You Offer Net 30. They Pay in 60. Here Is How That Happened and How To Fix It.

Here is an uncomfortable exercise. Open your accounting system, take your last twenty paid invoices, and calculate the average days from issue to cash. If your terms say net 30 and your number says 52, you do not have late-paying customers. You have net 52 terms that you have not admitted to yet.

I have run this exercise with dozens of founders and the number is almost never what they guessed. The gap between stated terms and actual terms is one of the most expensive quiet numbers in a small business, and it did not appear by accident. You trained it.

The training loop

Payment behavior is learned behavior. Here is the loop, and see if it sounds familiar.

An invoice goes a week overdue. You notice, but the customer is important and you are busy, so you wait. At two weeks you send a gentle note. Nothing. At three weeks you send another gentle note, slightly apologetic in tone, because now it feels awkward. At week five they pay, nobody mentions the delay, and the project continues.

What did the customer's AP process just learn? That your invoices can wait 35 days with zero consequence and zero friction. AP teams, formally or informally, sort vendors into "pay now" and "pay when convenient." Your gentleness, inconsistency, and silence filed you in the second pile. Their most disciplined vendors, the ones who follow up on day 3 like clockwork, sit in the first pile and get paid from the same bank account that made you wait.

This is the key reframe: late payment is rarely about the customer's cash. It is about your position in their payment queue. And queue position is set by your behavior, not theirs.

What net 60 actually costs you

Take a business invoicing $80,000 a month. Every extra day of DSO holds roughly $2,650 hostage. Drifting from 30 to 52 days means about $58,000 permanently locked in other people's bank accounts, money you cover with your credit line, your delayed hires, or your own sleep. If you borrow to bridge it at 12 percent, the drift costs you around $7,000 a year in pure interest for the privilege of being polite.

And that is before the second-order cost: the hours you or your bookkeeper spend chasing, and the relationship tension that builds when frustration finally leaks out in month three.

The five-step fix

1. Measure and say the number out loud. Calculate your real DSO (exact method and benchmarks here). You cannot fix a number you have not faced. Put it on whatever dashboard you actually look at weekly.

2. Make day 3 automatic and inevitable. The single highest-leverage change: a friendly reminder that fires 3 days after due, every invoice, every customer, no exceptions and no mood-dependence. Consistency is the entire trick; it re-sorts you into the "pay now" pile within two cycles. The templates I use for every stage are here.

3. Escalate on a fixed ladder, not a fluctuating temper. Day 3 friendly, day 14 direct with a dated ask, day 30 consequences stated plainly (new work pauses, late fees per contract). Calm and mechanical beats warm-then-furious. Customers can plan around a system; they exploit a mood.

4. Fix the boring blockers proactively. A meaningful share of "late payers" are actually stuck payments: missing PO numbers, a new AP contact, an approval sitting with someone on leave. Every reminder should ask one diagnostic question: "Is anything holding this up on your side?" You will be amazed how often the answer unlocks the money and how rarely anyone had asked. If tone worries you, here is how to be firm without being unpleasant.

5. Reset terms with repeat offenders, at renewal, not in anger. For the customer who pays in 60 no matter what: at the next renewal or project, price the reality. Options: deposits up front, net 15 with a small early-payment discount, or keep net 30 with late fees you actually apply. Frame it commercially, not personally: "our terms are moving to X; here is the early-payment option." Chronic slow payers either accept, negotiate honestly, or reveal they were never going to be good customers.

What I stopped doing

I stopped writing apologetic reminders. I stopped waiting until I was annoyed. And I stopped relying on memory: mine, my calendar's, or my bookkeeper's, because the loop only breaks if day 3 happens every single time. That consistency requirement is ultimately why we built RevCollect: it watches every invoice, drafts the right follow-up with the invoice attached, reads the reply, and remembers the promise, so the system stays mechanical even in the weeks when you are slammed. Tool or no tool, the principle is identical: your receivables reflect your habits, not your customers' character.

Net 30 is not a suggestion you write on a PDF. It is a behavior you enforce with boring, friendly, relentless consistency. Start Monday.

FAQ

Should I charge late fees on net 30 invoices? State them in your contract and invoices, then apply them from the second offense onward. The fee matters less as revenue than as a signal that your terms are real.

Do early payment discounts work? 2/10 net 30 (2 percent off if paid in 10 days) works well with larger customers whose AP systems flag discounts. Do the math first: 2 percent for 20 days is roughly 36 percent annualized, so use it where cash timing genuinely matters.

When should I stop work for non-payment? State the trigger in advance (typically 30 days past due) so it is policy, not punishment. Pausing new work is the most credible lever a services business has.

Is it worth switching customers to net 15? For new customers, often yes; net 15 with a day-3 reminder cadence typically lands cash near day 20. Existing customers should be moved at natural reset points like renewals.