SSP For Zero Hours Contracts In The UK: What Employers Should Know

Zero hours contracts give you flexibility to match staffing with demand - but they don’t remove your statutory obligations when someone is off sick.

If you’re unsure when Statutory Sick Pay (SSP) applies to zero hours staff, how to calculate it for irregular hours, or what evidence you can request, you’re in the right place. This guide breaks down how SSP works for zero hours contracts under UK law, and how to set up robust, fair processes that protect your business.

Let’s cover eligibility, calculations, documentation, and the key policies you should have in place so you can handle sickness absences confidently and lawfully.

What Is SSP And Does It Apply To Zero Hours Contracts?

SSP is the statutory minimum you must pay eligible staff who are off work due to illness. It’s set by the UK Government and payable for up to 28 weeks. The weekly rate is fixed (and updated each April), and you pay a proportion of that for each “qualifying day” the employee is sick.

SSP can apply to people on zero hours contracts if they meet the usual eligibility rules. A zero hours contract doesn’t automatically exclude someone from getting SSP - what matters is whether they’re your employee for SSP purposes and whether they meet the minimum earnings threshold.

At a glance:

• SSP is a legal minimum - you can choose to offer more generous contractual (occupational) sick pay in your Employment Contract or Staff Handbook.
• Employees qualify if they’re off sick for at least 4 consecutive “qualifying days” (the first three are usually “waiting days” and unpaid) and they earn on average at least the Lower Earnings Limit (LEL) before tax.
• SSP is paid by you through payroll; the previous COVID-19 SSP rebate scheme has ended.

For zero hours teams, the sticking points tend to be: are they your employee for SSP purposes, what counts as their “qualifying days”, and do they meet the LEL based on variable pay? We’ll tackle those next.

Who Qualifies For SSP On A Zero Hours Contract?

Eligibility turns on a few practical questions. As an employer, get comfortable checking these before you make a decision.

1) Do They Count As Your Employee For SSP?

SSP applies to employees (and certain categories like some agency workers). Many zero hours staff are employed under a contract of employment, even if hours are not guaranteed. Others are engaged as “workers” only. In practice, a lot of zero hours arrangements do meet the employee test - especially if you control how, when and where work is done, and there’s mutuality of obligation when shifts are accepted.

Action point: Make sure your engagement terms are clear and consistent. Well-drafted Employment Contracts for employees and separate contractor/worker terms reduce disputes about status and entitlements.

2) Have They Actually Started Work?

To get SSP, an employee must have done some work for you. If someone has a zero hours contract but hasn’t yet worked a shift, they won’t qualify for SSP.

3) Do They Meet The Earnings Threshold?

Employees must earn on average at least the LEL (review the current figure each April) across the “relevant period” before sickness. For zero hours staff with variable pay, you calculate average weekly earnings from the last 8 weeks up to the last normal payday before the sickness started. If they have fewer than 8 weeks’ pay, use what’s available.

Tip: Keep clean payroll records and rotas - variable earnings calculations are much easier when your data is reliable. If you’re worried about timing or cash flow, remember that paying statutory entitlements late can create risk, so ensure your payroll processes are tight. If something slips, understand your obligations around paying employees late.

4) Are They Off Sick For At Least 4 Consecutive Qualifying Days?

SSP kicks in from day 4 of a Period of Incapacity for Work (PIW). The first three qualifying days are usually unpaid waiting days (unless they’re linked to a previous PIW). We’ll explain “qualifying days” for zero hours below - this is an area where clear policy makes a big difference.

5) Have They Given Proper Notice?

You can require employees to follow reasonable sickness reporting procedures (for example, notifying you before a shift). If they don’t, you can legally delay or withhold SSP - but make sure the rule is clearly set out in your policy and applied consistently.

How To Calculate SSP For Irregular Hours And Rotas

The two big tasks for calculating SSP with zero hours staff are defining qualifying days and working out average earnings.

Define “Qualifying Days” For Zero Hours Roles

SSP is paid for the employee’s qualifying days within the sickness period. If you’ve agreed the qualifying days in the contract or policy (e.g. Monday–Sunday, or specific days tied to a rota), use that. If not agreed, the default rule is trickier - it uses a “days normally worked” approach.

