Direct answer
There is no universal turnover figure for care tenders. A contracting authority may test annual turnover and other financial measures, but conditions of participation must be stated in the tender documents and be proportionate to the contract. Check the exact threshold, accounting period, group or consortium rules, and permitted alternative evidence before deciding.
Find the actual financial test
Look for conditions of participation, financial standing, economic and financial capacity, accounts, ratios, insurance and parent or guarantor provisions. Do not infer the requirement from contract value alone.
Check how the buyer will assess your structure
The documents may explain whether the bidder can rely on a parent, consortium member, subcontractor or guarantor. Any reliance must be permitted and evidenced; it should never be added informally to make a weak figure appear stronger.
Treat affordability separately from eligibility
Passing a turnover threshold does not prove the price can safely deliver the service. Model staffing, on-costs, travel, management, mobilisation, inflation and payment timing before accepting the commercial risk.