Annual-to-monthly normaliser

Updated 2026-08-04

Every MRR calculation depends on one operation: turning a price charged on some arbitrary interval into a monthly equivalent. Get this wrong and every number downstream is wrong.

The conversions

Weekly and daily use 365 ÷ 12 = 30.4167 days per month rather than a flat 30, which is why the factors have awkward decimals. Over a year the difference is real: rounding a weekly plan to ×4 costs you about 8% of the figure.

Why this matters more than it looks

Two businesses with identical annual revenue can report wildly different MRR if one normalises and one doesn't. The one that counts a $490 annual payment as $490 of MRR in January will show a 92% "churn" in February — not because anything happened, but because the arithmetic was wrong.

Normalising is also what makes plans comparable. A $490/year customer and a $45/month customer are worth almost the same per month, and any decision you make about which to pursue should start from that fact.

Doing it across a whole account

Fine for one plan. Tedious across 300 subscriptions on four different intervals across three platforms — which is precisely what FRGMNT automates, live, on your phone.