If you are unable to work because of illness, you may qualify for Statutory Sick Pay (SSP) from your employer, provided you meet the relevant eligibility rules. Your contract or workplace policy might offer contractual sick pay, which can be more generous than SSP, but this depends on the terms. You should tell your employer promptly and may need a fit note if your absence lasts more than seven days. Rates and eligibility rules can change, so check the latest guidance on GOV.UK; your employer should explain why if it says you do not qualify.