I've been freelancing long enough to learn this the expensive way: the clients who cause problems are almost always the ones where you skipped the paperwork.
Here are the 5 documents that have saved me from disasters, in order of importance.
1. A proper contract
Not a handshake. Not a "we'll sort the details later." A written agreement covering:
- Scope of work (what you're delivering, what you're not)
- Payment terms (when, how much, what happens if they don't pay)
- Revision limits
- IP ownership (who owns the work after delivery)
- Termination clause
- IR35 status (if you're in the UK)
I use a free contract generator to build mine. Takes 5 minutes.
2. A detailed quote or proposal
Break the project into phases with costs per phase. This does two things:
- Makes scope creep visible ("that wasn't in the quote")
- Lets clients see where their money goes
I built a project quote calculator that handles the maths.
3. An onboarding document
Send this after they say yes. It covers:
- What you need from them (assets, access, contacts)
- Your working hours and communication preferences
- How you handle changes and revisions
- Payment schedule with dates
This sets expectations before work starts. Most client problems come from mismatched expectations.
4. A professional invoice template
Your invoice should include:
- Your business name and address
- Client's name and address
- Invoice number (sequential)
- Date issued and payment due date
- Line items with amounts
- VAT if applicable
- Your bank details or payment link
- Your UTR or company number
I use this free invoice generator — fills everything in and exports to PDF.
5. A payment chase sequence
Have your chase emails written before you need them. When an invoice goes overdue, you don't want to be crafting emails while angry.
The sequence I use:
- Day 1 overdue: Friendly reminder
- Day 7: Firmer follow-up with payment details
- Day 14: Formal notice mentioning statutory interest rights
- Day 21: Final demand with deadline
- Day 30: Letter before action
Payment reminder generator — pick the tone, get the email.
The boring truth
None of this is exciting. Nobody starts freelancing because they love writing contracts. But the freelancers who survive long-term are the ones who treat it like a business, not a hobby.
The tools above are all free. If you want the complete template pack (contracts + invoices + chase emails + onboarding docs), I'm running a 50% off launch sale this week — code LAUNCH50.
What documents do you wish you'd had from day one?
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