Business & Growth · Getting Paid
How to Collect Outstanding Invoices Without Losing the Client
Collect an outstanding invoice in order: a reminder, a formal statement, a late fee if your contract allows it, a demand letter, then a lien or small claims. Stop the moment they pay.
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What does “outstanding” mean on a contractor invoice?
An outstanding invoice is any invoice you sent that has not been paid, due date or not. Overdue is the smaller group inside it: the due date has passed. A Net 15 invoice sent yesterday is outstanding but not overdue; the same invoice on day 20 is both.
What is the collection sequence for outstanding invoices?
Escalate in order and stop as soon as the client pays. Skipping straight to a demand letter on a client who forgot costs you the referral.
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Send a reminder before the due date slips
A short note a few days ahead of the due date, restating the amount and date, clears most outstanding invoices with zero friction.
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Send a formal statement, then apply the late fee if your contract allows it
Once overdue, send a statement showing the amount, due date, and days outstanding. Apply a late fee only if your contract stated the rate in advance.
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Send a written demand letter with a deadline
State the amount owed, invoice number and date, and a firm deadline, delivered a way you can prove was received.
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File a lien or head to small claims
A mechanics lien secures payment from the property itself; small claims is faster and lawyer-optional for a smaller balance. Which one fits depends on your state’s deadline.
Turn a photo into an itemized estimate, free →
When does a late fee actually hold up?
A late fee is a contract term, not something you add after the fact. If your written agreement states a rate, such as one and a half percent monthly, apply it once the due date passes. If it does not, a fee added later is a request, not an enforceable charge.
In California, unless the owner and direct contractor agreed otherwise in writing, the owner has 30 days after a written demand made under the contract to pay an undisputed progress payment. Miss it, and the owner owes the contractor 2 percent a month on the amount wrongfully withheld, in place of other interest (Civil Code 8800). The penalty comes from the statute, not a term you write in.
When do you escalate to a lien or small claims?
Lien rules are state specific and the clock is short: check your deadline the day an invoice looks likely to go unpaid, not the day you decide to file.
| State | Contractor deadline | Statute | Captured |
|---|---|---|---|
| California | 90 days after completion, or 60 after a notice of completion, whichever is earlier. | Civil Code §8412 | Sept 25, 2026 |
| Florida | 90 days after final furnishing of labor or materials. | Florida Statutes §713.08(5) | Sept 25, 2026 |
Both run from a project event, not your invoice date. Miss one and the lien right is gone.
Before you file, ask a paid supplier for a lien waiver. An owner who sees clean waivers up the chain has one less reason to hold the payment. You will sign your own once this invoice clears.
How do you keep the list of outstanding invoices short?
Take a deposit before you order material, sized to cover material cost, and put it in the signed estimate. On a job past a few weeks, bill progress draws tied to a milestone the client can see, such as rough-in or drywall. A shorter gap between work done and cash in means a smaller outstanding invoice.
SimplyWise Cost Estimator for outstanding invoices
SimplyWise Cost Estimator turns a job-site photo into an itemized estimate in about 6 seconds. Material, labor, and fee lines stay editable. Send a professional, branded quote the client signs to approve before the job starts, then turn the saved estimate straight into an invoice and add the deposit or payment schedule there. It is $29.99/mo or $239.99/yr, about $20/mo on annual, with a 7-day free trial.
Keep reading
- Contractor Invoice Template: a clean layout for the statement step.
- Client Communication Templates for Contractors: wording for the reminder and demand letter.
Sources
State statutes
- California Civil Code §8412, direct contractor lien deadline, captured 2026-09-25.
- California Civil Code §8800, progress payment and the 2 percent monthly penalty, captured 2026-09-25.
- Florida Statutes §713.08(5), claim of lien recording deadline, captured 2026-09-25.
App Store
- SimplyWise Cost Estimator on the App Store, 4.8 rating, verified 2026-09-25.
Frequently asked questions about outstanding invoices
The basics
What counts as an outstanding invoice?
Any invoice sent but not yet paid, whether the due date has passed or not. It becomes overdue, or past due, once that date has come and gone.
What is the difference between outstanding and overdue?
Outstanding is the full unpaid list, including invoices still inside their terms. Overdue is the smaller group inside it: the due date has passed. Every overdue invoice is outstanding, not every outstanding invoice is overdue yet.
Collecting it
Can I charge a late fee on an unpaid invoice?
Only if your contract or the estimate the client signed stated the rate before the work started. A fee added after the invoice is already outstanding is a request, not an enforceable charge.
When should I send a demand letter?
After a reminder and a formal statement have both gone unanswered. State the amount, invoice number and date, and a firm deadline, delivered a way you can prove was received.
Escalating and preventing it
How long do I have to file a mechanics lien on an outstanding invoice?
It depends on the state and runs from a project date, not your invoice date. California gives 90 days after completion, or 60 after a recorded notice of completion. Florida gives 90 days after final furnishing. Confirm your own state’s deadline.
Can I quote the job from a photo before I invoice it?
Yes. SimplyWise Cost Estimator turns a job-site photo into an itemized estimate in about 6 seconds. Add the measurements you took on site, and every line stays editable. The invoice then matches what the client signed.
Send the quote, then invoice the deposit.
A branded, signed quote up front is the cheapest fix for an outstanding invoice later. Free to try, then $29.99/mo or $239.99/yr after a 7-day trial.