CalcLibrary

Subscription Break-Even Calculator

Model a subscription business month by month to see when recurring revenue finally pays back setup cost, ongoing fixed cost, variable cost per active customer, churn, and new-customer growth.

Currency
$
$
$
$
customers
customers
%
Examples

$12,000 setup, $49 price, $9 variable cost, $1,800 fixed monthly cost, 60 starting customers, 10 new customers, 0% churn → break-even in month 6 at 120 active customers.

Break-even month
6 months
Customers at break-even
120 active customers
Cumulative revenue at break-even
$27,930.00
Cumulative cost at break-even
$27,930.00
Cumulative profit at break-even
$0.00

Planning model only — taxes, financing, discounts, bad debt, and collection timing are not included unless you build them into your own inputs.

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Examples

How It Works

Formula

Ct=Ct−1(1−r)+NC_t = C_{t-1}(1-r) + N

Πt=Ct(P−V)−F\Pi_t = C_t(P - V) - F

Cumulative Profitt=−S+∑i=1tΠi\text{Cumulative Profit}_t = -S + \sum_{i=1}^{t} \Pi_i

Variables

SS

One-time setup cost

PP

Monthly subscription price per active customer

VV

Monthly variable cost per active customer

FF

Fixed monthly operating cost

CtC_t

Active customers in month t after churn and new customers

NN

Flat number of new customers added each month

rr

Monthly churn rate as a decimal

Πt\Pi_t

Monthly profit in month t

The calculator starts from your active customer base at month 0, applies monthly churn, adds the flat number of new customers for that month, then calculates revenue and cost from the resulting active base. It repeats that monthly loop, keeps the original setup cost as the opening hit, and marks the first month where cumulative profit reaches zero or higher.

  1. Start at month 0 with cumulative profit equal to negative setup cost.
  2. For each modeled month, apply churn to the previous active customers and then add the new customers.
  3. Multiply the resulting active base by monthly price and monthly variable cost.
  4. Subtract fixed monthly operating cost to get that month’s profit.
  5. Add monthly profit to the cumulative total and stop at the first month that reaches zero or above.

Frequently Asked Questions

01How is this different from a unit break-even or ROI calculator?
This model tracks active subscribers month by month. It does not assume one-time unit sales, a single generic payback ratio, or a percentage return target. Instead it applies churn, adds new customers, calculates recurring revenue and recurring cost for that month, and asks when cumulative profit finally gets back to zero or better.
02What customer count does the calculator use at break-even?
It uses the modeled active-customer count from the same month where cumulative profit first reaches zero or above. The count is not a separate static target; it comes from the same churn-and-growth loop that drives the money results.
03What does “no break-even” mean here?
It means the customer path implied by your own price, cost, churn, and acquisition inputs never repays the setup cost. In some cases monthly profit never turns positive; in others it improves briefly but tops out before cumulative profit reaches zero.

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