Two different things
Collections software is something you run. It reads your open invoices, sends reminders on a schedule, handles replies, gives customers a way to pay, and records payments. The emails come from you. The customer is still your customer.
A collection agency is someone you hire. You hand them a debt you’ve failed to collect, they pursue it under their own name, and they keep a share of what they recover. By the time an agency is involved, the customer usually knows the relationship has changed.
Most overdue invoices between businesses don’t need an agency. They need someone to follow up on time, find out what’s holding the payment, and keep at it. That’s what software is for.
Side by side
| Collections software | Collection agency | |
|---|---|---|
| Who contacts the customer | You, through the software | The agency, in its name |
| When it’s used | From the due date (or before) onwards | After your own efforts have failed, often 60 to 90+ days |
| Relationship | Intact, usually | Usually strained or over |
| Cost | A subscription | A share of what’s recovered |
| Control | You set the tone and timing | The agency does |
| Best for | Most late invoices | Customers who have gone silent or refuse to pay |
On cost: agencies typically work on contingency. As one published example, Chaser’s pricing page lists success fees of 6% to 30% for the agency partner it works with, as of November 2026. On a $4,000 invoice that’s up to $1,200 you’ll never see.
When software is enough
Software is the right tool when the customer is still talking to you, or would be if the right person saw the email. Signs you’re in that territory:
- The invoice is less than about 60 days late.
- The customer has paid you before.
- Replies, when they come, are about process: POs, approvals, payment runs.
- The real problem is that follow-up happens irregularly, because someone’s busy.
That last sign is common. In Intuit’s Late Payments Report 2026, 59% of owners surveyed had invoices more than 30 days overdue. Not all of those are bad debts; some are simply invoices nobody has followed up on.
What to look for in the software: reminders that read like you wrote them, replies sorted so promises and disputes get handled, a pay link in every message, and payments recorded back in your books so reminders stop on their own. Approval mode, where nothing goes out until you OK it, is worth having while you build trust.
When an agency is the right call
An agency starts to make sense when all of these are true:
- You’ve done the full sequence. Reminders, accounts payable copied, a phone call, and a formal final notice with a deadline.
- The customer has gone silent or refused without a reason you can fix.
- You’ve decided the relationship isn’t worth protecting, or it’s already over.
- The amount is worth the fee. After a contingency fee, will you recover enough to matter?
For some balances, small claims court is an alternative to an agency, without a share going to anyone. Limits, fees and rules vary by state, so look up your local court first. For larger amounts, a letter from a lawyer is sometimes enough on its own.
Before you hand anything over
Agencies and courts will both ask what you’ve already done, so keep a record from day one:
- The signed agreement, quote or PO that shows what was ordered.
- The invoice, and proof it was delivered to the right person.
- Every reminder you sent, with dates.
- Every reply, including promises made and missed.
- Your final notice, with its deadline.
Collections software makes this easy as a side effect, because every reminder and reply is logged against the invoice. If you’re chasing by hand, a simple spreadsheet with one row per contact attempt does the job.
This is general information for business-to-business invoices, not legal advice. Rules on collecting debts, especially consumer debts, vary by state and are stricter. Check with a lawyer before taking legal steps.