Metformin Cost Without Insurance in 2026: What You'll Pay and How to Save

<p>Metformin is one of the most prescribed medications in the United States — and one of the most affordable. As the first-line oral treatment for type 2 diabetes, it has been off-patent for decades, meaning generic versions are widely available at a fraction of the cost of brand-name drugs. In 2026, most patients can get a 30-day supply of generic metformin without insurance for <strong>$4 to $20</strong> depending on the pharmacy, dose, and whether they use a discount card.</p> <p>This guide breaks down the exact cost of metformin at every major pharmacy, explains how the extended-release (ER) version compares in price, and shows you the fastest ways to cut your out-of-pocket cost to the lowest possible amount.</p> <h2>How Much Does Metformin Cost Without Insurance in 2026?</h2> <p>Generic metformin 500 mg is one of the cheapest medications available in the United States. The average retail price for 60 tablets (a standard 30-day supply at twice-daily dosing) is approximately <strong>$15–$28</strong> without insurance or discounts. However, with a free discount card, that price drops dramatically at most pharmacies.</p> <table> <thead> <tr><th>Pharmacy</th><th>Retail Price (60 tabs, 500 mg)</th><th>With Discount Card</th></tr> </thead> <tbody> <tr><td>Walmart</td><td>$9.00</td><td>$4.00 (Walmart $4 list)</td></tr> <tr><td>Kroger / Dillons</td><td>$17.56</td><td>$5.79</td></tr> <tr><td>CVS Pharmacy</td><td>$19.21</td><td>$13.36</td></tr> <tr><td>Walgreens</td><td>$25.57</td><td>$13.33</td></tr> <tr><td>Costco Pharmacy</td><td>~$8.00</td><td>~$6.00</td></tr> <tr><td>Rite Aid</td><td>~$22.00</td><td>~$10.00</td></tr> </tbody> </table> <p><strong>Walmart is the clear price leader</strong> for metformin. The retailer includes metformin 500 mg, 850 mg, and 1,000 mg on its <a href="https://www.walmart.com/cp/4-prescriptions/1078664" target="_blank" rel="noopener">$4 Prescription Program</a>, making it the cheapest option for most patients — no insurance, no coupon needed.</p> <h2>Metformin Cost by Dose</h2> <p>Metformin is available in several doses. The most common are 500 mg, 850 mg, and 1,000 mg tablets. Higher doses cost slightly more at retail but remain among the cheapest medications available.</p> <table> <thead> <tr><th>Dose</th><th>Tablets (30-day supply)</th><th>Avg. Retail Price</th><th>Lowest Price (Discount Card)</th></tr> </thead> <tbody> <tr><td>500 mg</td><td>60 tablets (twice daily)</td><td>$15–$28</td><td>$4–$7</td></tr> <tr><td>850 mg</td><td>60 tablets (twice daily)</td><td>$18–$35</td><td>$5–$9</td></tr> <tr><td>1,000 mg</td><td>60 tablets (twice daily)</td><td>$20–$40</td><td>$6–$10</td></tr> <tr><td>500 mg ER</td><td>30 tablets (once daily)</td><td>$25–$50</td><td>$7–$15</td></tr> <tr><td>750 mg ER</td><td>30 tablets (once daily)</td><td>$30–$55</td><td>$8–$18</td></tr> <tr><td>1,000 mg ER</td><td>30 tablets (once daily)</td><td>$35–$60</td><td>$10–$20</td></tr> </tbody> </table> <h2>Metformin Immediate-Release vs. Extended-Release: Is There a Cost Difference?</h2> <p>Metformin comes in two formulations: immediate-release (IR) and extended-release (ER, also called XR). The IR version is taken two or three times daily with meals; the ER version is taken once daily and is generally better tolerated from a gastrointestinal standpoint.</p> <p>The ER formulation costs slightly more than IR at retail — typically <strong>$25–$60 per month</strong> without a discount card, compared to $15–$28 for IR. However, with a discount card, the difference narrows significantly. Both formulations are generically available and covered by most insurance plans at the lowest tier (Tier 1) copay.</p> <p>One important note: the brand-name ER version, <strong>Glucophage XR</strong>, costs dramatically more — up to $300+ per month without insurance. There is no clinical reason to choose brand-name over generic for most patients.</p> <h2>Does Insurance Cover Metformin?</h2> <p>Yes — metformin is one of the most universally covered medications in the United States. It appears on virtually every insurance formulary as a Tier 1 (preferred generic) drug, meaning most insured patients pay <strong>$0–$10 per month</strong> as a copay. Medicare Part D plans also cover metformin at the lowest cost-sharing tier.</p> <p>If you have insurance but your plan charges more than $10/month for metformin, it is worth calling your plan to confirm the correct tier placement, or asking your pharmacist to run it as a cash-pay transaction with a discount card — the discount card price is often lower than the insurance copay for inexpensive generics.</p> <h2>How to Get Metformin for Free or Near-Free Without Insurance</h2> <h3>1. Walmart $4 Prescription Program</h3> <p>Walmart's $4 program covers metformin 500 mg, 850 mg, and 1,000 mg for a 30-day supply and $10 for a 90-day supply. No membership, no coupon, no insurance required. This is the single cheapest option for most patients.