How Many Employees Does One 24/7 Post Need in Spain?
Holding one position every hour of 2026 in Spain takes 8,766 staffed hours. One full-time employee is genuinely available for about 1,650 of them, so the post needs 5.31 employees, which is 6 whole people.
One ring per person, one year each
Each ring is one employee's year, broken wherever they are on holiday, on leave, or off sick. No single ring closes, which is the whole problem: one person cannot hold a post that never stops.
Stack 6 of them and the picture closes. Trace any line out from the center and it crosses at least one solid arc, so every hour of 2026 has somebody on it. That is the relief factor, drawn rather than asserted.
Where the number comes from
- 1
Staffing one position 168 hours a week comes to 8,766 hours across the year.
- 2
Spain has 261 weekdays in the year, the starting point for one employee.
- 3
Take out 7 public holidays that fall on a weekday, 22 days of statutory paid leave, 14.1 days of average sickness absence, and 3 days of training: 46.1 days lost.
- 4
That leaves 214.9 working days per employee, and at a 38.4-hour week that is 7.68 hours a day, so 1,650 available hours a year.
- 5
8,766 coverage hours divided by 1,650 available hours is a relief factor of 5.31, so the post needs 6 people.
| Weekdays in the year | 261 |
| Public holidays on a weekday | −7 |
| Statutory paid annual leave | −22 |
| Average sickness absence | −14.1 |
| Training and onboarding (assumed) | −3 |
| Working days available | 214.9 |
| At 7.68 hours a day | 1,650 hours |
Paid public holidays are a statutory entitlement in Spain, so they sit on top of annual leave and are deducted separately here.
The training allowance of 3 days is a planning assumption rather than a sourced statistic, and it is deliberately low. Every other figure on this page carries a source. If your operation runs heavy certification cycles, raise it and the relief factor rises with it.
What the usual rule of thumb gets wrong here
The common shortcut is to divide coverage hours by contracted hours and add a quarter for absence. In Spain that gives 5.47 against a derived answer of 5.31, so the shortcut is high by 2.9 percent. A flat buffer travels badly because the things it stands in for, statutory leave and the length of the contracted week, are set nationally.
Nobody ever away. Not a real answer.
The usual shortcut, over by 2.9%.
From Spain's own leave, hours, and absence.
Other coverage shapes
The same availability figure answers any coverage window. Only the hours the post must be staffed change.
| Coverage | Hours a week | Relief factor | People |
|---|---|---|---|
| Round the clock, every day | 168 | 5.31 | 6 |
| Round the clock, weekdays only | 120 | 3.79 | 4 |
| Two shifts, every day | 112 | 3.54 | 4 |
| Extended day, weekdays only | 60 | 1.9 | 2 |
If your contract is more generous
22 days is the statutory floor in Spain, and most employers sit above it. Every extra week of leave is another week the post has to be covered by somebody else.
| Annual leave | Relief factor | People per post |
|---|---|---|
| 22 daysstatutory floor | 5.31 | 6 |
| 25 days | 5.39 | 6 |
| 28 days | 5.46 | 6 |
| 30 days | 5.52 | 6 |
| 33 days | 5.6 | 6 |
The inputs, and what they do not say
How the leave figure is defined
Spanish law states leave in CALENDAR days, not working days: Estatuto de los Trabajadores art. 38.1 sets a floor of "treinta dias naturales" (30 calendar days) of paid leave, which cannot be bought out. On a Monday-to-Friday week a 30 consecutive calendar-day block contains 22 weekdays (4 full weeks = 20, plus 2 days), so the statutory minimum converts to 22 working days. That is also the harmonised five-day-week figure Eurofound publishes for Spain. The 22 days EXCLUDE public holidays, which are governed separately by art. 37.2 and capped at 14 paid, non-recoverable days per year (2 of them local).
Why the contracted week is not the legal maximum
This page divides by a 38.4-hour week, the typical full-time contract in Spain, not by the 40-hour statutory figure. That larger number is a legal ceiling on how much someone may be asked to work, not a description of what a full-time employee is contracted for, and using it as capacity would understate the headcount a post needs.
