How to Reduce Bad Debt Risk in B2B

You landed a new client. Did good work. Sent the invoice. And then: silence. The payment deadline passes. You send a reminder. No response. After two months you start to suspect you'll never see that money.

On average, a small but significant share of all invoices at SMBs are never paid. That sounds small, but on $500,000 in annual revenue, it adds up fast. Nearly a quarter of SMB owners lose more than EUR 20,000 annually to uncollectable invoices.

The question isn't whether you'll deal with bad debt. It's whether you see it coming.

What is bad debt risk?

Bad debt risk is the chance that a customer won't pay an outstanding invoice. That can happen because of financial problems, a deliberate decision not to pay, or a dispute about the product or service delivered.

For SMBs, bad debt risk is one of the biggest threats to cash flow. The vast majority of SMBs deal with late payments. 40% say overdue invoices put pressure on their liquidity. And one in four bankruptcies in the EU is caused by late customer payments.

The risk isn't just in invoices that never get paid. It's also in invoices that are 60, 90, or 120 days late. The longer an invoice sits unpaid, the lower your chances of collecting the full amount. At 90 days, the collection probability drops to 70%. At 12 months, it falls to 23%.

How to spot doubtful debts early

A doubtful debt is an outstanding invoice you expect won't be paid in full. The difference from a regular late payer: a doubtful debtor shows structural warning signs that something is wrong.

The key signals:

Changing payment behavior. A client who always paid on time and suddenly pays consistently late. That's not an oversight anymore. That's a pattern.

Going dark. The customer stops responding to emails, doesn't answer calls, and avoids conversations about the outstanding invoice. Avoidance is one of the strongest signals.

Sudden increase in orders. An unexpected spike in purchasing can mean other suppliers have cut off credit. That customer is buying from you on credit what they can no longer get elsewhere.

Disputes that didn't exist before. If a customer who never complained suddenly starts disputing invoices, it can be a delay tactic. Nearly a third of late payments by foreign B2B customers in the Netherlands result from disputes about quality.

Partial payments without explanation. The customer pays less than the invoiced amount with no explanation. That's not goodwill. That's a liquidity problem.

Not every late payer is a doubtful debtor. The difference is in the pattern. A customer who forgets once is disorganized. A customer who consistently pays late, becomes unreachable, and raises disputes is a risk.

Preventing bad debt

The most effective way to prevent uncollectable invoices isn't chasing harder. It's being more selective about who you extend credit to.

Check creditworthiness

Only about a third of SMB owners check the creditworthiness of new customers. About one in five take no protective measures at all against payment defaults. That's an expensive choice.

Credit reporting services like Dun & Bradstreet, Experian, and industry-specific tools offer credit scores and recommended credit limits. For smaller transactions, even basic checks (how long has the company existed, are their financials public, do they have other creditors) can flag problems before they become your problem.

Set clear payment terms

Define payment terms in your contracts and general terms. State the payment deadline, any applicable interest on late payments, and that collection costs will be charged. This isn't unfriendly. It's professional, and it gives you a legal basis to recover costs.

Follow up early

Businesses spend weeks of working time per year chasing late payments. That's more than a quarter of the working year. Early warning systems within automated debtor management prevent a significant portion of outstanding invoices from progressing to bad debt status.

The data is clear: the earlier you follow up, the smaller the risk. Wait until day 90, and nearly a third of your receivables are already lost.

Keeping outstanding invoices in check

Your total outstanding invoices at any point in time represents your exposure to bad debt. The higher that number, the greater your risk. Reducing it is a matter of speed and consistency.

Shorten the collection timeline

The faster an outstanding invoice moves through your collection process, the lower the chance of non-payment. The standard process: reminder after 3 days, formal demand after 14 days, default notice after 30 days, handoff to a collection agency or court after 60 to 90 days.

But most small businesses don't follow this timeline. They send an email, wait, send another email, wait again, and by the time they take action, the invoice is 120 days old and the collection probability has halved.

Use multiple channels

Phone contact has a much higher response rate compared to email. Combining calls with SMS increases contact rates significantly. Yet most businesses stick to email simply because calling takes too much time.

Don't ignore small invoices

More than half of business owners let late payments slide up to 10 times a year because it doesn't seem "worth the effort" to chase them. Those small invoices add up. They're also exactly the ones that age into write-offs because nobody prioritizes them.

Automating your accounts receivable

Automated accounts receivable reduces bad debt write-offs by a meaningful amount. Collection success rates rise meaningfully higher with automation compared to manual processes.

At Dunwise, we built debtor management software that goes beyond email reminders. Our AI voice agent calls every outstanding invoice on schedule. The tone adjusts automatically: friendly at 7 days, professional at 30, direct at 60.

The difference from a standard reminder email: the agent has a conversation. Is there a dispute? The agent captures the details and routes them to your team, so the issue gets resolved instead of silently blocking payment for months. Customer says they never received the invoice? It gets sent via SMS during the call. Customer agrees to pay? The payment link arrives immediately.

Follow up early, follow up consistently, through the right channel. That's how you prevent doubtful debts instead of writing them off after the fact.

Want to see what that means for your bad debt risk? Book a demo. The invoices you write off are almost always the ones nobody followed up on in time.