What is Dunning?

What is Dunning?

Dunning is the process of communicating with customers whose payments have failed or are overdue, with the goal of recovering the revenue before it's lost to churn. In subscription businesses, it's one of the highest-leverage activities in the entire revenue stack because the customer hasn't chosen to leave, their card just didn't work.

Dun comes from the 1620's phrase meaning "to insist on payment of debt," 1620s, also as a noun, "agent employed to collect debts". The modern version is considerably more sophisticated than its origins suggest: automated retry logic, personalised messaging sequences, and payment method update flows that recover revenue that would otherwise quietly disappear at the end of a billing cycle.

Why Failed Payments Happen

Understanding the failure mode shapes the recovery strategy. Not all payment failures are the same, and treating them identically leads to over-contacting customers with solvable problems and under-pursuing ones who've genuinely churned.

Billing infrastructure that can distinguish hard from soft declines, and route them into different recovery flows, recovers materially more revenue than systems that retry everything on the same schedule.

The Dunning Sequence

Most dunning processes follow a staged structure. The first stage is automated retries attempting the charge again, often at different times of day or on different days of the month, to catch temporary issues like insufficient funds that resolve themselves. Well-designed retry logic considers the specific decline code returned by the gateway rather than retrying blindly.

The second stage is customer communication. An email or in-app notification lets the customer know a payment failed and asks them to update their details. The tone here matters: customers with a genuine payment method issue are not trying to churn, and aggressive messaging at this stage damages a relationship that can be saved with a simple prompt.

The third stage is escalation. If retries and communication haven't resolved the failure after a defined period, the account is flagged for service interruption or cancellation. The timing of this threshold is a business decision. If it's too short, you're cancelling customers who would have paid; too long and you're delivering service to customers who won't.

Dunning and Revenue Recovery

The revenue impact of involuntary churn

In subscription businesses, a meaningful share of churn is involuntary - where customers whose subscriptions lapse because a payment failed, not because they decided to leave. Estimates vary, but involuntary churn commonly accounts for 20-40% of total subscription churn. A well-run dunning process recovers a significant portion of this.

Smart retry timing

The day of the month matters. Retrying a payment on the day after it failed often produces the same result. Retrying mid-month, when customers are more likely to have funds available, recovers more. Some billing systems use machine learning to predict the optimal retry time per customer based on historical payment behaviour. Others use simpler heuristics. Both outperform fixed-interval retries.

Account updater services

Card networks offer account updater services that automatically refresh stored card credentials when a customer gets a new card number. This prevents a category of failures entirely the customer never knows their card expired, because their payment credential was updated in the background. Payment gateways that support account updater pass the updated credentials to the billing system before the next charge attempt.

Dunning Metrics to Track