Dunning Software: Automated Dunning Management Software for B2B Invoices

Dunning software is a tool that automatically sends the sequence of payment reminders and escalating notices that follows an unpaid invoice or a failed payment, on a schedule you define, without anyone having to remember each account. The word dunning is old commercial English for persistently demanding payment, and it survives mainly in accounting and billing systems.

In practice the term now covers two products that share almost nothing. Subscription billing platforms use dunning to mean retrying a declined credit card and emailing the cardholder to update it. Accounts receivable platforms use dunning to mean chasing a business customer who was invoiced on terms and has not paid. The first is a technical failure to recover. The second is a person deciding when to pay you, which is why the messages, the channels and the endgame are completely different.

Dunning is the automated, in-house reminder sequence you run while the invoice is still yours and the relationship is intact. Collections is what happens after that fails: a formal demand, a third party agency working on contingency, or a legal filing. Dunning is measured in emails sent and days saved; collections is measured in a percentage of what gets recovered.

The boundary matters commercially. Once you hand an account to an agency you are typically paying 10% to 50% of whatever it recovers, scaled by claim size. Published commercial rate cards run as high as 50% on claims under $1,000 and drop to around 10% on claims over $500,000. Every invoice your dunning sequence collects is an invoice that never pays that percentage, which is the entire financial argument for running dunning properly in-house first.

There is also a compliance line. The FDCPA and Regulation F govern debt collection compliance for consumer debts and mainly bind third party collectors. A business dunning its own commercial customers in its own name sits outside most of that, though the TCPA still applies to texts and calls. Our first-party collections page covers where that line falls.

Automated dunning works by watching invoice due dates in your accounting system and firing a predefined sequence of messages when an invoice crosses each threshold you set. A typical B2B sequence sends a courtesy reminder three days before the due date, a first chase at day three past due, a firmer one around day fifteen, a formal notice near day thirty, and an escalation to a decision point at day sixty or ninety.

The software handles three things a person handles badly at volume: it never forgets an account, it never sends the day 45 message with day 3 wording, and it stops the sequence the moment a payment lands so you do not chase somebody who already paid. That last one sounds trivial and is the failure that damages customer relationships most often in manual chasing.

Dunning automation and payment reminder software describe the same mechanism under two names. Vendors selling to subscription businesses tend to say dunning, because the trigger there is a failed card charge; vendors selling to B2B invoicing businesses tend to say payment reminders, because the trigger is a due date that passed. The escalation ladder underneath is identical.

An effective dunning email states the invoice number, the amount, the original due date and one specific action with a deadline, in the first three lines. Everything else is optional. The most common mistake is burying the number in a paragraph of apology, which lets an accounts payable clerk file it without acting.

Tone should track the stage. Early messages assume the invoice was missed, because usually it was. Later messages state consequences you are genuinely willing to apply: a late fee that your contract authorizes, a hold on new orders, or referral for formal recovery. Never threaten a step you will not take, and never state a fee your agreement does not support. Our overdue invoice email page has the wording for each stage, and late fees on invoices covers what you can actually charge.

For B2B invoices, four to six messages across the first 90 days is the range that collects without burning the account. A workable pattern is one before the due date, then day 3, day 15, day 30 and day 60, with a mailed demand at day 75 to 90 if the balance is still open. Beyond that, additional emails add almost nothing.

Volume limits from consumer rules are worth knowing even though they usually do not bind you. Regulation F presumes harassment above seven calls about a particular debt in seven days and restricts contact to 8am until 9pm in the debtor's local time. Those apply to consumer debt, not commercial invoices, but they are a reasonable ceiling to design against anyway.

No. A dunning letter template is a document you fill in and send manually, one account at a time. Dunning software decides which accounts need a letter today, produces it with the right invoice data, sends it on the right channel and records that it went out. The template is the content; the software is the scheduling, the delivery and the audit trail.

Templates are genuinely useful when you have a handful of overdue accounts a month and a person with time. They stop working around the point where you cannot remember which customer got which message when, which for most businesses arrives somewhere between 20 and 40 open overdue invoices.

QuickBooks Online has invoice reminders, not full dunning. You can schedule up to three reminders per invoice, within 90 days either side of the due date, and reminder two must fall on or after the due date. They only fire on invoices that were originally emailed from QuickBooks. QuickBooks Desktop has no scheduler at all.

That covers the polite end of a sequence and nothing beyond it. There is no SMS, no mailed letter, no tone escalation, no contact log you could attach to a demand, and no trigger that surfaces an account for escalation. Businesses usually outgrow it at the point where reminder three has gone out and the invoice is still open. Our QuickBooks accounts receivable automation page covers what to add on top.

It depends entirely on which kind of dunning you need, which is why the comparison table above leads with that column. If your revenue is subscriptions on saved cards, Stripe Billing or Chargebee already include retries and are cheaper than buying a separate tool, with Churn Buster worth it only once recovered revenue clearly exceeds $149 a month. If you invoice businesses on terms, none of those three can help and you want an invoice dunning platform.

Among invoice tools, the split is by pricing model and depth. Paidnice is the cheapest entry at $69 and is strongest at automatic late fees. Chaser is the established option at $259 and up, with a four user cap on the entry tier. DebtAgent runs the full escalation to formal demand on a flat organization-wide fee from $49. HighRadius and Gaviti are built for larger finance teams and neither publishes a price. Our full best debt collection software roundup compares the wider category, and debt collection software pricing prices out every model.