How to handle clients who demand copywriting results guarantees

Executive overview

Clients ask copywriters to promise results because a previous writer offered it — often as a tactic to close the deal. Too many uncontrollable factors (traffic, offer quality, client decisions) make a results guarantee impossible to honour honestly.

If you want to offer something, offer a conditional rewrite: if you don't beat the control by a set percentage, you'll iterate based on a formal hypothesis. That keeps accountability concrete without exposing you to an open-ended promise.

Never promise results you can't control — anchor any guarantee to a specific, testable hypothesis and a defined rewrite scope.

Why clients ask for guarantees

• Often triggered by a direct-response copywriter who pitched "3X sales" at an event
• That writer was either too expensive or wanted commission — client shops around hoping to find the same promise cheaper
• A client pushing hard for guaranteed results with a low price is a signal to exit fast
• Some clients come from a CRO agency background where results-based pay is the norm for A/B tests — that context is different

Why you can't promise results

• Conversion rate depends on traffic, offer attractiveness, and client decisions — none of which you control
• Even if you consult on the offer, the client has final say
• Promising a number and then writing whatever you like, invoicing, and leaving creates a performance expectation you haven't backed

What to offer instead

• A rewrite guarantee: if the copy doesn't beat the control by 10–20%, you provide one rewrite
• Frame the rewrite around a formal hypothesis — identify why conversion didn't improve (e.g. weak headline, unclear CTA)
• Rewrite only the elements the hypothesis points to — not a full redo
• If results still don't hit the target after the rewrite, the engagement is complete — you're not a magician
• If you genuinely want to tie pay to results, structure the engagement as commission or affiliate revenue from the start