what 120 tablets will cost, and a low immediate-release price doesn't necessarily apply to extended-release metformin.

Metformin may be cheap. The monitoring shouldn't be skipped. Kidney function, A1C, dose adjustments, and appropriate follow-up are still part of taking it safely.

Frequently Asked Questions

No.

Metformin is available as a generic medication, and the cash price for immediate-release tablets can be quite low. Some pharmacies offer low-cost prescriptions, while others may charge considerably more.

You don't need insurance to ask for a cash price or use a legitimate prescription discount program.

The low-cost generic price is generally intended for people paying cash, but the exact drugs, quantities, and participating locations can change.

Ask the pharmacy whether your exact strength, formulation, and tablet count qualify.

Don't assume that an immediate-release metformin price automatically applies to extended-release tablets.

You can generally compare a metformin GoodRx coupon price with your insurance copay and use whichever legitimate price is lower.

You generally can't combine the two on the same prescription claim.

Remember that paying with a discount card rather than insurance usually means the purchase won't count toward your deductible.

For most people, yes.

Generic metformin contains the same active ingredient and must meet FDA requirements for approval. Brand-name Glucophage is rarely worth paying a premium for when an appropriate generic is available.

If you notice that you tolerate one manufacturer's tablets differently from another's, ask your pharmacist about available manufacturers rather than automatically switching medications.

It can be for some people.

Extended-release metformin may be easier to take because it is commonly taken once daily, and some people find it easier on their stomach.

But that doesn't mean everyone needs it.

If metformin ER cost without insurance is significantly higher than your immediate-release prescription, ask your clinician whether immediate-release metformin would be an appropriate alternative.

Don't make the switch yourself.

You need a prescription for metformin in the United States.

If you don't currently have a clinician, telehealth may be a convenient way to start the process. A clinician can review your history and determine whether metformin is appropriate.

An online visit does not replace the blood tests and ongoing monitoring that may be needed once you're taking it.

The cash price of the tablet doesn't usually depend on why it was prescribed. A generic 500 mg tablet doesn't become more expensive because of the diagnosis.

Insurance coverage can be different, however, depending on the diagnosis and plan.

The ADA discusses metformin for people at high risk of developing diabetes, particularly alongside lifestyle changes and weight loss.

If you're considering taking metformin for weight loss, talk with a clinician about whether it is appropriate for your situation rather than choosing a dose based on price.

It can be.

A 90-day prescription may have a lower total cost per tablet than three separate 30-day fills, but the actual metformin 90 day supply cost depends on the pharmacy, quantity, discount program, and prescription.

Ask the pharmacy to quote both a 30-day and 90-day supply rather than assuming the larger quantity is cheaper.

Usually, they aren't necessary for generic metformin.

Patient assistance programs are more commonly used for expensive brand-name medications. With generic metformin, checking the pharmacy's cash price, a low-cost generic list, or a legitimate discount card is usually more practical.