How annual billing works
The same plan is offered with two prices: monthly and yearly. A customer who picks the yearly price pays for twelve months at once and is not charged again until the anniversary. The yearly price is usually lower than twelve monthly payments, often described as months free: 2 months free means the year costs 10 times the monthly price.
Changes during the year are prorated across the year. An upgrade in month five charges the difference for the days left in the year; a downgrade is often scheduled for the renewal, so the customer keeps what they paid for.
Cancellation needs a clear rule. The common one is that an annual plan runs to the end of the year it was paid for and then stops, without a refund for the unused months. Some businesses refund the unused part, or refund in full within a short window after purchase.
annual discount = 1 − annual price ÷ (12 × monthly price)
mid-year upgrade = (days left in the year ÷ days in the year) × (new annual price − old annual price)
Worked example
A booking app charges $50 a month, or $500 a year, which it advertises as 2 months free.
- Paying monthly for a year: 12 × $50
- $600.00
- Paying annually
- $500.00
- Saved by paying annually: 2 months × $50
- $100.00
The saving is $100 ÷ $600, about 16.7% off, and the business has the $500 on the first day of the year.
Why annual billing matters
Annual billing brings a year of cash in on day one, which pays for growth without borrowing. It also means twelve fewer renewals where a card can fail or a customer can reconsider, so customers who pay annually have fewer chances to churn during the year.
The cash is not all revenue straight away. For accounting, a $500 annual payment is earned over the twelve months it covers, and the unearned part is deferred revenue until then.
Common mistakes
- Counting the annual payment as one month's MRR A $500 annual plan adds about $41.67 of MRR each month, not $500 in the month it was paid.
- No rule for mid-year changes An upgrade halfway through the year moves real money. Prorate by the day across the year and show the amount before the customer confirms.
- Silent renewals Charging a full year again without warning leads to refund requests and disputes. Send a reminder before the renewal, and check the rules where you sell.
- Refund terms nobody can find Say what happens if an annual customer cancels, on the checkout page and the receipt, before anyone asks.