Can You Send an Unpaid Invoice to Collections?

Q: Can you send an unpaid invoice to collections?

Yes. A business can send any past-due invoice to a collection agency whenever it chooses. No law forces a minimum waiting period, but most companies wait 60 to 90 days and send a formal demand first, because recovery odds stay above 70% under 90 days past due and drop sharply after 180 days. It also ends the customer relationship, so it is usually a last step.

Q: How long before an unpaid invoice goes to collections?

There is no legal minimum, but the common threshold for placing an account with a third-party agency is 90 to 120 days past due. Businesses typically start internal reminders at 30 days and send a formal demand letter around 60. The timing matters because an invoice under 90 days past due recovers at roughly 70% or better, while one past 180 days often falls below 15%.

Q: Can you send an invoice to collections without a contract?

Yes. A signed contract helps but is not required. A valid debt can rest on an accepted invoice, a purchase order, an email agreeing to the work, delivery records, or a history of the customer paying you this way before. What agencies and courts want is evidence the work was ordered, delivered, and left unpaid, so the stronger your paper trail, the more collectible the account.

Q: How much does it cost to send an invoice to collections?

Most agencies charge nothing up front and keep a percentage of what they recover, usually 25% to 50% depending on the debt's age and size, with older and smaller debts at the high end. A $6,000 invoice placed at 35% returns you about $3,900 if collected. That is reasonable for an account you had written off and expensive for one an in-house reminder would have collected in full.

Q: Does sending an invoice to collections hurt the customer relationship?

Almost always. Once an outside agency contacts your customer demanding payment, the working relationship is effectively finished, so collections is the right move only when the money matters more than keeping the customer. This is why a disciplined in-house reminder process should come first: it recovers most of what is recoverable while the relationship is still intact and reserves the agency for dead accounts.

Yes, a business can send an unpaid invoice to collections. There is no law that forces you to wait a set number of days, so you can place an account whenever you decide it is past due and unlikely to be paid without pressure. In practice most companies wait 60 to 90 days and send at least one formal demand first, because that window balances giving the customer a fair chance against the sharp drop in recovery odds as an invoice ages.

The real question is rarely "can I," it is "should I yet." Sending an invoice to collections is a one-way door: it usually ends the customer relationship and hands a quarter to a half of the balance to an agency. So the timing, and what you try first, is what actually decides whether you get paid and what it costs you.

How long before an unpaid invoice goes to collections?

There is no legal minimum. Industry practice puts the threshold for a third-party agency at 90 to 120 days past due, with internal escalation starting at 30 days and a formal demand letter around 60. The reason to follow that rhythm is not etiquette, it is math: an invoice under 90 days past due still recovers at roughly 70% or better, while one past 180 days often falls below 15%. Waiting too long costs you far more than moving too fast.

Days past due	What to do	Rough recovery odds
1 to 30	Friendly reminders with a payment link; ask what is blocking approval	Highest
30 to 60	Firmer follow-up, phone contact, restate the terms and any late fee	Strong
60 to 90	Formal written demand naming the consequence of non-payment	Good, above 70% under 90 days
90 to 120	Place with a collection agency or start legal action	Falling
180+	Recovery often drops below 15%	Poor

Can you send an invoice to collections without a contract?

Yes. A signed contract helps, but it is not required to collect or to place an account. A valid debt can rest on an accepted invoice, a purchase order, an email agreeing to the work, delivery records, or a course of dealing where the customer has paid you this way before. What a collection agency and later a court want is evidence the work was ordered, delivered, and left unpaid. The stronger that paper trail, the more collectible the account, contract or not.

What do you need before sending an invoice to collections?

Before you place anything, gather the documentation and confirm the debt is genuinely open. At minimum you want the invoice itself, proof the work or goods were delivered, any agreement or PO, and a dated record of every attempt you made to collect. A clean history of reminders is what turns a placed account from a mystery into a collectible one, because the agency inherits your evidence rather than starting cold.

One check saves real embarrassment and money: make sure the invoice was not already paid to the wrong reference or applied to the wrong account. A meaningful share of "unpaid" invoices were actually settled and never reconciled. On the flip side, staying current on the bills your own business owes protects your credit standing while you press customers on theirs, since the two sides of the ledger tend to be judged together.

How much does it cost to send an invoice to collections?

Most agencies work on contingency and charge nothing up front, then keep a percentage of what they recover, commonly 25% to 50% depending on the age and size of the debt. Older and smaller debts sit at the high end. So a $6,000 invoice placed at a 35% rate returns you $3,900 if collected, and nothing but your time if it is not. That is a fair deal on an account you had written off, and an expensive one on an account a $49 reminder tool would have collected in full.

The full breakdown is in our guide to collection agency fees, including how contingency rates scale with debt age.

Does sending an invoice to collections hurt the customer relationship?

Almost always, yes, and you should treat it as final. Once a stranger contacts your customer demanding payment, the working relationship is effectively over, so collections is the right move only when you have decided the account matters more than the customer. That is exactly why the sequence in front of it matters: a disciplined in-house process recovers most of what is recoverable while the relationship is still intact, and leaves the agency for the accounts that are genuinely dead.

What happens after you send an invoice to collections?

Once you place the account, the agency takes over contact with your customer and works the debt in its own name, calling, writing, and reporting under the third-party rules of the FDCPA and applicable state law. You stop chasing and wait. If the agency collects, it forwards you the balance minus its contingency fee, often 30 to 60 days later. If it cannot, the account usually comes back uncollected, and your remaining options are legal action or writing it off. For most placed accounts you will not need to do anything except respond if the customer disputes the debt or claims it was already paid, which is one more reason to confirm the invoice is genuinely open before you place it.

The smarter order of operations

You can send an invoice to collections today. The businesses that keep the most money rarely need to, because they run a consistent first-party process first and only escalate the accounts that survive it. The failure point is never information; the aging report already shows exactly which invoices are late. It is follow-through, specifically the firm reminders at day 30, 60, and 90 that a busy person keeps meaning to send and never does.

DebtAgent runs that first-party process for you: import your aging report, set the reminder ladder once, and every overdue account gets worked on schedule in your own name for a flat fee from $49 a month, with every contact logged so any account you do eventually place comes with a full history attached. You collect in full on the invoices that respond to a nudge, and only lose a percentage on the ones that truly needed an agency. For larger business-to-business balances, our B2B debt collection page covers the specifics.