Self-Certification Sick Note: SC2 and UK 7 Day Rule

If you are off work because you are unwell, one of the most confusing parts of the process is knowing when self-certification is enough and when you need a sick note. Many people search for a "self-certification sick note", but in practice those are two different stages of the same absence process.

In the UK, self-certification covers the first 7 calendar days of sickness absence. During that period, you normally tell your employer that you are not fit for work and provide your own statement of sickness if they ask for it. After that, your employer can ask for medical evidence such as a fit note.

This guide focuses on the part people often get wrong: what the SC2 form is for, how the 7 day rule is counted, what your employer can and cannot ask for, and what happens when your absence runs into day 8 and beyond. If you want the broader overview of all sick note rules, read Do I Need a Sick Note for Work?.

What self-certification means in the UK

Self-certification means you confirm your own sickness absence instead of getting medical evidence from a healthcare professional. GOV.UK and Acas both say that if you are off sick for 7 calendar days or less, you do not need to give your employer a fit note. That 7 day period includes weekends, bank holidays, and days you were not scheduled to work.

This is why the phrase "self-certification sick note" can be misleading. A self-certification record is not the same thing as a doctor-issued note. It is your own statement that you were too unwell to work. Employers often collect that statement through an SC2 form, an internal absence form, or an email trail.

The point of self-certification is practical. People should not have to book a GP appointment simply to prove a short illness. It reduces unnecessary appointments and keeps the first week of sickness absence simple for both employees and employers.

How the 7 day rule is counted

The key phrase in the official guidance is 7 calendar days. That means you count every day in a row from the day your illness starts, not only the days you were rostered to work.

If you become ill on a Thursday, day 1 is Thursday.
If you are still off on Monday, the weekend still counts inside the 7 day total.
If you work part time, your non-working days still count when deciding whether you need a fit note.
If you recover and return before the end of day 7, self-certification is usually enough.

This is where many disputes start. Someone who only missed three shifts can still be past the self-certification window if the illness ran across a full week. Acas is clear that the rule still applies even when some of those days were weekends or non-working days.

What counts as day 1

Day 1 is the first day your illness made you unable to work. If you had to leave halfway through a shift because you became unwell, record the illness honestly and follow your employer's sickness reporting process. For SSP and fit note timing, what matters is the actual period of sickness, not just when paperwork is completed.

Why the first week still matters

Even though you do not usually need medical evidence in the first 7 days, the dates still matter. They affect how your employer logs the absence, whether you qualify for sick pay, and when a fit note may be needed next. It is worth keeping a simple record of your symptoms, the date the illness started, and any communication you sent to work.

What the SC2 form is for

Form SC2 is the standard HMRC employee statement of sickness used to support a Statutory Sick Pay claim. GOV.UK says you can use it to ask your employer for SSP and that it can be used to self-certify a sick absence or alongside a fit note.

Not every employer will physically hand you an HMRC SC2 form. Some businesses use their own return-to-work form or HR portal instead. That is normal. The important thing is that the employer gets the information they need about your absence. The SC2 is the best-known template, not the only format.

As of 6 April 2026, GOV.UK says you must be off work sick for at least one full working day to be eligible for SSP. That is a sick pay eligibility rule. It does not change the separate evidence rule that medical proof is not normally required for the first 7 days of absence.

What information goes on SC2

The online SC2 process asks for practical details rather than medical jargon. In most cases you should be ready to give:

your full name and contact details
your National Insurance number
your payroll or clock number if your employer uses one
the date you last worked before your sickness began
the dates your sickness started and ended, or the end date if known
brief details of why you were unfit for work

You do not need to write a perfect clinical summary. Keep it factual and consistent. Your employer mainly needs enough information to understand the dates of absence and process sick pay correctly.

What employers can ask for in the first 7 days

This is where language matters. During the first 7 days, an employer can still ask you to report your sickness, follow the company absence procedure, and complete a self-certification form when you return. They can also ask you to tell them when the sickness started and whether you expect to be back soon.

However, GOV.UK and HMRC guidance draw a line around medical evidence. HMRC says employees are not required to provide medical evidence for the first 7 days of a sick absence. Acas also says an employer should only ask for a fit note from the 7th day of absence, and a healthcare professional might refuse to provide one before then.

In real life, some employers still ask for a doctor letter earlier, especially under enhanced contractual sick pay policies. If that happens, it is sensible to ask what exactly they need the evidence for. It may be an internal policy issue rather than a legal SSP requirement. If they insist on evidence in the first week, current NHS guidance says a healthcare professional may charge a fee and the employer should pay that fee.

