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11 free calculators, lookups, and templates for SaaS founders — payment recovery ROI, involuntary churn, failed payment revenue, retry windows, and more. No account required.

Tools

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Calculator

Payment Recovery ROI Calculator

Enter your MRR. See how much is failing every month, how much is recoverable, and what the ROI looks like at each plan.

Open calculator

Calculator

Failed Payment Revenue Calculator

Enter MRR and annual churn rate to see exactly how much revenue you lose per year to failed payments specifically.

Calculate annual loss

Benchmark

Churn Rate Benchmark Tool

Select your industry and MRR range to see how your failure rate and recovery rate compare to peers.

See your benchmark

Lookup

Stripe Failure Code Lookup

Enter any Stripe decline code to get the plain-English meaning, whether it is retryable, and the recommended action.

Look up a code

Calculator

Recovery Window Calculator

Select a failure type and invoice amount to get the optimal retry schedule with expected recovery at each step.

Plan your retries

Splitter

Involuntary vs Voluntary Churn

Enter your MRR and churn rate to break down how much churn is from failed payments (fixable) vs actual cancellations.

Split your churn

Calculator

LTV Impact Calculator

See how recovering X% of failed payments affects your customer LTV and LTV/CAC ratio — the CFO view of payment recovery.

Model the impact

Calculator

RevenueCat Churn Calculator

Enter your app MRR and churn rate to split billing failures from real cancellations — and see what Recurflux recovers on top of Apple and Google auto-retries.

Calculate RC churn

Calculator

NRR Calculator

Calculate your Net Revenue Retention and see how much of the gap below 100% comes from failed payments — not product or pricing. Shows NRR before and after recovery improvement.

Calculate your NRR

Estimator

Card Expiry Risk Estimator

How many of your subscriber cards are expiring in the next 30, 60, and 90 days — without you knowing? See the MRR at risk from silent card expiry failures.

Estimate expiry risk

Templates

Dunning Email Templates

8 free email templates — one for each payment failure type. insufficient_funds, expired card, hard decline, authentication required, final warning, and win-back. Copy and use immediately.

Browse templates