A simple pre-send invoice checklist

A mistake on an invoice doesn't just look unprofessional, it usually adds a week to getting paid. The client has to notice it, write back, wait for a corrected version, and then start their own approval process over again. Thirty seconds of checking before you hit send is almost always faster than that whole loop.

Here's what's worth glancing at every time:

1. The client's name and billing details are right

Especially if you're invoicing a company rather than a person: the legal entity name, billing contact, and billing email can all be different from who you've been emailing.

2. Your own business details are current

Address, tax ID if you use one, and the email or phone number you actually want them to use if they have a question.

3. The invoice number is unique

Duplicate or reused invoice numbers cause real confusion on the client's end, especially if they're matching invoices against a purchase order or internal system.

4. Line items describe the actual work

"Services rendered" tells the person approving the payment nothing. "Homepage redesign, rounds 1–3" tells them exactly what they're paying for, and gives you something to point to later if the amount is ever questioned.

5. The math is right

Rates times quantities, subtotals, and the final total. It sounds obvious until you've manually edited a line item at 11pm and forgotten to update the total underneath it.

6. Tax is applied correctly

Right rate, right jurisdiction, and clearly labeled as its own line rather than folded into the total, so the client can see exactly what it is.

7. The currency is specified, especially across borders

If you bill clients in different currencies, say which one every single time. "$2,000" can mean very different amounts depending on which currency it's read in.

8. Payment terms and due date are unambiguous

"Net 30" is common shorthand, but an actual date ("Due September 21, 2026") removes any question about which day the clock started on.

9. Payment instructions are included

Whatever you accept, e-transfer, wire, a payment link, say so on the invoice itself rather than assuming the client remembers from last time.

10. It reads the way you'd want to receive it

A short thank-you line costs nothing and tends to get invoices opened, and paid, a little faster.

A few of these, invoice numbering, tax rates, currency, your branding, are exactly the kind of thing worth having a tool handle for you automatically instead of re-checking by hand every time. That's most of what we built first with Kava Books. Sign up and get started today.