What happens on day 8 and after

Once your absence goes beyond 7 days in a row, your employer can ask for a fit note. GOV.UK says that fit notes can be printed or digital, and they can be issued by a GP or hospital doctor, or by a registered nurse, occupational therapist, pharmacist, or physiotherapist.

If you already know you are likely to be absent into the second week, it is worth planning ahead. Do not wait until the last minute. Try to arrange the medical evidence before payroll deadlines and let your employer know if there will be a delay.

Acas also says that if there is a delay getting a fit note, the employee should contact the employer, explain why there is a delay, and say when the note is expected. That is often enough to prevent avoidable conflict.

If your employer wants evidence urgently

If you cannot get a timely NHS appointment and your employer needs private medical evidence for absence management, DoctorCert's work sick note service and online medical certificate service can help with employer-facing documentation where clinically appropriate. The doctor still has to review the history and decide whether a certificate can be issued.

Common self-certification scenarios

I was ill from Friday to Tuesday. Do I need a fit note?

Usually no. That is 5 calendar days in a row, so it still sits inside the self-certification window. You would normally tell your employer you were sick and complete the employer's self-certification process when you return.

I only work Mondays and Wednesdays. Do weekends count?

Yes. The official guidance uses calendar days, not only working days. A part-time worker can still pass the 7 day threshold even if only a small number of shifts were missed.

My employer asked for a note on day 3

Ask whether they need a self-certification form, a return-to-work form, or actual medical evidence. Those are not the same thing. For SSP evidence, the first 7 days are generally covered by self-certification. If the employer is asking for something extra because of a separate internal policy, get that request in writing and check whether they will pay any fee.

I have lots of short absences

Frequent short absences are often managed under an employer's attendance policy. Self-certification still applies to each absence that falls within the 7 day window, but an employer may hold return-to-work meetings, ask about support, or refer you to occupational health. That is different from saying they can automatically demand a fit note for every one-day absence.

Self-certification, SSP, and company sick pay

It helps to keep three separate ideas clear:

Self-certification is the evidence process for the first 7 days of sickness.
Statutory Sick Pay is the legal minimum sick pay system, with its own eligibility rules.
Contractual sick pay is any enhanced company sick pay scheme set out in your contract or handbook.

These overlap, but they are not identical. An employee might be allowed to self-certify the absence while the employer also applies internal rules about notification times, return-to-work paperwork, or enhanced pay beyond SSP. That is why some workplace conversations feel confusing even when the law itself is simple.

If you want a practical explanation of what happens after the self-certification window, including fit notes, private certificates, and employer acceptance, read our guide to online medical certificates for work absence.

When a private medical certificate may help

Self-certification is designed for short illness. Once the absence becomes longer, more complex, or more contested, you may need a doctor-reviewed document instead of your own statement.

Your illness is continuing into day 8 or beyond.
You cannot get a timely GP appointment and your employer needs evidence quickly.
Your workplace wants clear dates and doctor details for HR records.
You need private employer evidence while waiting for an NHS fit note or follow-up review.

DoctorCert is not a replacement for emergency care, your GP, or occupational health. It is a faster route to private doctor-reviewed documentation when that is what your employer or institution needs.

Frequently Asked Questions

Do weekends count towards the 7 day rule?

Yes. The official rule uses calendar days, not only the days you were rostered to work. Weekends and bank holidays count when working out whether you have moved beyond self-certification and into fit note territory.

Do I have to use the HMRC SC2 form?

Not always. The SC2 is the standard HMRC self-certification form for SSP, but many employers use their own sickness absence form or HR system. What matters is providing the information your employer reasonably needs about the dates and nature of the absence.

Can my employer demand a doctor note in the first week?

For SSP evidence, employees are not normally required to provide medical evidence during the first 7 days of absence. Your employer can still ask you to follow internal reporting procedures and complete self-certification paperwork. If they insist on early medical evidence for another reason, ask whether they will cover any fee.

What if I am still sick after day 7?

Once your sickness lasts more than 7 calendar days in a row, your employer can ask for a fit note. If there is a delay getting one, tell your employer why and when you expect to provide it. If you need private employer evidence, DoctorCert can review a request online where clinically appropriate.

Can self-certification and a fit note be used together?

Yes. GOV.UK says the SC2 can be used to self-certify a sick absence or alongside a fit note. In practice, many longer absences begin with self-certification for the first week and then move to a fit note or medical certificate for the period after that.

The practical takeaway

If you are off sick for up to 7 calendar days, start with self-certification. Keep your dates accurate, follow your employer's reporting process, and use SC2 or the company equivalent if asked. If the illness runs longer, switch early to obtaining medical evidence instead of waiting for the issue to become urgent.

When you need private doctor-reviewed evidence for a longer work absence, start your DoctorCert request here.