Why model your tiers
Pricing is one of the cheapest levers you have, and one of the least tested. Moving a price takes no new code. Yet many founders set plans once and never look again.
This tool models two or three tiers. For each you enter price, customer count and cost to serve. It then shows the MRR and margin each tier brings in, and how the total shifts when customers move between tiers.
Annual versus monthly
Annual plans bring cash early and lower churn, usually at a discount. Monthly plans convert easier. The mix matters. The optimizer lets you set the share on each and see the blended result.
A 15 percent annual discount sounds large. But if it moves a fifth of customers to annual and cuts their churn, it can pay for itself fast.
Reading the charts
The stacked revenue chart shows how much each tier contributes. If one tier carries most of the revenue, that's your real product. The others may exist mainly to make it look reasonable.
The mix sensitivity view shows what happens if customers drift up or down. A small shift toward the top tier can beat a big gain in total customers.
Testing price changes
Many founders underprice. Raising prices for new customers is cheap to test. If conversions barely move, you were leaving money on the table. If they drop hard, you've learned something, and you can undo it.
Leave existing customers alone at first. Grandfathering avoids churn spikes.
Inputs to be honest about
Use real customer counts and real cost to serve. Include support, hosting and payment fees. Guessing here makes margin look better than it is.
The output is a model, not a prediction. Real buyers react in ways a spreadsheet can't. Your figures stay in your browser.