Who Covers Your Friday? The Four-Day Week Questions the Offer Letter Won't Answer

You see it in the job ad, or it arrives in the all-staff email: we're moving to a four-day week. The extra day off is the headline, and it's a seductive one. But a four-day week isn't a perk bolted onto a five-day job. It's a redesign of how work gets done — meetings, cover, targets, handovers, the lot. If that redesign hasn't actually happened, you won't be working four days. You'll be working five days in four, and the missing day will reappear as evening calls, "quick" Friday emails, or a low-grade resentment you can't quite name.

So treat the offer as a values document. What does it say about how this employer handles workload, trust, cover and the messy human business of who picks up the slack when someone is away?

Start with the arithmetic

Ask the boring question first: is this full-time pay for reduced hours, or a 0.8 contract? Both exist, and both can be legitimate — but they are not the same deal. If your salary is pro-rated, check everything that hangs off it: pension contributions, bonus eligibility, overtime, sick pay, maternity and adoption pay, and redundancy calculations if the worst happens. Check holiday entitlement too. Twenty-five days pro-rata at 0.8 is twenty days, and bank holidays are usually pro-rated as well. Ask for the numbers in writing, not in a chat.

If the offer is full-time pay for four days, ask how the organisation is funding it. Was there a productivity review? Did they cut meetings, or client work, or headcount? "We just made it work" is a lovely sentiment and a terrible answer.

Compression is not the same as flexibility

A compressed week means the same total hours over four longer days — often 9 or 10 hours plus a commute. A true four-day week means fewer hours. Both can be good; they ask different things of your body, your caring responsibilities and your evenings. If you're compressing 37.5 hours into four days, ask about core hours, start and finish times, and whether the team expects you to be reachable on the fifth day. "Occasionally" is doing a lot of work in that sentence.

Meetings are where the truth leaks out

A genuine four-day week changes meeting culture. Defaults get shorter. Updates go async. The Friday all-hands either moves or disappears. Ask directly: what happens to team meetings on the day most people are off? If the answer is "we still run them, you catch up later", you've found the gap. The fifth day isn't off — it's deferred, and you'll be paying it back.

Who covers your Friday?

This is the question that separates a policy from a promise. Is there a rota? A buddy system? Does the team deliberately shrink on Fridays so client calls simply aren't booked? Or are you expected to be "on" for anything urgent, which in practice means anything a senior person decides is urgent at 4pm on a Thursday?

Ask how handover works and who decides what counts as urgent. If cover depends on the goodwill of colleagues who are already stretched, you're looking at a culture of unpaid emotional labour with a nice logo. That's not flexibility. That's a rota-shaped hole.

Probation is where the fifth day hides

Probation is when you're most likely to absorb the shortfall yourself, because you're keen and nobody has told you what to drop. Ask how success is measured in a four-day week, and whether targets and objectives were recalibrated when the pattern changed. If the targets stayed the same while the hours dropped, you've been handed a compression puzzle with your name on it.

A good follow-up: what would it look like if I couldn't fit everything in? Who decides what comes off the list? Listen for whether there's a real answer or a polite shrug.

Ask the people already living it

Don't just ask HR. Ask to speak to someone doing the same role on the same pattern. Then ask the questions that don't make it into the case study:

• What does your Friday actually look like?
• How often do you end up working on your day off?
• What changed after the pilot ended?
• What's the worst part of the pattern?
• Did anyone leave because of it?

Listen for hesitation. Listen for the phrase "it depends". Listen for whether they describe a system or a scramble.

Check whether it's permanent

Ask if the four-day week is a pilot, a policy, or a habit. If it's a pilot, what are the success criteria, who reviews them, and what happens if it's withdrawn? What notice period applies to changing your pattern? A values-led employer will have thought about this. One that hasn't is improvising with your calendar.

Run your own audit

Before you sign, write down what you actually need: a protected day, no expectation of email, cover that doesn't rely on you being quietly available. Then check the contract, the handbook and the flexible-working policy. If it isn't written down, it's a vibe — not a term.

The extra day is not really the point. The point is whether the organisation has redesigned work, or simply moved the same five days into a smaller box and handed you the lid. Ask who covers your Friday. Their answer tells you almost everything.