How to Bill Someone and Collect What You’re Owed

To bill someone and collect what you’re owed, send a clear, itemized invoice with firm payment terms, track it, and escalate methodically if payment doesn’t arrive: a written reminder, a formal demand letter, then small claims court or a collection agency. The steps below cover what to put on the invoice, how to deliver it so you can prove it arrived, and what remedies you have when a client goes silent.

What Belongs on the Invoice

An invoice is both a payment request and a legal record. Leave out a key piece of information and you risk delayed payment, or a weaker position if the balance ever ends up in front of a judge. Every invoice you send should include:

  • Your full legal name or business name, mailing address, phone number, and email.
  • The client’s full legal name and address.
  • A unique, sequential invoice number that prevents duplicate payments and keeps bookkeeping clean on both sides.
  • The invoice date and a specific due date.
  • An itemized description of the work or goods: each task or item, the date it was performed or delivered, the quantity, the unit price, and a line total.
  • The subtotal, any applicable sales tax, and the total due, shown prominently.
  • Payment terms: when the balance is due, accepted payment methods, and any late-fee policy.

Vague descriptions invite pushback. “Consulting services — $3,000” gives a client room to argue. A line-by-line breakdown with dates, hours, and rates shows exactly what they are paying for, and gives you something to point to if you ever need to prove the debt in small claims court.

Match the billing structure to whatever you agreed to before work started: a flat fee, an hourly rate, milestone payments, or a retainer drawn down over time. Whichever you use, show the math. Rate, quantity, line total. If your agreement covers reimbursable expenses, list them separately and keep the receipts available.

Collect a W-9 Before You Pay Contractors

If your business pays an independent contractor, freelancer, or attorney $2,000 or more in a calendar year (for tax years beginning after 2025), you generally have to file Form 1099-NEC.1Internal Revenue Service. 2026 Publication 1099 For that you need the payee’s taxpayer identification number, either a Social Security Number or an EIN. The standard way to collect it is to have the payee complete a Form W-9 before you issue the first payment.2Internal Revenue Service. Instructions for Forms 1099-MISC and 1099-NEC Getting the W-9 upfront avoids a scramble at tax time and protects you from backup withholding penalties if the payee later refuses to provide one.

Setting Payment Terms and Late Fees

Payment terms tell the client when you expect to be paid and what happens if they aren’t. The most common arrangement is Net 30 — the full balance is due within 30 days of the invoice date. Net 15, Net 45, and Net 60 all show up depending on industry norms and the strength of the relationship.

Offering a small discount for fast payment can move money into your account weeks sooner. The classic format is “2/10 Net 30”: a 2% discount if the client pays within 10 days, otherwise the full amount in 30. On a $10,000 invoice, that’s $200 in exchange for being paid 20 days early. Spell any discount out in the payment terms section of every invoice so there is no confusion.

Late Fees That Will Actually Hold Up

A late-fee clause gives clients a reason to pay on time and compensates you for carrying an unpaid balance. To enforce one, two conditions generally need to be met: the client must have agreed to the fee before the work began (in a contract, engagement letter, or clearly stated invoice terms), and the fee must be reasonable.

More than 30 states set no specific cap on late fees for commercial invoices, but courts in those states can still strike down a charge they consider unreasonable. Among states that do set limits, annual caps commonly fall in the range of roughly 10% to 24%. A widely used benchmark that stays comfortably below most state limits is an annual rate between 5% and 12%, applied monthly. A 12% annual rate works out to 1% per month on the unpaid balance. Whatever rate you choose, state both the percentage and how it’s calculated on every invoice.

Delivering the Invoice So You Can Prove It Arrived

The moment your invoice reaches the client, the payment clock starts. How you deliver it matters for speed and for your ability to prove receipt later.

  • Email as a PDF attachment. A non-editable PDF creates a digital timestamp and prevents the recipient from altering the amounts. This is the standard for routine billing.
  • Online invoicing or procurement portals. Many corporate clients require you to submit through a specific portal that tracks the document through internal approvals. Use the wrong channel and you can lose weeks.
  • Certified mail with return receipt. For high-value invoices or situations where you anticipate a dispute, USPS Certified Mail with a return receipt gives you a signed record that the recipient got the document.3USPS. Certified Mail – The Basics

If your contract specifies a delivery method, use it. Delivering through an unapproved channel hands the client a technical reason to delay.

Following Up When the Due Date Passes

Once the invoice is out the door, you need a system to track it. Most accounting software (QuickBooks, FreshBooks, Xero, Wave) shows whether an invoice has been viewed, is overdue, or has been paid. If you invoice manually, keep a spreadsheet with each invoice number, client, amount, date sent, due date, and status.

