When invoices remain unpaid, many companies turn to debt collection agencies. On the surface, they promise to recover overdue payments without burdening your accounts receivable (AR) team. But what do debt collection agencies actually cost — and is outsourcing really the best solution?
The typical cost of debt collection agencies
Debt collection agencies usually charge in one of two ways:
Contingency Fee
The most common model.
The agency takes a percentage of the recovered amount.
Fees range from 10% to 50%, depending on invoice size, age of debt, and difficulty of collection.
On average, most B2B companies pay 15–20% of what is collected.
Example: If a customer owes €100,000 and the agency charges 20%, you only receive €80,000 back.
Flat Fees or Subscription Models
Some agencies charge per account or per letter.
Typically used for early-stage collections.
Less common in B2B, more in consumer collections.
While outsourcing can help recover payments, the cost quickly adds up — and you are effectively paying for manual labour.
The hidden costs of debt collection agencies
Beyond the headline fees, there are other costs CFOs should consider:
Lost customer relationships: Harsh or impersonal collection tactics can damage long-term business ties.
Limited visibility: Once the debt is outsourced, you lose control over communication with your customer.
Scaling issues: Agencies can only add more human collectors, which means costs scale linearly with volume.
In the end, agencies are not automating collections — they are just outsourcing the manual work.
Alternatives to debt collection agencies
For companies frustrated by high fees and manual outsourcing, modern AR automation and AI agents provide a better path. Instead of handing over 20% of overdue invoices, businesses can automate collections in-house, keeping both control and cash.
AI agents can:
Automate dunning workflows with contextual, personalised outreach.
Engage in two-way conversations — answering queries, sending invoice copies, logging disputes.
Track promise-to-pay dates and resume follow-ups automatically after expiry.
Escalate professionally when payments remain overdue, mirroring human collectors.
Leverage multiple channels, including AI-driven voice calls and voicemails. While B2B companies may hesitate to let AI call customers directly today, leaving voicemails is already effective — and over time AI voices will be indistinguishable from humans.
The result: faster collections, lower DSO, and reduced reliance on costly agencies.
Why early resolution matters in collections
One of the biggest advantages of AI over debt collection agencies is its ability to prevent invoices from aging in the first place. The likelihood of recovery drops sharply the longer an invoice remains overdue:
At 30 days past due, most invoices are still collectible.
At 90 days, recovery chances fall significantly.
After 6 months, many invoices are written off as bad debt.
Often, overdue invoices are not caused by unwillingness to pay but by outstanding issues such as:
Wrong or missing purchase order numbers.
Incorrect billing addresses.
High volumes of inbound queries overwhelming AR teams.
Disputed line items that never get resolved.
AI agents and AR automation software can resolve these issues early. They can instantly respond to customer queries, resend corrected invoices, and flag disputes before they escalate. By intervening quickly, AI keeps invoices from becoming severely overdue — and keeps cash flowing.
Outsourcing vs automation: What’s better for CFOs?
Outsourcing to agencies reduces the workload but comes at a steep cost and leaves you dependent on external collectors. AI agents, on the other hand, eliminate the manual work entirely. They are scalable, always-on, and designed to protect customer relationships while collecting faster.
Instead of paying agencies 15–20% of recovered amounts, CFOs can use AI to collect more, at lower cost, with greater control.
Conclusion
Debt collection agencies cost anywhere from 10% to 50% of recovered amounts, with most B2B companies paying around 15–20%. But the bigger cost comes from letting invoices age, then outsourcing the work to humans who do the same manual chasing at a premium.
AI agents provide a smarter alternative. They automate dunning workflows, handle two-way conversations, track promises to pay, resolve issues early, and even leverage voice channels. The result is lower DSO, stronger cash flow, and far less reliance on expensive agencies.