Four Weeks Is Not a Calendar Month: Comparing GLP-1 Prices

A $199 four-week supply and a $199 calendar-month subscription do not cover the same length of time. Four weeks is 28 days. Thirteen four-week supplies cover 364 days, while twelve calendar months cover a year. Compare the billed total and the covered period before deciding which advertised price is lower.

The distinction is not proof that one seller is misleading you. A once-weekly prescription may naturally be packaged in four doses, while care membership renews monthly. The purchasing problem is that those two clocks can coexist in one program. A useful comparison keeps the medication's days of supply separate from the dates your card is charged.

Start with the time unit, then do the arithmetic

Here is a hypothetical flat-price comparison, with no fees or dose changes. Twelve $199 calendar-month payments total $2,388. Thirteen $199 four-week purchases total $2,587 and cover 364 days. The difference is $199, but the covered periods are not exactly equal: the four-week example is one day short of a 365-day year. These are illustrations, not quotes from a particular provider.

For a common 365-day budgeting period, multiply the four-week price by 365 divided by 28. At $199, the resulting supply-cost equivalent is about $2,594.11, or $216.18 per calendar month when divided by twelve. That is a normalized comparison, not an actual invoice or permission to buy fractional refills. Exact cash charges depend on the starting date, renewal schedule and when refills are ordered.

For clarity, thirteen automatic renewals spaced 28 days apart do not mean every calendar year contains exactly thirteen card charges. A purchase on day zero and another on day 364 can put fourteen charge dates inside a 365-day window, with the last purchase covering time beyond that window. List actual payment dates when cash flow matters.

A 28-day vial does not prove automatic 28-day billing

The current CLYR review illustrates why supply and billing need separate labels. Its checked semaglutide product page describes a 28-day vial and a one-time purchase with no automatic renewal. A two-vial starter offer covers 56 days, even though the merchant also calls it two months. The page's product language is evidence about that offer, not a recurring-charge schedule.

That distinction changes the shopping question. For a one-time order, ask when you must reorder and what the next prescribed strength costs. For a subscription, ask when renewal charges occur and how to stop them. For a prepaid package, ask whether several shipments arrive separately or one package contains the whole supply. Never change a prescribed schedule to make a vial or a budget last longer.

Care membership and medication can run on different clocks

Suppose a hypothetical program charges $50 per calendar month for care and $199 for each 28-day medication supply. The 365-day normalized illustration is $600 in care plus approximately $2,594.11 in supply cost, totaling $3,194.11 before other charges. Multiplying $249 by twelve would miss the different supply interval. Actual billed dates and unused supply could still make the cash total differ.

Our PlushCare review separates membership and visit charges from prescription costs. The JumpstartMD review examines care-only memberships. Neither example should be compared with a medication-inclusive offer by placing the membership price alone in a cheapest-treatment column.

There is another variable the time conversion cannot solve: the dose. A low starting price may apply only to the first order or lowest strength. Record the first bill, the ongoing bill at the prescribed strength, mandatory care and any required labs or shipping. Our six-month cost guide applies that broader approach; a four-week conversion is only one step.

Prepaid equivalents are not a payment schedule

A package advertised at $150 per month might collect $900 immediately for six stated months. That describes a price equivalent, not six $150 charges. It also does not tell you whether the supply lasts 168 days, six calendar months or a dose-dependent period. Ask for the actual quantity and fulfillment schedule before comparing it with either model above.

If you are considering installments for the upfront amount, read our financing guide. The lender's payment interval is a third clock; it does not establish how much treatment the merchant supplies. The cancellation guide covers the separate question of whether unused prepaid care or unfilled medication can be refunded.

The five details a comparable quote needs

Ask the provider for the amount charged today, the next charge date and amount, the medication's days of supply at your prescribed dose, mandatory care or service fees, and the renewal/cancellation rule. Keep those facts together instead of reducing the quote to one monthly-looking number.

For a shortlist, I would rather have a slightly higher quote with a clear supply period and exit terms than an apparently lower number whose unit changes halfway through the comparison. Once both quotes describe the same treatment, time period and included services, the arithmetic becomes useful. Before that, a precise-looking monthly average can hide the very commitment you need to understand.