A monthly figure may describe a payment, a divided package amount or only part of the charge. Build an annual comparison from the selected price, payment dates, supplied period and separate fees. A twelve-month budget is a planning choice, not a predicted treatment course. Read the withdrawal trials for a different question: treatment after stopping.
Treatment records do not define a purchase term
A 2026 commentary by Sisodia summarizes earlier persistence findings and proposes a pharmacy-claims framework for identifying people who may need support. It is not an original study of prepaid customers.[1]
A retrospective US primary-care records study included 153,044 patients with documented semaglutide or tirzepatide use during 2021–2024. Mean recorded therapy duration was 10.0 months for compounded-only users and 7.8 for brand-name-only users. This observational comparison does not establish why durations differed or measure prepaid purchases, invoices or unused balances.[2]
The anonymous examples below illustrate arithmetic, not current seller offers or an individual treatment forecast. Keep the payment obligation separate from how long treatment might continue.
Thirteen four-week periods span 52 weeks
Four weeks is 28 days. A calendar month averages 30.44, because 365.25 divided by twelve is not 28. Thirteen four-week periods span 52 weeks, or 364 days. A page that writes “$199 every 4 weeks” and prints “/mo” beside it therefore uses a shorter billing period than a calendar month. The Livbetr review separates billing intervals, price labels and four-week shipping claims. The Sommar Club review separates twelve-week charges from advertised four-week supply equivalents.
Thirteen payments total $2,587 for 52 weeks. For a calendar-month comparison, the $199 charge divided by 28 days and multiplied by the average month gives about $216 a calendar month — roughly 8.7% above the number on the page. This is a comparison rate, not the predicted amount of each invoice.
A 52-week illustration does not determine how many payments fall within a chosen calendar year. A charge on day zero followed every 28 days can put another charge on day 364, for fourteen payments within that window. The last payment may cover treatment beyond its end. Check the first charge date, renewal dates and any upfront package before budgeting cash payments. The TotalRx review separates prepaid plan terms from the advertised four-week supply. The Verge review separates prepaid orders, shorter renewal intervals and discretionary cancellations.
Twelve weeks is 2.76 months, not three
Eighty-four days divided by 30.44 is 2.76. A twelve-week package sold at $299 therefore costs $108 a month, not the $99.67 that dividing by three produces. The gap is the same 8.7% as the four-week case, and for the same reason: both periods are shorter than the month they are being divided into.
An average year spans about 4.35 twelve-week periods. At $299 each, the annualized comparison is about $1,300 against the $1,188 that “$99 a month” implies, a $112 difference. That fractional-period comparison is not an invoice count. A package quoted at $597 every twelve weeks has the same shape at a larger size: about $216 per calendar month, or the illustrated $2,596 annualized rate.
Coby Health publishes dose-specific prices alongside twelve- and twenty-four-week bundles. The Coby Health review keeps those purchase terms separate. Check the total charge, supplied period and optional renewal before turning a bundle label into an annual budget.
A membership charged on its own clock
Membership can be charged separately from medicine and on a different schedule. In the examples below, a single annual charge of $199 is allocated across twelve months: $16.58 per month. That allocation does not mean the fee is paid monthly.
For illustration, $59 a month plus a $199 annual membership is about $76 a month and $907 in the first year. An example at $199 of medication plus a mandatory $149 monthly membership is $348 a month and $4,176 a year, of which the membership alone is $1,788.
If the selected quote establishes a care fee but not the separate medication cost, the combined annual amount remains unknown. Do not assume that a missing figure means the seller publishes no price elsewhere. For more on how figures are presented, read the presentation article.
Keep an opening rate separate from later charges
Take an example of $60 for a first month against $160 thereafter, a 62.5% opening discount. The year is $60 plus eleven charges of $160, which totals $1,820, or about $152 a month. The opening figure was $60.
An annual total remains unresolved if the continuing charge is unknown. Do not carry the opening figure through twelve months. In its 2021 announcement of a negative-option enforcement policy, the FTC emphasized upfront costs, charge amounts and frequency, cancellation deadlines and informed consent. These historical materials do not establish today’s requirements for a selected contract.[4]
Account for dose-dependent pricing
If the prescribed dose changes, a dose-indexed price can change too. Ask for the applicable dose prices rather than assuming an opening tier lasts for a year. Worked dose-price examples are in the titration article, and sellers that hold one price across every dose take the variable out of the annual calculation.
Read a prepay term alongside the price
A displayed monthly equivalent can describe a package with a longer purchase term. Confirm the total commitment, amount due now and whether charges recur. A minimum term alone does not establish how much is charged upfront. The Vital Step review separates annual prepayment from its product-specific starting-price labels.
Compare the stated saving with the terms for ending the purchase. Ask what payments remain owed, whether any unused amount is refundable and what happens if treatment changes or stops. Read those conditions alongside the price rather than assuming the discount settles the choice.
Use the HelloWellness review to check the opening charge, renewal interval and total commitment before projecting the selected offer across a year. The Better MedSpa review distinguishes treatment starting prices from longer membership commitments.
Building the annual number yourself
Ask for the payment period, amount due at purchase, repeat charges, separate required fees and prices at the prescribed dose. Confirm the minimum commitment and renewal authorization separately. If a required amount or later rate is not established, leave that part of the estimate unknown rather than filling it with an assumed price. The Totara Health review distinguishes longer-plan labels from a confirmed payment schedule.
Choose the comparison dates, then list each actual payment due within that window. Include the opening charge once, each renewal and every separate fee; do not add an opening payment on top of a standing payment for the same period. Show any treatment supplied beyond the end date. Keep this cash budget separate from an annualized comparison rate when comparing another seller’s total or a covered copay in the coverage article, while preserving the different assumptions.
The published comparison rates are on the price board, and the terms behind each figure are recorded in the seller write-ups. If the selected offer leaves a required amount unresolved, keep that total unknown rather than treating a partial figure as complete. That distinction is covered by the methodology.
A year-long comparison should keep the purchase term visible. The Maximus review lays out its different plan lengths, while the Belle Health review distinguishes short and longer subscriptions. Compare the term you actually intend to purchase rather than assigning a long-plan quote to a one-month trial.