Free tool
On-call compensation calculator
Work out what your on-call rotation actually costs — standby pay, weekend and holiday rates, and per-page call-out pay — and what it comes to across a year. Free, no sign-up, nothing leaves your browser.
The four ways teams pay for on-call
Almost every on-call policy is one of these, or two of them stacked. The differences matter most when a rotation is unevenly loaded.
Flat stipend
A fixed amount for carrying the pager — say $500 for the week, or $75 a weekday and $150 a weekend day. Simple to run in payroll and easy to explain. It stops being fair the moment one rotation is quiet and another is paged every night.
Hourly standby rate
A percentage of base hourly pay for every hour outside the business window. Usually somewhere between 10% and 25%. It scales correctly with how much cover you are actually asking for, and it is the model most European working-time rules are written around.
Interrupt / call-out pay
Paid per page, on top of standby, usually at 1.5× base with a one- or two-hour minimum. This is the part that changes behaviour: a noisy alert stops being free, so someone finally fixes it.
Time off in lieu
A day back for a weekend carried. Cheap on the payroll line and popular with engineers, but it is capacity you have already spent — and it quietly does nothing for the people who never get to take it.
Rates teams commonly start from
Starting points, not benchmarks. Real rates vary widely by country, seniority and how tightly the rotation constrains someone's evening — treat these as the middle of a wide distribution and calibrate against your own market.
| Component | Typical range | Applies to |
|---|---|---|
| Weeknight standby | 10–15% of base hourly | Outside the business window, Mon–Fri |
| Weekend standby | 15–25% of base hourly | Whole day, Sat–Sun |
| Public holiday | 25–50% of base hourly | Often the same rate as a worked holiday |
| Flat weekly stipend | $300–$800 per on-call week | Common in US teams that avoid hourly maths |
| Call-out (interrupt) | 1.5–2× base hourly | With a 1–2 hour minimum per page |
Four things to check before you publish a policy
Is standby time working time?
If the constraints are tight enough that the engineer cannot really use the time — a 5-minute response SLA, no travel, a locked-down device — courts in several jurisdictions have treated the whole period as working time, not standby. Loose constraints usually mean only the hours actually worked count.
Exempt vs non-exempt (US)
Under the FLSA, non-exempt employees must be paid for time they are "engaged to wait". Salaried exempt engineers are not owed on-call pay by law — which is exactly why the policy has to be a deliberate choice rather than an omission.
Rest breaks (EU/UK)
The Working Time Directive gives 11 consecutive hours of daily rest. A page at 03:00 breaks it, and the rest period generally has to restart — which is a scheduling problem before it is a payroll one.
Minimum wage floors
A flat stipend spread across a whole week of standby can fall below the hourly minimum once you divide it out. Check the arithmetic in every country the rotation covers, not just the one payroll sits in.
General information, not legal advice. On-call and standby pay are governed by employment law that differs by country and often by state or collective agreement — take a draft policy to counsel before it reaches payroll.
How the numbers are worked out
Base hourly pay is the annual salary divided by 2,080 — a 40-hour week across 52 weeks.
Off-hours cover is everything outside the business window. With a 09:00 to 18:00 window that is 15 hours on each weekday night plus all 48 hours of the weekend — 123 hours a week, or 6,396 a year.
Public holidays are treated as weekdays where the whole 24 hours moves to the holiday rate. The 15 night hours come out of the weeknight bucket rather than being counted twice, and the 9 daytime hours are added, because a holiday is not a working day.
Standby cost is those hours at the rate you set — either as a percentage of base hourly pay, or as a flat stipend for each of the 52 on-call weeks in the year. Only one person carries the pager at a time, so the rotation buys 52 weeks of cover no matter how many people share it.
Interrupt pay is pages per week × 52, each paid for the longer of your average handling time and your minimum call-out, at your chosen multiple of base hourly pay.
Per engineer divides the rotation's total by the number of people in it. That is the budgeting view; individual payouts vary with who drew the holidays.
Frequently asked questions
How much should on-call pay be?
There is no single right number, but most policies land in the same band: 10–25% of base hourly pay for standby outside business hours, or a flat $300–$800 per on-call week, plus 1.5–2× base for time actually worked on a page. The calculator above turns whichever of those you pick into an annual figure so you can compare them on the same basis.
Should on-call compensation be a flat stipend or an hourly rate?
A flat stipend is easier to administer and easier to promise in an offer letter. An hourly rate is fairer when rotations differ in how much cover they demand, and it is the model that maps cleanly onto working-time rules. Many teams run both: an hourly standby rate for carrying the pager, plus per-page call-out pay on top.
Do salaried engineers have to be paid extra for on-call?
In the US, exempt salaried employees are not legally owed on-call pay, though non-exempt staff generally are. Elsewhere — much of the EU, the UK, Australia — standby is frequently compensable by statute or collective agreement. Legal minimums are a floor, not a policy: unpaid on-call is one of the most reliable causes of attrition on an infrastructure team.
How do you budget for on-call across a whole engineering org?
Cost one rotation properly, then multiply by the number of rotations. The calculator gives you a per-rotation annual figure and the uplift it represents on that rotation’s salary bill, which is the number a finance partner will actually recognise.
Does paying for on-call make alert noise worse or better?
Better, if you pay per page. Once every 03:00 alert has a price attached, the cost of a noisy monitor shows up in a budget line rather than in someone’s sleep. That is usually the fastest route to getting the alert tuned.
Is this calculator free?
Yes — free, no sign-up, and nothing you type leaves your browser. Every number is computed locally on this page.
Keep going
Run the numbers on your real rotation
Pagerly's dashboard has the same calculator wired to your actual schedule — it reads the shifts people worked, splits the hours into weeknight, weekend and holiday, and produces a per-person payout sheet you can export for payroll.
How on-call pay works today
A longer read on how compensation is structured across the industry, and where the common policies break down.
What the tooling costs
Compensation is one line; the paging tool is the other. Pagerly is priced per team rather than per seat, which usually moves the second line a long way down.
Put your on-call where your team already is.
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