Monthly vs Annual Subscription Calculator
Written by Thierno Sadou Diallo, formula verified per our methodology • Last checked on 9/9/2026
The savings from choosing the annual plan are calculated with (monthly price × 12) − annual price. For an offer at €9.99/month versus €99.99/year, the annual plan saves €19.89, about 16.6%.
Explanation
Many subscription services (streaming, software, gyms) offer a discounted rate for an annual commitment paid upfront, compared with the same service paid month by month. To compare the two offers objectively, the monthly rate needs to be put on an annual basis (by multiplying it by 12), then compared with the displayed annual price: the difference gives the real savings from committing for the year, both in value and as a percentage of the monthly-equivalent cost. This comparison shouldn't be the only decision criterion, though: the annual offer generally ties up the full amount upfront (a bigger cash-flow commitment than a spread-out monthly payment), and often locks you in for the full term without a simple way to cancel partway through if your needs change, unlike a monthly subscription that can be canceled anytime. The percentage saved gives a useful benchmark for judging whether this extra commitment pays off: a saving of just a few percent is worth weighing against the loss of flexibility, while a saving of 20% or more makes the annual offer clearly more attractive for a service you're confident you'll keep using long-term.
Example: €9.99/month versus €99.99/year
Inputs
Monthly price: €9.99. Annual price: €99.99.
Calculation
Cost over one year at the monthly rate = 9.99 × 12 = €119.88. Savings = 119.88 − 99.99 = €19.89. Percentage saved = 19.89 ÷ 119.88 × 100 ≈ 16.59%.
Result
The annual plan saves €19.89, about 16.6% compared with the monthly rate.
Frequently asked questions
Is a negative percentage saved possible?
Yes, it means the displayed annual offer actually costs more than 12 months paid at the monthly rate — a rare situation, but one that can happen (a display error, or an annual offer that bundles extra services billed separately in the monthly plan). This calculator shows that negative result as-is, as a signal worth double-checking, rather than hiding it.
Should the annual plan always be chosen if it's cheaper?
Not necessarily: price is just one factor among others. The annual plan generally ties up a larger amount upfront and often commits you for the full term, without as simple a way to cancel partway through as a monthly subscription. For a service whose long-term use is uncertain, the flexibility of the monthly plan can be worth the price difference.
Does this calculation also work for comparing a weekly plan to a monthly plan?
The principle stays the same (put both offers on a common time basis before comparing), but this calculator is specifically designed to compare monthly and annual plans (a factor of 12). For other billing periods, the multiplying factor would need to be adjusted accordingly.