Dunning Recovery Calculator

What the formula says

Dunning recovery is the share of failed payments successfully recovered: recovered ÷ failed × 100.

Revenue saved = failed payments × recovery rate × the lifetime value of those subscribers, since a recovered payment saves the whole remaining relationship rather than one charge.

Involuntary churn, subscribers lost to payment failure rather than choice. Is typically 20% to 40% of total churn and is almost entirely addressable.

The numbers, worked through

2,000 subscribers with a 6% monthly payment failure rate: 120 failures. A dunning sequence recovering 65% saves 78 subscribers.

Each is worth $543.75 of lifetime value, so the sequence saves $42,400 of lifetime value a month, against a cost of essentially nothing beyond the email automation.

Without any recovery process, those 120 failures would be 6% of monthly churn on top of the voluntary 4%, taking total churn to 10% and cutting lifetime value from $543.75 to $217.50.

That single operational capability is therefore worth more than doubling the lifetime value of the entire subscriber base.

What the number leaves out

Recovery rates vary enormously by failure reason. An expired card recovers well; insufficient funds recovers moderately; a closed account rarely recovers at all.

Aggressive retry schedules can also trigger issuer fraud flags, which makes subsequent attempts fail and can damage the merchant's standing with the card networks.

Turning it into a decision

Implement a proper retry schedule with card updater services rather than simple repeated attempts. Updater services fix expired and reissued cards automatically and address the single largest failure category.

Then measure recovery by failure reason, so the retry logic can be matched to what will actually work for each.

Why involuntary churn is the cheapest churn to fix

A subscriber whose payment failed did not decide to leave. They still want the product, and recovering them requires no persuasion, only a working payment method.

That makes it categorically different from voluntary churn, where the subscriber has evaluated the product and chosen to stop. One is an operational problem with a technical fix; the other is a product or value problem.

Businesses that report a single churn figure conflate the two and usually conclude they have a retention problem when a third of it is a billing problem. Splitting the number is a small reporting change that frequently identifies the largest and most tractable share of the loss.

Pre-emptive notification before a card expires recovers more than any retry sequence after failure, since the subscriber updates the card before the charge is ever declined.

It requires only the expiry date already on file and a scheduled reminder, which makes it among the cheapest retention mechanisms available.

Offering an alternative payment method in the failure message recovers subscribers whose card genuinely cannot be charged, which retries alone will never reach.

Retrying on a schedule matched to typical pay dates, rather than at fixed intervals, materially improves recovery on failures caused by insufficient funds.

Measuring how many recovered subscribers survive the following three months distinguishes genuine recovery from a delayed cancellation, and the durable share is usually high.