Without a written policy, your out-of-hours rules are made by whoever answers at 23:00, tired, on the third call of the evening. Sometimes that means driving across the county for a dripping tap; sometimes it means a genuine gas smell gets a callback in the morning. Both are failures of the same missing document, and writing it takes an afternoon.
Define an emergency by consequence, not by urgency
Start by defining an emergency by consequence, not by urgency. To a customer, everything is urgent. Write the list in terms of what happens if it waits until morning: water actively escaping and no way to isolate it, no heat when it is below freezing and someone vulnerable is home, a smell of gas, exposed live wiring, a blocked only-toilet in an occupied home. Everything else is next-business-day work, and saying so plainly in advance is kinder than deciding it call by call.
Then decide what a caller hears when nobody picks up. Three outcomes, all explicit. A genuine emergency gets a number that reaches a person now, or an immediate safety instruction. A non-emergency gets a specific promise — "we open at 07:00 and will call you before 09:00" — which is a real answer, not a brush-off. And anything involving gas, live electricity, or major flooding gets safety instructions before it gets a booking. Silence is the only outcome that is always wrong.
Safety scripts come first, then an honest on-call rota
Safety instructions come before scheduling, always. If somebody smells gas, they need to be told to open windows, avoid switches, leave, and call the emergency gas line — before anyone discusses a visit. If water is pouring through a ceiling, they need the stopcock location and the consumer unit off. Write these out as short scripts so a stressed person reading them at midnight does not have to compose from memory, and put them where they can be read without logging in.
Staff the rota honestly. Name who is on call each night, how they are compensated whether or not the phone rings, what happens when they do not answer within a set time, and who is second in line. An on-call rota that exists only as an assumption that "whoever is free will pick up" is not a rota — and it fails on the exact night everyone assumes someone else has it, which is usually a holiday weekend.
Say the emergency price on the phone
Price emergencies before you go, not after. A callout premium is entirely reasonable; a surprise premium on the invoice is how good work turns into a chargeback and a review. Say the number on the phone — the callout rate, the hourly rate after hours, the minimum charge — and make sure the person taking the call is allowed to say it without checking with anyone. If you cannot quote a range, you have a pricing problem rather than a communication one.
Test the policy the way a customer would
Test the policy the way a customer would. Once a quarter, call your own number at 22:00 on a Sunday and listen to exactly what happens. Then read last quarter's out-of-hours calls and mark which were genuine emergencies by your own written definition. If most were not, your definition is not reaching customers early enough — put it on the booking confirmation and the contact page, where people read it before they need it.
Write the policy on one page and put it where callers see it
Write the emergency definition as a short list of consequences, not adjectives, and publish it on your contact page and in every booking confirmation. Customers who know your definition in advance self-select far better than customers who learn it from a tired argument at midnight.
Draft the out-of-hours greeting as three branches — genuine emergency, everything else, and safety — and record it in the caller's own language, with a specific opening time rather than 'as soon as possible'. A named hour is a real answer; 'soon' is heard as a refusal.
Review last quarter's out-of-hours calls against your written definition and count how many were genuine. If most were not, the problem is usually reach rather than wording: the definition exists but customers meet it too late, after they have already decided the situation is urgent.
Frequently asked question
What counts as a real emergency for a service business?
Define it by what happens if the work waits until morning rather than by how urgent it feels. Typical genuine emergencies are water escaping with no way to isolate it, no heat below freezing with a vulnerable person at home, a smell of gas, exposed live wiring, and a blocked only-toilet in an occupied home. Anything else is next-business-day work — and gas, electrical, and major flooding calls need safety instructions before any booking is discussed.