The holiday count is a floor
Most public holidays in Spain are set regionally rather than nationally, so this page counts only the 7 days observed across the whole country. A specific region will observe more, which pushes the relief factor up. The public holiday calendar for Spain lists the regional days.
What these figures cannot be used for
Not a ranking. The sickness figure here comes from a national statistical source, while other countries in this library use the OECD labour force survey. Those systems define absence differently, and self-reported survey figures undercount short spells that administrative records capture. Each number is the best available answer for planning inside its own country, and the gap between any two of them is partly a gap between statistical methods rather than between workforces.
A relief factor also says nothing about whether a roster is legal or humane. It sets how many people the post needs across a year; it does not check rest periods between shifts, consecutive nights, or weekend distribution. Those constraints decide whether the pattern you build on top of this headcount is one anybody can actually work.
Research notes on Spain
UNIT TRAP (the Spain-specific error you flagged): the "30 days" figure quoted everywhere is 30 calendar days, not 30 working days. A planner who enters 30 into a leave field overstates entitlement by roughly 8 working days (six weeks instead of just over four). Conversely, some sources quote "22 days" and then also add 14 public holidays into the same field; the 22 and the 14 are separate entitlements and should stay separate. Both are floors, not averages: many collective agreements grant slightly more than 30 calendar days, and some express it directly as 23-25 working days.
STATUTORY HOURS: 40 h/week is a maximum "de promedio en computo anual" (annual average of effective work), not a hard weekly cap. Firms can distribute hours irregularly (10% of annual hours without agreement, more by convenio), so an individual week can legally exceed 40. Separate daily cap: 9 ordinary hours per day unless a convenio says otherwise, and 12 hours minimum rest between shifts. The 2025 government bill to cut the statutory week to 37.5 h was rejected by Congress on 10 September 2025 and is not law; the BOE consolidated text of art. 34 still carries its original 2015 wording, with the last consolidation of the Estatuto dated 4 December 2025. If that bill is revived, this field changes to 37.5.
COLLECTIVE WEEK: three official sources bracket 38.4-38.7 and I used the low, directly-stated end. (a) Eurofound states 38.4 h as Spain's average collectively agreed normal weekly hours for full-time workers (2022). (b) Ministry of Labour collective agreement statistics (June 2026 advance) give the distribution of covered workers by agreed weekly band: 15.0% under 37.5 h, 40.4% at 37.5-38.5 h, 38.2% at 38.5-39.5 h, 2.9% at 39.5-40 h, 3.6% above 40 h; taking band midpoints (and assuming 37.0 and 40.5 for the open-ended bands) that weights to 38.4 h. The equivalent November 2025 distribution weights to 38.6 h. (c) INE's quarterly labour cost survey puts contracted hours for full-time employees at 168.4 h per worker per month through 2025, which is 2,020.5 h/year and 38.7 h/week over 52.18 weeks. Only about 3.6% of covered workers are on agreements above 40 h, so the practical full-time week is genuinely below the statutory ceiling.
SICKNESS, SHOWING THE WORKING: INE's Encuesta Trimestral de Coste Laboral publishes hours lost, not days. For full-time employees, hours not worked due to temporary incapacity (incapacidad temporal) per worker per month in 2025 were 9.2 / 9.2 / 8.7 / 9.2 across Q1-Q4, a mean of 9.075 h/month, so 108.9 h/year. That is 5.4% of the 168.4 contracted hours. Dividing by a contracted day of 7.68 h (38.4 / 5) gives 14.2 days; dividing by the 7.74 h/day implied by INE's own contracted hours over 261 weekdays gives 14.1 days; on a flat 8 h day it is 13.6 days. I report 14.1. The same calculation on all employees including part-timers (99.0 h/year over a 6.96 h day) also gives 14.2, so the figure is robust to that choice.
