Library · Small business finance · Published 9/30/2026
Invoicing and getting paid faster
A plain walkthrough of writing invoices, setting terms, making payment easy, and weighing the fees and discounts that come with getting paid sooner.
In short
A friend of mine ran a small print shop for eleven years, and he told me the hardest part was never the work. It was the waiting. If you send bills, you have probably felt that same knot in your stomach when rent is due and a client's check is not. This guide explains how invoices work and what they cost. An invoice is a written bill that names what the customer bought, what they owe, and the date it is due. Many owners send one the day the job is done and print the due date on it. Many also list the ways to pay, such as a link, a card, or a bank transfer. Some send a short reminder before the due date and another after it. Your money is your own, so treat its arrival like the business matter it is.
The whole of it
What it is
I once watched a plumber finish a fine repair, shake a customer's hand, and then wait three weeks for a payment he could have had by supper. Nobody was being unkind. The customer simply had not been asked in a clear way. An invoice is that clear ask. It is a written bill that tells a customer what they bought, what they owe, and when the money is due.
If you are holding a stack of unpaid bills of your own, you know why this matters. Your suppliers do not accept promises. They accept money. When your customers pay late, you are lending them cash for free, and you never agreed to that loan.
A good invoice does not need to be fancy. It needs a few plain parts. Put your business name and contact details at the top. Add the customer's name, a unique invoice number, the date you sent it, and the due date. List each item or hour with its price. Show the total, and say how you accept payment. That leaves the reader no reason to pick up the phone and ask what to do next.
How it works
You have probably noticed that people pay the bills that are easy and put off the ones that are not. So the whole game is to make paying easy and make waiting a little less comfortable.
Start with speed. A bill sent the day of the job lands while the work is fresh and the customer is still pleased with you. A bill sent three weeks later lands in a pile. Many owners send theirs the same day for that reason.
Next comes the due date. Many small businesses use terms like net 30, which means the full amount is due thirty days after the invoice date. Some choose shorter terms, such as net 15 or due on receipt. Some ask a brand new customer for a deposit up front. The terms you pick are yours to set, and the customer should agree to them.
Then think about how the money moves. Every extra step slows it down. A customer who must find a stamp, write a check, and mail it will wait until Friday, and then Friday will pass. A customer who can click a link and pay by card or bank transfer might pay before lunch. Card payments and online invoice tools often charge fees, so read the price list before you pick one. That fee is a real cost, and the worked example below shows how to put a number on it.
Some owners add a small early payment discount, like 2 percent off if paid within ten days. Others add a late fee. Both are used. Whichever one you set, it belongs on the invoice and in your first agreement, so no one is surprised. People rarely resent a rule they read before they signed.
Follow up as a habit. Many owners send a gentle reminder a few days before the due date, another on the day, and a firm note a week after. Write these messages as one friendly person to another. Late payers are often just busy, and they forgot.
The numbers, and where to find yours
A few figures set by law or by your own contracts matter here. I will not guess at them, because they change and because your state may differ from mine.
If you charge sales tax, the rate is set by your state and sometimes your city or county. Your state revenue department publishes the rate. Check that page for the current figure before you put a rate on an invoice. The reporting threshold for payments you make to independent contractors is the current figure, which the official source publishes each year, and it is set by the IRS. You can find the current figure on the IRS page for Form 1099 NEC and in its instructions.
If you take payments by card, your processor sets its own fee, and it is written in your merchant agreement. Look for the percent and the flat amount per sale. The rules on charging interest for a late bill depend on your state and on your contract. Your state attorney general's office can point you to the rules that apply to you. The U.S. Small Business Administration also supports local small business development centers, and they offer free advice.
Your own numbers are the last piece. Find your average days to get paid by taking the date each invoice was paid, subtracting the date it was sent, and averaging the results. That single figure tells you how long you are lending your money.
A worked example
Let me tell you about Maria Alvarez, who runs a small landscaping business. She had been sending invoices at the end of each month and had never chased anyone. Her customers paid, on average, about forty days after the work.
Maria decided to change three things. She would invoice the same day. She would add a card payment link. She would offer 2 percent off for paying within ten days.
Take one job. She charged 1,200 dollars for a spring cleanup. With the early payment discount, the customer who pays in ten days owes 1,200 minus 24 dollars. The 24 dollars comes from 1,200 times 0.02. So the customer pays 1,176 dollars.
Now the card fee. Say her processor charges 2.9 percent plus 30 cents. Two point nine percent of 1,176 dollars is 34.10 dollars, rounded to the nearest cent. Add the 30 cents and the fee is 34.40 dollars. She keeps 1,176 minus 34.40, which is 1,141.60 dollars.
Now compare that to the old way. If the same customer paid by check in forty days, she would keep the full 1,200 dollars, but she would wait thirty extra days. The faster route costs her 58.40 dollars, which is 1,200 minus 1,141.60. That is the price of getting her money thirty days sooner. She can set that cost beside what her cash is worth to her during those thirty days, such as fuel and payroll she might otherwise cover with borrowed money. Only she knows how those two numbers compare. The choice is hers.
Maria checked her books after two months. Her average time to get paid had dropped, and she felt calmer. That calm is worth something too.
Where it goes wrong
I have made this mistake myself, so I say it kindly. The most common trouble is vagueness. An invoice with no due date, no invoice number, or a fuzzy description of the work invites delay. Fix the paper and half the trouble goes away.
Another trap is silence. Owners often feel awkward asking for money they earned. But a polite reminder is not rude. It is part of the job. Nobody has ever been insulted by a courteous note that says here is your invoice again, and thank you for your business.
Watch out, too, for a discount or late fee that you never mention up front. A fee that appears for the first time on a late invoice can sour a good client. Say it early and keep it fair.
Be careful with fees from payment tools, since they add up across many sales. Read the terms. Check what happens with refunds and disputes. Keep records of every invoice and payment, because you will need them at tax time and if a customer ever disagrees about what was owed.
Last, do not let one slow payer take all your attention. A single overdue account can feel enormous. Keep sending clean invoices to everyone else and keep your routine steady.
Questions to answer before you leave this page
How many days does it take your customers to pay you right now, and do you know that number or only feel it? Does every invoice you send carry a clear due date, an invoice number, and a plain way to pay? Could a customer pay you in under two minutes, and if not, what is standing in the way? What fee does your payment tool charge on a 1,000 dollar sale, and have you worked that out on paper? Have you told your customers your payment terms before the work begins, and put them in writing? Who will send the reminder when a bill runs late, and on which day will it go out? And what would a steadier flow of cash let you do this year that you cannot do today?
Ask about this guide
A model reads this page and answers from it. It will say when the answer is not on the page. Education, not personalized advice.
Written by the site's growth engine and checked by its gates: voice, law and ethics, facts, arithmetic, and sources. Not yet read by a human editor; every page carries the correction process. Rules and dollar limits change every year; figures come from the rules table with their source and date.