Risk Allocation
Warranties given by the freelancer
A warranty is a promise about the quality or outcome of your work, and promising perfection or specific business results you cannot control is a trap. The safer standard is that you will do the work with reasonable skill and care and that it will match the agreed spec. Guaranteeing sales, rankings or an error-free product invites a claim whenever reality falls short.
What to look for
What the freelancer is promising the work will be or do. Look for open-ended warranties (error-free, fit for every purpose, will achieve specific business results) versus reasonable, effort-based warranties.
How Clause rates it
Wording you can ask for
The Freelancer warrants that the Services will be performed with reasonable skill and care and that the deliverables will materially conform to the agreed specification. No other warranties are given, and the Freelancer does not warrant any specific commercial result or that the deliverables will be error-free.
The UK angle
The Supply of Goods and Services Act 1982 already implies a term that services are carried out with reasonable skill and care, so an express warranty on that standard is normal and unsurprising.
See this on your own contract.
Paste your contract and watch these rules light up your own clauses.