Annual vs. monthly savings calculator for your SaaS pricing page
"Save 20% with annual billing" is a claim. A calculator that takes the visitor's own plan and seat count and shows the exact euro amount they'd keep by switching to annual is proof — and it nudges the choice that gives you cash up front instead of a monthly trickle.
1. Three inputs, one that most visitors already know
Monthly price per seat, number of seats, and the annual discount percentage your plan
already offers (commonly 15–20%). The formula is
monthly_total = price * seats * 12 and
annual_total = monthly_total * (1 - discount), with the result showing
monthly_total - annual_total as the amount saved.
2. Show the saving as money, not a percentage
"Save 20%" is abstract; "Save €480 a year" is a number a buyer remembers. Lead the result with the euro amount, and add the percentage as a smaller second line for the visitors who want to double-check the maths.
3. Put it next to the pricing table, not on a separate page
The calculator earns its place beside the plan picker, where the visitor is already comparing monthly and annual prices. A result that updates live as they change seat count removes the need for them to do the multiplication themselves before they commit.
4. Build it without a developer
Start from the ROI calculator template, relabel the inputs to price per seat, seats and discount, and publish. Drop the embed snippet next to your pricing table, and every visitor who plays with the numbers is a lead you can follow up with about annual billing.