The job is finished, the invoice went out weeks ago, and the customer has gone quiet. Meanwhile your own payroll, suppliers and rent do not care that the money is sitting in someone else's accounts payable. This is one of the most common cash crunches in business, and there is a right order for working it.
Two tracks run at once: collect the money, and bridge the gap while you do. This guide covers both, then the part most owners skip, which is making sure the next big invoice cannot do this to you.
The collection ladder, rung by rung
Escalate in steps, and give each step a deadline measured in days, not weeks. Most unpaid invoices die somewhere on this ladder long before a courtroom.
- Resend the invoice with a statement. Assume administrative failure before malice: a surprising share of overdue invoices are sitting in an approval queue, missing a PO number, or addressed to someone who left. Resend, itemized, to the right person, and ask one direct question: is there anything preventing payment?
- Call accounts payable, not your contact. Your project contact does not cut checks. The AP clerk can tell you in two minutes whether the invoice is approved, scheduled, or stuck, and which of those it is changes your next move entirely.
- Make the owner-to-owner call. Polite, direct, specific: the work is done, the invoice is 45 days past terms, and you need a payment date today. Say the number, ask for the date, then stop talking. Most owners pay the vendors who visibly track the debt.
- Offer structure before pressure. A dated payment plan, or a small discount for full payment this week, converts an avoider into a payer and costs less than months of chasing. Get any plan in writing with amounts and dates.
- Apply real leverage. Pause future work and deliveries until the account is current. In construction and the trades, preserve your lien rights and say plainly that you intend to: a lien deadline moves money faster than any reminder email ever written.
- Send a formal demand letter. On letterhead, or better, from an attorney: the amount, the history, a firm deadline, and the next step named. For a few hundred dollars, an attorney letter collects a remarkable number of invoices that eleven friendly emails did not.
- Escalate to the forum that fits the size. Small claims court handles smaller amounts cheaply and without a lawyer; collections agencies and litigation handle the rest at real cost. At this rung, get actual legal advice, weigh cost against the debt, and accept that the customer relationship is already spent.
Bridge the gap while you collect
Collection takes time even when it works, so run the second track in parallel: keeping your own obligations paid while the money is stuck. Start by mapping how long you can hold out, week by week, with our cash flow gap calculator. The length of that runway decides how much bridging, if any, you actually need, and stops a stressful invoice from panicking you into overborrowing against it.
An unpaid invoice is not just a problem; it is also an asset. The financing options below all exist because a receivable from a solvent customer has real value before it pays.
Factoring and invoice financing
Invoice factoring sells a receivable at a discount for cash now, with the factor collecting from your customer. Invoice financing borrows against the receivable instead, leaving collection with you. Both turn paper into money in days once a facility exists, and both care intensely about one thing: your customer's ability to pay. Recourse terms decide who eats the loss if the customer never pays, so read that clause twice.
Now the honest catch for this exact situation: a badly overdue invoice from a customer who is dodging calls is hard to factor, because the factor can see exactly what you can see. Factors want fresh invoices owed by customers who pay slowly but reliably. The practical play is usually not factoring the problem invoice; it is factoring your other receivables to unlock cash while you work the problem customer up the ladder yourself. For how factoring stacks up against an advance for this, see invoice factoring vs MCA.
Other ways to bridge
A line of credit you already hold is the cheapest bridge there is; this situation is the exact use case revolving credit was invented for. Without one, a working capital advance can land in a day or two, underwritten from your deposits rather than your customer's behavior. Price it against the wait honestly. Suppose $8,000 of financing cost bridges a $40,000 invoice you are confident collects in 60 days: expensive but survivable once. The same bridge built every quarter for the same customer is not a bridge, it is a subsidy.
Which is the real test for all of this: bridging should buy time for collection to work, not replace it. If funding the gap lets you avoid the uncomfortable phone call, the funding is enabling the problem.
Protect the next invoice
Once the fire is out, change what let it start. Deposits and progress billing turn one giant receivable into several small ones, so no single customer can hold your payroll hostage; contractors waiting on draws have a whole product category built for that gap, covered in contractor draw payment funding. Put payment terms, late fees and stop-work rights in writing before the next job starts, because terms negotiated after delivery are worth what they cost to print.
And check big customers before extending big credit. A customer asking for net-60 on your largest order to date is asking you for a loan; it is fair to treat it like one, look into how they have paid others, and size your exposure to what you could survive losing.
What to avoid
Do not become your customer's bank at advance pricing. Repeatedly financing one slow payer's dysfunction with expensive money means you carry the cost while they keep the habit; either the terms change or the customer does. Do not stack a second advance on an existing one to survive the same unpaid invoice, and do not threaten anything, publicly or privately, that your contract does not support; leverage that breaches the contract hands the debtor a counterclaim.
Stress also attracts the usual predators. Fees demanded before funding, strangers calling with your application already in hand, agreements with a confession of judgment inside: the field guide is predatory funder warning signs, and it is worth ten minutes before you sign any bridge.
What we would ask you on a first call
How big is the invoice against your monthly revenue, and how long overdue? What is the customer actually saying, and what does their payment history look like? What other receivables do you carry, and how many weeks can the business run before the gap bites? What is already borrowed against the account?
The answers sort this quickly. Some situations need no funding at all, just rungs of the ladder nobody has climbed yet, and we will say exactly that. Some fit factoring cleanly, especially where there is a book of receivables beyond the problem invoice. Some are one-time bridges worth pricing and taking. The goal of the call is to tell you which one yours is, with real numbers, before you sign anything at all.
Frequently asked questions
Can I factor an invoice that is already past due?
It gets harder the older the invoice is: factors buy the likelihood of payment, and a badly overdue invoice from an unresponsive customer is visibly weak. Some factors buy aged receivables at steep discounts, but the more common and better move is factoring your current invoices to raise cash while you collect the problem one directly. Fresh invoices from reliable-but-slow payers are what factoring is genuinely good at.
Should I offer a discount to get paid faster?
A small discount for immediate payment is often the cheapest financing available: giving up two or three points of one invoice can cost far less than months of chasing or bridging the gap with borrowed money. Cap it, put a hard expiration date on it, and offer it once. A customer who learns that stalling earns a discount will stall every invoice you ever send them.
When is it worth involving a lawyer or collections agency?
When the ladder is exhausted and the amount justifies the cost: attorney demand letters are cheap and surprisingly effective, small claims court fits smaller debts without counsel, and full litigation or collections only makes sense when the recovery clears the fees. The relationship is usually over at this rung, so weigh that honestly. For specifics on your situation and your state, get real legal advice rather than a blog's.
Does invoice-based funding depend on my credit?
Less than most products: factors underwrite your customer's ability to pay more than yours, which is exactly why factoring reaches businesses that unsecured lending declines. Your own file still matters at the margins, and a working capital advance used as a bridge leans mostly on your deposit history. Expect every option to get cheaper as the receivables and the customers behind them get stronger.