Best practice for zero hours teams is to set this out upfront. Options include:

• A fixed pattern (e.g. any day of the week can be a qualifying day), or
• Qualifying days are those an employee was scheduled or would usually be expected to work under the current rota.

Whichever approach you take, state it clearly in your Staff Handbook and contracts to avoid arguments later. If you don’t have one, consider implementing a Staff Handbook with a simple, fair sick pay policy.

Calculate Average Weekly Earnings For Variable Pay

For variable zero hours pay, take the total gross earnings paid in the last 8 weeks up to the last normal payday before the sickness began, then divide by 8 to find the average weekly earnings. Include overtime, commission and similar payments that count as earnings for National Insurance purposes.

If they’ve been paid for fewer than 8 weeks, use the shorter period you have. If there were no earnings in that period, they won’t meet the threshold.

Apply The Weekly Rate To Qualifying Days

SSP is a weekly rate. To pay daily amounts, divide the weekly rate by the number of qualifying days in a week (as defined above), then multiply by the number of qualifying days the employee is sick.

Example: If your qualifying days are Monday to Friday (5 days), and the weekly SSP rate applies, the daily rate is 1/5 of that weekly rate. If the employee is sick for 4 qualifying days, pay 4 x the daily rate (remember the first three qualifying days are waiting days - you pay from day 4).

What About Shifts Already Scheduled?

For a zero hours employee who has accepted a shift, and that day is a qualifying day, it counts towards the PIW. Scheduled work and typical patterns both matter - again, this is why a clear, pre-agreed definition of qualifying days is essential.

Linked Periods Of Sickness

If an employee has a previous PIW in the last 8 weeks, the two may “link”. Linked PIWs can mean there are no new waiting days, and they count towards the 28-week SSP cap. Keep a simple tracker of sickness dates and whether absences link.

Managing Fit Notes, Notification And Evidence

For the first 7 calendar days of sickness, employees can self-certify. From day 8, you can request medical evidence (usually a fit note). You can also set reasonable notification rules - for example, “call your manager at least 2 hours before a shift starts” - provided they’re accessible and consistently enforced.

Sometimes there’s tension between fit notes and your operational needs. If you’re unsure whether you can rely on, question, or refuse medical evidence, tread carefully. There are real risks with ignoring a doctor’s note without proper grounds - it’s worth reviewing your rights and risks around a doctor’s sick note before making a call.

Absence Management That’s Fair And Lawful

After a run of short-term absences, most employers move into an absence management process - return-to-work interviews, trend monitoring, and formal stages where appropriate. Keep it consistent and non-discriminatory. A supportive approach reduces disputes and keeps you on the right side of employment law.

If repeated short-term absences are impacting your business, make sure you’re handling them fairly. It’s a good idea to refresh on what a fair response to frequent sick days looks like before you escalate.

Data Protection And Confidentiality

Health information is “special category” data under UK GDPR and the Data Protection Act 2018. Only collect what you need, limit access, and store it securely. Have a lawful basis and an appropriate condition for processing (such as employment obligations). Don’t hold records longer than necessary - check your retention approach against guidance for ex-employee records.

Build A Clear Sick Pay Policy For Zero Hours Staff

SSP is only part of the picture. As your team grows, a clear, accessible policy helps managers make consistent decisions, reduces back-and-forth with payroll, and gives staff confidence in the process.

At minimum, make sure your policy answers these questions:

• When and how to report sickness (who to contact, by what time, and how often to update you).
• What counts as a qualifying day for zero hours staff.
• What evidence is required and when (self-certification vs fit notes).
• How SSP is calculated and paid (including how waiting days work and what happens with linked absences).
• Whether you offer contractual sick pay (OSP) and how it interacts with SSP.
• How you handle short-term frequent absence, long-term sickness, and return-to-work reviews.

Where to place it? The right place is usually your Staff Handbook and your Employment Contract (for the headline clause). Avoid muddled or template language - tailored wording makes calculations and decisions far easier in practice.

Contractual Sick Pay (OSP)

If you offer OSP, make the rules crystal clear: waiting periods, evidence thresholds, whether OSP tops up to normal pay, and any limits or triggers for review. Remember that OSP can’t reduce statutory entitlements - it can only sit on top of them.

