WFM guideContracts & flexibility

Contact centre annualised hours

Q: What are annualised hours and when do they suit a contact centre?

Annualised hours is a contract under which an employee agrees to work a fixed total number of hours over the year rather than the same number every week. For example, instead of a fixed 37.5 hours every week, an agent might contract 1,800 hours per year, rostered as more hours during peak periods (e.g. 42-hour weeks in the run-up to Christmas) and fewer during quiet periods (e.g. 32-hour weeks in summer), with pay averaged to a stable monthly salary regardless of the hours worked in that particular month. Annualised hours suit a contact centre when: demand has a pronounced and predictable seasonal pattern (a clear peak and trough across the year); the operation currently relies heavily on overtime and temporary hiring to cover the peak (which annualised hours can reduce or replace); and there is enough trough demand to absorb the lower-hours weeks productively. They do NOT suit operations with flat, unpredictable, or purely week-to-week-volatile demand — there, the complexity and the agent-relations risk outweigh the benefit. The model only works if the within-year demand variation is large enough and predictable enough to plan the hours distribution in advance.

Annualised hours contract an annual total of working hours rather than a fixed weekly pattern — letting the operation roster more hours in peak weeks and fewer in quiet weeks while pay stays stable. Done well, it matches labour supply to a seasonal demand curve without overtime or temporary hiring. Done badly, it breeds grievance.

Note on employment law

This guide describes employment law and HR practice as it applies in Great Britain. Employment law varies by jurisdiction and individual circumstances. Always verify the requirements applicable to your situation with your HR team, employment counsel, or ACAS before changing people management practices. This guide is for operational context, not legal advice.

How annualised hours work

Instead of a fixed weekly contract (e.g. 37.5 hours every week), the agent contracts an annual total (e.g. 1,800 hours/year). Those hours are distributed unevenly across the year to follow the demand curve:

Peak weeks (e.g. Nov–Dec)Rostered above average — e.g. 42-hour weeks

Shoulder weeksAround the contractual average — e.g. 37.5-hour weeks

Trough weeks (e.g. summer)Rostered below average — e.g. 32-hour weeks

PayAveraged to a stable monthly salary regardless of that month's hours

The annual total and the pay are fixed; only the distribution of hours flexes. The point is to put contracted, paid-at-standard-rate labour where the demand actually is.

Where annualised hours help

Reduced overtime and temp cost

Peak demand is covered by contracted hours flexing up, rather than by paying overtime premiums or recruiting and training a temporary cohort. The peak labour is already on the books at standard rates.

Labour supply follows demand

Hours are concentrated where the demand is, instead of being spread evenly and then topped up at the peak / wasted in the trough. Better structural match between supply and the demand curve.

Stable pay for agents

Pay is averaged to a consistent monthly amount despite the varying weekly hours — agents get income stability even though their working pattern flexes, which many value over a variable overtime-based income.

Retained, trained capacity at peak

Peak is staffed by permanent, fully-trained agents flexing up, not by lower-tenure temps. Quality and productivity at peak are higher than a temp-heavy model.

Where annualised hours go wrong

Demand-pattern dependency

The whole model rests on the demand pattern being predictable a year ahead. If the forecast peak does not materialise, agents have been rostered for hours the operation did not need; if an unforeseen peak arrives in a planned trough, the contracted hours are not there to cover it.

Agent fairness and predictability

Agents need to know their hours distribution far enough ahead to plan their lives. An annualised contract that lets the employer call hours at short notice within the annual total recreates the unpredictability it was meant to solve — and breeds grievance. Publish the hours pattern early and limit short-notice changes.

Reconciliation complexity

Someone must track hours worked against the annual contracted total throughout the year, and manage the position of agents who are ahead of or behind their pro-rata hours. Leavers mid-year, long-term absence, and new starters all complicate the reconciliation.

Legal and consultation requirements

Moving existing staff onto annualised hours is a change to terms and conditions requiring proper consultation (and, where applicable, union agreement). It cannot be imposed unilaterally. New hires can be recruited onto annualised contracts from the outset more easily.

Does your demand profile suit annualised hours?

Good fit

✓Pronounced, predictable seasonal peak and trough
✓Heavy current reliance on overtime + temps to cover peak
✓Enough trough demand to absorb low-hours weeks productively
✓Demand pattern is plannable 6–12 months ahead

Poor fit

✗Flat demand with little within-year variation
✗Volatile, week-to-week-unpredictable demand
✗No clear, forecastable seasonal pattern
✗Demand spikes that cannot be anticipated a year ahead

Annualised hours questions

What are annualised hours and when do they suit a contact centre?

Annualised hours is a contract where an agent agrees to work a fixed total of hours over the year rather than the same number weekly — for example 1,800 hours/year rostered as 42-hour peak weeks and 32-hour trough weeks, with pay averaged to a stable monthly amount. They suit a contact centre when demand has a pronounced, predictable seasonal pattern; the operation currently relies heavily on overtime and temps to cover the peak; and there is enough trough demand to absorb the lower-hours weeks. They do not suit flat, volatile, or unpredictable demand, where the complexity and agent-relations risk outweigh the benefit. The model only works when within-year demand variation is large and predictable enough to plan the hours distribution a year ahead — and when the hours pattern is published early and short-notice changes are limited.