Subscription Leak Calculator
Calculate cost of forgotten or unused subscriptions.
Subscription leak is money spent on subscriptions you rarely or never use. Studies suggest 1 in 3 subscriptions go unused. A few $10–20/mo subscriptions add up to $100–200/year in waste. This calculator helps you estimate leak and potential savings from canceling unused subs.
Inputs
Results
Monthly leak: $37.50
Annual leak: $450
Insights
Formula
Leak = Total * (unused% / 100)
Input Definitions
What does each input mean?
- Total monthly subscriptions
- Sum of all recurring subscription costs per month—software, streaming, memberships, etc.
- Est. unused %
- Estimated share of subscriptions you rarely or never use. Studies suggest 1 in 3 (~33%) go unused.
Related Calculators
How Much Revenue Are You Losing to Churn Each Month?
Subscription leak — the combination of voluntary cancellations, failed payments, and silent downgrades — erodes MRR in ways that often aren’t visible until the aggregate impact appears on a dashboard. Even a 2% monthly churn rate means you’re replacing nearly a quarter of your revenue base every year. This calculator helps you measure the leak, understand its composition, and model what plugging it would be worth.
Use this when you want to quantify the revenue impact of your current churn rate, when you’re building a case for investment in retention programs or dunning tools, or when you want to understand how churn improvement compares to equivalent new customer acquisition as a growth lever. In most mature SaaS businesses, retention optimization has a higher ROI than acquisition — but the math has to be run to make that case.