DEV Community: Giuseppe Tumino

The most expensive invoice is the one you forgot to send

Giuseppe Tumino — Sun, 14 Jun 2026 22:22:55 +0000

Ask a freelancer about cash-flow problems and they'll tell you about late-paying clients. Real problem. But there's a quieter, more expensive one almost nobody tracks: the work you finished and never invoiced.

The extra revision you did on Friday. The "quick favor" that took two hours. The milestone you completed but forgot to bill because you were already deep in the next project. None of it is "late", it's just invisible. And invisible work is unpaid work.

Why it happens

Invoicing is a context switch. You're in maker mode, designing, writing, coding, and stopping to log billable work breaks the flow. So you tell yourself you'll "do invoices later." Later, you can't fully remember what you did. You round down. You skip the small stuff. Over a year, that rounding-down is real money.

The fix: a running "unbilled" list

The habit that fixed this for me is embarrassingly simple:

The moment you finish something billable, log one line. Client, what it was, hours or amount. Ten seconds, while it's fresh.
Once a week, turn that list into invoices. Everything on it becomes a line item. Then clear it.
The list should make you slightly uncomfortable. If there's a lot on it, that's money you've earned but haven't asked for, exactly the nudge you want.

That's it. The discipline isn't in remembering at invoice time (you won't), it's in capturing at finish time (ten seconds, in flow-friendly form).

Make the list impossible to ignore

A note app works. But the reason I built Get Paid OS around this is that an "Unbilled work" view sitting next to your money dashboard is much harder to ignore than a buried note, and it rolls each item straight into an invoice with the days-overdue tracking already attached. (Notion template or standalone app.)

But the tool is secondary. The principle is the win: capture billable work the second you finish it, bill weekly, keep the list uncomfortable. Do that and you'll invoice more than you do now, not by working more, but by stopping the quiet leak.

What's your system for catching billable work before it disappears? Genuinely curious, this is the freelance habit I see people skip most.

How much late fee can a freelancer actually charge? (and how to collect it)

Giuseppe Tumino — Sun, 14 Jun 2026 11:26:51 +0000

You delivered the work. The invoice is weeks overdue. And somewhere in your contract there's a line about a "late fee" you've never actually charged, because you're not sure you're allowed to, or how much, or how to bring it up without torching the relationship.

Let's fix that. Here's the practical version for freelancers.

Can you even charge a late fee?

Generally, yes, if it's in your contract or on the invoice before the work starts. A late fee you invent after an invoice goes unpaid is much harder to enforce. So the real move is to put it in writing up front, where it quietly does its job: clients pay on-time invoices faster when they know there's a clock.

(Exact rules vary by country and sometimes by state/region, check your local statutory limits. This is a practical guide, not legal advice.)

How much is normal?

Two common structures freelancers use:

Percentage per month, e.g. 1.5% per month on the overdue balance (works out to ~18%/year). This is the most common and scales with how late they are.
Flat fee, e.g. $25, $50 per overdue invoice. Simple, predictable, good for smaller invoices.

A reasonable, defensible default is 1.5% per month after a short grace period. High enough to matter, low enough to look professional rather than punitive.

Put it in your contract (steal this line)

"Invoices are due within [15] days. Balances unpaid after the due date accrue a late fee of 1.5% per month (or the maximum permitted by law), calculated from the due date."

That single sentence does more for your cash flow than any chase email.

How to actually bring it up

When an invoice crosses into "seriously late," a vague threat ("there may be fees") gets ignored. A specific number doesn't. Compare:

❌ "Please note late fees may apply."
✅ "As per our agreed terms, the invoice is now 21 days overdue, so a 1.5%/month late fee of $15 applies, total now due $1,215. Please confirm when I can expect payment."

The second one is calm, factual, and impossible to misread.

Don't do the math by hand

Working out the fee for each late client is exactly the kind of friction that makes you skip it. I built a free late fee calculator, enter the invoice and due date, and it gives you the fee, the new total, and the ready-to-send line above. No sign-up.

And if tracking which invoices are late (and what each one now owes) is the real headache, that's the whole point of Get Paid OS: it counts the days overdue automatically and hands you the email, fee included, as a Notion template or a standalone app.

The takeaway

A late fee isn't about squeezing clients. It's a polite, pre-agreed incentive to pay on time, and most of the value comes before you ever charge it, just from clients knowing it exists. Put the line in your contract today. Future-you, chasing a 30-day-late invoice, will be grateful.

Do you charge late fees? What structure works for you, flat or percentage? Curious what other freelancers actually do.

How to chase an overdue invoice without being awkward (3 email templates)

Giuseppe Tumino — Sun, 14 Jun 2026 11:09:03 +0000

Every freelancer knows the feeling: the work is delivered, the invoice is sent, and then… silence. The due date passes. A week goes by. And the longer you wait, the more awkward it feels to bring it up.

After tracking a year of my own invoices, I noticed something that changed how I get paid: the invoices I chased on a fixed schedule got paid 2-3 weeks faster than the ones I chased "when I remembered." The difference wasn't the client. It was my timing, and my wording.

Here's the system.

1. Use a fixed follow-up cadence

Stop deciding case-by-case when to nudge. Pick a cadence and apply it to every invoice:

+3 days overdue, a gentle, friendly nudge
+10 days, a firmer, clearer reminder
+20 days, a final notice with next steps

When it's automatic, you never agonize over "is it too soon?", and clients learn you actually track this.

2. Send the right tone at the right time

The wording matters more than people expect. "Just checking in!" is easy to ignore. A calm, specific ask is not. Here are the three I use:

Friendly nudge (1-7 days late)

Hi [Name], I know inboxes get wild, invoice [INV-014] for $1,200 was due on May 30 and I haven't seen it land yet. Could you check on it when you get a sec? Thanks so much!

Firm reminder (8-19 days late)

Hi [Name], this is my second reminder for invoice INV-014, now 12 days overdue. Please confirm the payment date this week. If there's an issue with the invoice, let me know today and I'll sort it.

Final notice (20+ days late)

Hi [Name], despite previous reminders, invoice INV-014 is now 21 days overdue. Per my terms, a late fee of 1.5%/month applies. If payment isn't received by [date], I'll have to pause ongoing work. I'd much rather resolve this, please get in touch today.

3. Track "unbilled work" too

The most expensive invoice isn't the late one, it's the one you forgot to send. Keep a running list of finished work that hasn't been invoiced yet, and bill it weekly. That habit alone has recovered more money for me than any chase email.

4. Know what you're owed

If your contract includes a late fee, calculate it before you send the final notice, a specific number ("$15 late fee, total now $1,215") lands harder than a vague threat. I built a free late fee calculator that also writes the line for your email.

Make it effortless

If writing these from scratch every time is the part you avoid, I made two free tools, no sign-up:

Overdue invoice email generator, pick the tone, get the email.
Late fee calculator, what they owe + a ready line.

And if you want the whole thing in one place, a dashboard that tracks every invoice, counts the days overdue, and hands you the right email automatically, that's what I built Get Paid OS for (Notion template or standalone app).

But honestly? Even just adopting the +3 / +10 / +20 cadence with the templates above will change how fast you get paid. Steal it.

What's your follow-up cadence? Drop it in the comments, I'm always refining mine.