</p> <h3>2. Free Prescription Discount Cards</h3> <p>Free discount cards from RxGo, GoodRx, and SingleCare are accepted at over 70,000 pharmacies nationwide and can reduce metformin costs by 50–80% at most chains. These cards are free to use and require no enrollment.</p> <p>Use the <a href="/savings">RxGuide free savings card</a> to compare prices at pharmacies near you and find the lowest available price for your specific dose.</p> <h3>3. 90-Day Supply</h3> <p>Filling a 90-day supply instead of 30 days typically reduces the per-dose cost by 20–30% at most pharmacies. Many mail-order pharmacies (including those through insurance plans) offer 90-day supplies at a further discount.</p> <h3>4. Mark Cuban's Cost Plus Drugs</h3> <p><a href="https://costplusdrugs.com" target="_blank" rel="noopener">Cost Plus Drugs</a> (costplusdrugs.com) offers metformin 500 mg for approximately <strong>$3–$5 for a 90-day supply</strong> — among the lowest prices available anywhere. Shipping is $5 flat. This is an excellent option for patients without insurance who can plan ahead.</p> <h3>5. Manufacturer Patient Assistance Programs</h3> <p>Because metformin is a generic drug with no single manufacturer, there is no brand-name PAP. However, <a href="https://www.needymeds.org" target="_blank" rel="noopener">NeedyMeds.org</a> and <a href="https://www.rxassist.org" target="_blank" rel="noopener">RxAssist.org</a> maintain databases of state and nonprofit programs that can provide free or reduced-cost metformin to qualifying low-income patients.</p> <h2>Metformin vs. Other Diabetes Medications: Cost Comparison</h2> <p>One of the most compelling arguments for metformin as first-line therapy is its cost advantage over every other diabetes medication class. The contrast with newer agents is stark.</p> <table> <thead> <tr><th>Medication</th><th>Class</th><th>Monthly Cost (No Insurance)</th></tr> </thead> <tbody> <tr><td><a href="/cost/metformin">Metformin</a></td><td>Biguanide</td><td>$4–$20</td></tr> <tr><td><a href="/cost/glipizide">Glipizide</a></td><td>Sulfonylurea</td><td>$10–$30</td></tr> <tr><td><a href="/cost/sitagliptin">Sitagliptin (Januvia)</a></td><td>DPP-4 inhibitor</td><td>$400–$550</td></tr> <tr><td><a href="/cost/empagliflozin">Empagliflozin (Jardiance)</a></td><td>SGLT2 inhibitor</td><td>$500–$650</td></tr> <tr><td><a href="/cost/semaglutide">Semaglutide (Ozempic)</a></td><td>GLP-1 agonist</td><td>$900–$1,100</td></tr> <tr><td><a href="/cost/tirzepatide">Tirzepatide (Mounjaro)</a></td><td>GIP/GLP-1 agonist</td><td>$900–$1,100</td></tr> </tbody> </table> <p>For patients who need additional glycemic control beyond metformin, the <a href="/drug-class/glp-1-agonists/cost">GLP-1 agonist cost comparison</a> and <a href="/drug-class/sglt2-inhibitors/cost">SGLT2 inhibitor cost comparison</a> pages show the full range of options and savings strategies for those drug classes.</p> <h2>Is Metformin Covered by Medicare?</h2> <p>Yes. Metformin is covered by Medicare Part D and most Medicare Advantage plans at the lowest cost-sharing tier. Most Part D plans charge <strong>$0–$5 per month</strong> for metformin. If you are in the Medicare coverage gap ("donut hole"), generic drugs like metformin are discounted by 75%, keeping costs very low.</p> <h2>Frequently Asked Questions</h2> <h3>How much is metformin at Walmart without insurance?</h3> <p>Metformin is on Walmart's $4 prescription list. A 30-day supply of metformin 500 mg, 850 mg, or 1,000 mg costs $4, and a 90-day supply costs $10 — no insurance or coupon required.</p> <h3>Can I get metformin for free?</h3> <p>Metformin is not typically available for free, but at $4/month at Walmart or $3–$5 for a 90-day supply at Cost Plus Drugs, it is effectively the lowest-cost prescription medication available. State pharmaceutical assistance programs may cover the cost entirely for qualifying low-income patients.</p> <h3>Is metformin ER more expensive than regular metformin?</h3> <p>Yes, slightly. Metformin ER (extended-release) costs $25–$60/month at retail vs. $15–$28 for immediate-release. With a discount card, ER costs $7–$20/month. Both are generically available and far cheaper than brand-name Glucophage XR.</p> <h3>Does GoodRx work for metformin?</h3> <p>Yes. GoodRx and other free discount cards like RxGo reduce metformin costs by 50–80% at most pharmacies. The lowest GoodRx price for metformin 500 mg is approximately $6.78 for 60 tablets. The <a href="/savings">RxGuide savings card</a> compares prices across all major discount programs.</p> <p><em>Prices listed are estimates based on publicly available pharmacy pricing data as of early 2026. Actual prices vary by location, dose, and pharmacy. Always verify current pricing with your pharmacist or a discount card tool before filling your prescription.</em></p>