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How to Invoice a Client: Step-by-Step Guide for Freelancers (2026)

Invoicing correctly means getting paid faster and having clear records if disputes arise. Here's everything — what to include, how to send it, and what to do when clients are slow to pay.

📅 May 2026·8 min read·By Chaser

Quick summary

Create an invoice with all required fields (below)
Send it immediately after completing work
Set a specific due date (Net 14 or Net 30)
Include a payment link to remove friction
Follow up if unpaid — starting day 3, then day 7, day 14...

What is an invoice and why does it matter?

An invoice is a formal request for payment. It's a business document that records what work was done, at what price, and when payment is due. For freelancers, it's also your legal record that a debt exists.

A good invoice does four things: (1) tells the client exactly what they owe, (2) sets a deadline for payment, (3) gives them easy payment instructions, and (4) creates a paper trail if you ever need to chase or escalate.

Step 1: Create your invoice

Every professional invoice should include:

Invoice number

A unique reference (INV-001, INV-002, etc.) for tracking

Issue date

When you sent the invoice

Due date

When payment is expected — always specify this explicitly

Your name/business

Full name or business name, email, and address

Client details

Client name, company, billing email, address

Line items

Description, quantity, unit rate, and amount per service

Subtotal and total

Include tax separately if applicable

Payment instructions

Bank details, Stripe link, PayPal — make it easy

You can create a professional invoice using our free invoice template generator — fill in your details and print or save as PDF in under 2 minutes.

Step 2: Choose your payment terms

Payment terms specify when payment is due. Common options:

Term	What it means	Best for
Due on receipt	Payment immediately when invoice is sent	Small one-off projects
Net 7	Payment within 7 days	Trusted regular clients
Net 14	Payment within 14 days	Most freelancers — balances speed with practicality
Net 30	Payment within 30 days	Standard for larger businesses and agencies
Net 60	Payment within 60 days	Large corporates — avoid if possible

Recommendation:Start with Net 14 for new clients. It's professional, fair, and gives clients enough time to process without letting invoices slip into “forgotten.” For established clients with good payment history, Net 7 is increasingly common.

Step 3: Send the invoice promptly

The #1 mistake freelancers make: waiting to send invoices. Every day you delay is a day added to when you'll get paid.

Best practice: send the invoice the same day the work is complete, or on the last day of the project/month for ongoing work. Don't batch invoices or wait for a “convenient” time. Prompt invoicing signals professionalism and sets the tone for prompt payment.

How to send an invoice

Email — attach as PDF, include a clear subject line: “Invoice [number] from [your name] — due [date]”
Include a payment link in the email body (Stripe, PayPal, bank transfer details)
Use invoicing software (Wave, Bonsai, etc.) if you want tracking and reminders built in
For larger clients, check if they have a purchase order (PO) process — using the wrong PO number delays payment

Step 4: Add a payment link

The single biggest lever for faster payment: make it easy to pay. An invoice that requires a client to log into their bank, look up your sort code, and manually transfer funds will be paid later than one with a “Pay now” button.

Options by platform:

Stripe — create a Payment Link in your Stripe dashboard. Clients can pay by card or bank transfer.
PayPal — include your PayPal.me link
Bank transfer — always include full details (sort code, account number, IBAN for international)
Wise — good for international clients to avoid currency conversion fees

Step 5: Follow up if unpaid

About 60% of freelancers receive late payments. If your due date passes with no payment, don't wait. The longer you wait to follow up, the harder it becomes.

The follow-up timeline

Day 1 overdueFriendly reminder — assume it was forgotten

Day 7Firm follow-up — ask for a timeline

Day 14Urgent notice — mention late payment policy

Day 30Final notice — warn of escalation

Most freelancers write these follow-up emails manually, from scratch, every time — which is why they often don't send them at all. Our free invoice email generator has copy-paste templates for every stage.

Or, use Chaser to automate the entire sequence — the right email goes out automatically at the right time.

Common invoicing mistakes to avoid

No due date specified — “please pay when you can” means clients will pay when they get around to it
Vague line items — “web work - $2,000” invites disputes; “Website redesign (homepage, about, contact) — 20 hours @ $100/hr” does not
Sending to the wrong person — confirm the billing contact before sending, especially for larger companies
Inconsistent invoice numbers — gaps in invoice sequences look suspicious and complicate your records
No late payment clause — mention your late fee policy on the invoice itself, not just in the contract
Waiting to follow up — every day you don't follow up is a day the invoice gets further buried in their inbox

Do you need invoicing software?

Not necessarily. A PDF invoice from a template (like our free invoice template) sent by email is perfectly professional.

Invoicing software adds value if you: invoice 10+ clients per month, need automatic time tracking, want recurring invoices, or need your accounting integrated. Popular options: Wave (free), FreshBooks, Bonsai, Invoice Ninja.

What invoicing software typically doesn't handle well: proactive, escalating follow-up on overdue invoices. Most just send one automated reminder. A dedicated tool like Chaser handles the full escalation sequence — which is where the real money is recovered.