If the due date passes with no payment and no communication, send a polite reminder within a few days. Reattach or link to the original invoice, restate the total, and mention any late fee that has begun to accrue. Most late payments resolve here. People get busy, invoices get buried, and a quick nudge is often enough.

If a second reminder goes unanswered, follow up by phone or a more formal written notice. At every step, log the date, the method, and what was said or sent. That log becomes evidence if the account has to be escalated.

When Reminders Stop Working

Move through escalation in order — demand letter, then court or collections. Working through the steps shows a court that you gave the client every reasonable chance to pay.

The Demand Letter

A formal demand letter is usually the last step before legal action. It should contain:

  • A clear statement of the amount owed, with a breakdown showing the original invoice total plus any accrued late fees.
  • A reference to the contract or agreement that created the obligation.
  • Copies of the original invoice and prior reminders.
  • A specific deadline for payment, typically 10 to 30 days from the date of the letter.
  • A statement that you intend to pursue legal remedies (small claims court or a collection agency) if the deadline passes.

Send the demand letter by certified mail so you can prove the client received it. Keep a copy of the letter and the mailing receipt in your file.

Small Claims Court

If the balance is within your state’s small claims limit, filing is a relatively fast, inexpensive option. State monetary limits range from as low as $2,500 to as high as $25,000, and some states set a lower cap for business plaintiffs than for individuals. Filing fees are generally modest and you typically don’t need a lawyer. Bring your signed contract if you have one, copies of every invoice and reminder, your communication log, and proof of delivery. The stronger the paper trail, the easier it is to prove the debt.

Collection Agencies

For debts that aren’t worth the time or cost of a lawsuit, an outside collection agency is another route. Agencies typically take a percentage of what they recover, often 25% to 50% depending on the age and size of the debt. One legal wrinkle worth understanding: when you collect your own unpaid invoices under your own business name, the federal Fair Debt Collection Practices Act generally doesn’t apply to you. If you use a different name that suggests a third party is collecting, you could be treated as a debt collector subject to the Act’s restrictions. Once you hand the account to an outside agency, that agency is fully covered by the FDCPA.4Federal Trade Commission. Fair Debt Collection Practices Act

Don’t Let the Statute of Limitations Run Out

Every state sets a deadline for filing a lawsuit over an unpaid debt. For claims based on a written contract, those deadlines range from as few as 2 years to as many as 20 years depending on the state. Once the statute of limitations expires, you lose the right to sue even if the debt is still legitimate. That’s the strongest argument for acting promptly rather than letting an unpaid invoice sit for months or years.

Records to Keep and Taxes to File

Every invoice you issue supports the income on your tax return, and every invoice you receive from a contractor may trigger a 1099-NEC.

Starting with the 2026 tax year, you must file Form 1099-NEC for anyone (not an employee) you paid $2,000 or more for services in the course of your trade or business.1Internal Revenue Service. 2026 Publication 1099 The threshold was $600 for tax years through 2025.5Internal Revenue Service. Am I Required to File a Form 1099 or Other Information Return You must also file a 1099-NEC for payments to attorneys regardless of whether the firm is incorporated. The filing deadline is January 31 of the year following payment.

The IRS wants you to keep records that support your income, deductions, and credits for as long as they could matter in an audit. The general timelines:6Internal Revenue Service. How Long Should I Keep Records

  • 3 years from the date you filed the return, in most situations.
  • 6 years if you failed to report income exceeding 25% of the gross income shown on your return.
  • 7 years if you claimed a deduction for a bad debt or worthless securities.
  • 4 years for employment tax records, measured from the date the tax was due or paid, whichever is later.
  • Indefinitely if you didn’t file a return or filed a fraudulent one.

Holding all invoices, contracts, and payment records for at least seven years covers the most common audit scenarios with room to spare.

One Boundary Worth Noting

Standard business invoicing — billing for work already completed and expecting a single payment — does not trigger the federal Truth in Lending Act. TILA applies only when a creditor regularly extends credit to consumers for personal, family, or household purposes, and the credit involves a finance charge or is payable in more than four installments.7eCFR. 12 CFR Part 226 – Truth in Lending (Regulation Z) If you do offer installment plans or financing to individual consumers as a regular practice, Regulation Z may require you to disclose the APR, total finance charge, and other credit terms in writing before the consumer commits. For most businesses sending straightforward invoices, it doesn’t apply.