What happens if a customer doesn't pay an invoice?
What happens when a customer doesn't pay an invoice — and what you can do about it
Short answer
If a customer doesn't pay, you have roughly four paths: continued follow-up, a formal demand letter, small claims court, or a third-party collection agency. The path that makes sense depends on the balance size, your relationship with the client, and how much time has passed. Most unpaid invoices below $500 are resolved with a follow-up call; balances over $2,000 and older than 90 days often need escalation.
The first 30 days are entirely yours to manage. Send two or three reminders — email, then phone — and assume administrative delay before assuming bad intent. The majority of overdue invoices at this stage are resolved with a second contact. The client missed it, the approval was stuck in finance, or the check was sent to a wrong address.
Days 30–60: if reminders haven't worked, step up the formality. A demand letter on business letterhead (or a formal email that references your payment terms, the exact balance, and a firm deadline) signals that you're moving toward legal action. You don't have to involve a lawyer yet, but the tone should make clear you're tracking the obligation closely.
Days 60–90: this is the decision window. Your main options are (a) negotiate a payment plan directly, (b) engage a collection agency — typically 25–50% contingency fee — or (c) file in small claims court if the amount qualifies (limits vary by state, usually $5,000–$10,000). Small claims is faster and cheaper than you probably think: no lawyer required, filing fees under $100 in most states, and judgment in 30–60 days.
After 90 days, recovery rates drop significantly. Published industry data shows a correlation between invoice age and collectability — 30-day invoices recover around 90% of the time; 6-month invoices may recover less than 50%. This is why consistent follow-up in the first 30–60 days matters more than any downstream option.
If you exhaust all options, you can write off the invoice as a bad debt expense for tax purposes. In cash-basis accounting, you simply never claimed the income; in accrual accounting, you recognized revenue when invoiced and can now deduct the loss. Keep documentation — the invoice, your follow-up attempts, and any correspondence — in case of an audit. Syntharra's AI calling system is specifically designed to close invoices in the 0–60 day window before write-off becomes a real consideration.