SICKNESS CAVEATS: (1) "Incapacidad temporal" covers both common illness and occupational accident/illness; maternity, paternity and personal leave are counted separately and are NOT in this number. (2) It is a mean, and Spanish absence is concentrated in long spells (average spell around 6 weeks), so the median worker loses far fewer days than 14 - do not treat 14 as a typical individual's absence. (3) ETCL excludes agriculture, domestic employment and extraterritorial bodies. (4) One internal inconsistency worth knowing: at the same day length, ETCL implies only about 25 days per year of vacation-plus-public-holiday time per full-time worker, below the 22 + up to 14 statutory maximum, probably because of mid-year turnover and holidays falling at weekends. That suggests the hours-to-days conversion could be off by up to roughly 10%, so treat the sickness figure as 13-15 days rather than a precise 14.1. (5) Spanish absence has risen sharply and is at record levels, so a figure more than two or three years old will understate it.
Sources
Every figure above except the training allowance was checked against one of these.
Statutory maximum ordinary working week: 40 hours of effective work, averaged over the year (art. 34.1); daily ordinary maximum 9 hours (art. 34.3)
Statutory minimum paid annual leave: 30 dias naturales (calendar days), not replaceable by payment (art. 38.1)
Public holidays capped at 14 per year, paid and non-recoverable, 2 of them local - separate from annual leave (art. 37.2)
Government summary confirming: maximum 40 hours effective work (weekly average over one year), 14 public holidays per year, minimum annual paid holiday of 30 calendar days
Statutory minimum paid annual leave for Spain = 22 days, expressed in days and harmonised on a five-day working week, and stated as being beyond national public holidays
Eurofound (EU agency) - research report 'Working time in 2021-2022', section on paid annual leave2022
Average collectively agreed normal weekly working hours for full-time workers, Spain = 38.4 (Figure 2; EU27 average 38.1)
Eurofound (EU agency) - research report 'Working time in 2021-2022'2022
Distribution of workers covered by collective agreements by agreed weekly hours: 15.00% under 37.5 h, 40.39% 37.5-38.5 h, 38.18% 38.5-39.5 h, 2.88% 39.5-40 h, 3.55% over 40 h (weights to about 38.4 h/week)
Same distribution one period earlier: 12.19% under 37.5 h, 28.55% 37.5-38.5 h, 52.03% 38.5-39.5 h, 3.61% 39.5-40 h, 3.62% over 40 h (weights to about 38.6 h/week)
Contracted (pactadas) hours for full-time employees: 168.4 hours per worker per month across 2025 = 2,020.5 h/year = 38.7 h/week; and hours not worked due to temporary incapacity (IT): 9.2, 9.2, 8.7, 9.2 hours per worker per month in Q1-Q4 2025 (mean 9.075, i.e. 108.9 h/year, 5.4% of contracted hours)
Definitions used for the conversion: 'jornada pactada' = hours legally agreed by verbal agreement, individual contract or collective agreement; 'horas no trabajadas' explicitly includes 'vacaciones y fiestas disfrutadas en el mes' and 'dias de baja por incapacidad temporal'
Instituto Nacional de Estadistica (INE) - Encuesta Trimestral de Coste Laboral, methodology2025
Common questions
- How many people does one 24/7 position need in Spain?
- 6 people. One position staffed every hour of the year is 8,766 hours, and one full-time employee in Spain is actually available for about 1,650 of them once 46.1 days of holidays, leave, sickness and training come out. That is a relief factor of 5.31, which rounds up to 6 whole people.
- What is a relief factor?
- The number of employees needed to keep one position filled continuously, once the days nobody works are taken out. It is coverage hours divided by the hours one employee is genuinely available. In Spain that is 8,766 divided by 1,650, or 5.31. A factor below the headcount you actually employ means the post runs on overtime.
- Why is a flat 25 percent absence buffer not enough for Spain?
- Because it overshoots here. A raw hours calculation gives 4.37 employees, and adding a flat quarter takes that to 5.47, against a derived answer of 5.31. That is 2.9 percent too high, because the rule of thumb assumes more leave and sickness than Spain actually loses.
- Does the statutory leave minimum reflect what employers actually give in Spain?
- It is a floor, not a norm. This page computes on the statutory minimum of 22 working days because that is the figure the law fixes and a source can be attached to. Most employers sit above it, and the sensitivity table on this page shows what the relief factor becomes at more generous entitlements, so a planner can find their own contract rather than taking the floor as the answer.
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