Subscribers
Each month the churn share of last month's subscribers leaves, then the new ones join. Fractions are kept in the sum and rounded on screen.
WISP tower revenue and break-even calculator
Plan a new tower: see the month it pays back what it cost to put up, and the cash it returns over three years. Nothing you type is sent anywhere.
USD
Tower, radios and installation.
USD
Backhaul, power, rent and staff.
USD
Per subscriber.
%
Break-evenMonth 19
Payback period: 1 year 7 months
| Month | Subscribers | Revenue | Profit | Cumulative cash |
|---|---|---|---|---|
| 1 | 23 | $451 | -$449 | -$12,449 |
| 12 | 92 | $1,841 | $941 | -$8,625 |
| 24 | 146 | $2,910 | $2,010 | $10,004 |
| 36 | 183 | $3,652 | $2,752 | $39,217 |
How the projection works
A simple monthly model: subscribers come and go, each pays the average fee, and the tower's running costs come off the top.
Revenue and profit
Revenue is subscribers times the average fee. Profit is revenue less the monthly costs, before tax and loan repayments.
Break-even and payback
Cumulative cash starts at minus the up-front cost. Break-even is the first month it reaches zero, and the payback period is that month in years and months.
Leave headroom
Radios fail, prices move and growth slows as a sector fills. Treat the answer as a plan, not a promise, and try a slower case too.