Wage Deductions And Overpayments

Sometimes mistakes happen - for example, if you paid OSP but the fit note later changes the period. You’ll want a clean process to correct errors through payroll. Make sure any recovery is lawful under your contract and the Employment Rights Act 1996. If you’re unsure, revisit the rules on wage deductions before making adjustments.

Mental Health And Reasonable Adjustments

Many sickness absences involve mental health. Manage these sensitively and document your approach. If a condition meets the Equality Act 2010 definition of a disability, you’ll have a duty to make reasonable adjustments. Awareness training for managers, flexible rotas, and supportive return-to-work plans all help. For specific conditions, it’s worth understanding your duties (for example, endometriosis at work can involve tailored support and adjustments).

Handling Edge Cases: Holiday, Unpaid Leave, TUPE And Leavers

SSP often overlaps with other rights. Here are common scenarios with zero hours teams and how to approach them.

Holiday During Sickness

Holiday continues to accrue during sickness. Employees can choose to take paid holiday during sick leave (which you pay at the normal holiday pay rate, not SSP). If someone falls ill during booked holiday, they may ask to convert it to sickness absence and take the holiday later, provided they follow your evidence and notice rules.

Unpaid Leave And Gaps Between Rotas

If a zero hours employee isn’t scheduled and isn’t sick, there’s no SSP to pay for those days. Where someone requests time off that isn’t illness-related, handle it under your unpaid leave policy and the rules on unpaid leave rights. Keep the lines clean between absence types - it makes payroll and dispute management far simpler.

Part-Worked Weeks And Pro-Rata SSP

If someone becomes sick mid-week, you calculate SSP only for their qualifying sick days. If they work some qualifying days and are sick for others, SSP applies to the sickness portion only.

Leavers, Notice Periods And SSP

If an employee is off sick during notice, you may still owe SSP if they’re eligible. Check your notice and termination clauses and ensure payroll processes are aligned to avoid under- or over-payments around the termination date.

Return-To-Work And Ongoing Capability

Use return-to-work meetings to understand any ongoing limitations and whether adjustments are needed. If capability becomes a long-term concern, ensure your process is fair and evidence-based before moving towards formal steps. Keeping consistent documentation is key.

Legal Compliance Checklist For Sick Pay And Absence

Before the next absence lands on your desk, sense-check your setup against this quick checklist:

• Contracts and Handbook: Do your zero hours terms clearly state status, qualifying days, and sickness reporting? If not, update your Employment Contract and Staff Handbook.
• Payroll Alignment: Can payroll easily calculate average weekly earnings for variable hours and apply SSP correctly? Are your processes set to avoid late payments?
• Evidence Rules: Are notification and evidence requirements reasonable, written down, and consistently applied? Do managers know when to rely on a fit note?
• Data Protection: Is health data access restricted and retention periods set in line with your policy and the rules for ex-employee records?
• Fair Management: Do managers follow a consistent, lawful approach to frequent short-term sickness, and know when to consider reasonable adjustments?
• Deductions: If you need to correct payroll, are you handling wage deductions lawfully?

If any of these are shaky, put them on your “fix first” list. Getting your framework right now will save time and reduce risk when the next rota clash, short-notice sickness, or payroll puzzle appears.

Key Takeaways

• Zero hours contracts don’t exclude SSP - eligibility depends on employee status, average earnings at or above the LEL, and at least 4 consecutive qualifying days of sickness.
• Define “qualifying days” for zero hours staff in your contracts or Handbook; it makes SSP calculations and waiting day rules clear and reduces disputes.
• For variable hours, calculate average weekly earnings over the previous 8 weeks before sickness, then apply the weekly SSP rate pro-rata to qualifying days.
• Set reasonable notification and evidence rules, and apply them consistently. Be cautious about rejecting medical evidence - understand your position before you challenge a doctor’s note.
• Protect health data under UK GDPR: collect minimally, restrict access, and keep records only as long as necessary.
• Write everything down: an SSP/OSP policy in your Staff Handbook and clear clauses in your Employment Contract will keep payroll, managers and staff aligned.
• When you need to correct pay or handle frequent absences, follow lawful processes for deductions and fair, documented absence management.

If you’d like tailored help setting up your sick pay policy, drafting contracts, or sense-checking a tricky SSP situation, our team can help. You can reach us at 08081347754 or team@sprintlaw.co.uk for a free, no-obligations chat.