Every client I’ve ever had in the UK has required my service company to have indemnity insurance.

It’s even more important if you’re a sole trader because your liability is not limited. If you royally screw something up and get sued, all your assets are on the line.

Indemnity insurance covers you to a certain amount (usually 1,5, or 10 million). And working through a limited company further limits you to losing only what’s in the company, not your personal assets like your home.

I can’t afford it, so I don’t have any insurance.

No, but I do graphics and marketing. Having properly worded contracts is good enough CYA.

Some clients require it.

Where I am it’s required by law, but it only costs about €30 per month

I have to, my professional membership requires me to.