For both

Contract versus permanent.

Total cost or total income over a period, with the crossover point.

Total cost over 12 months, network deployment engineer, London

£96,900

Contract at £510 a day, 190 billable days

£88,450

Permanent at £72,500 plus 22% on-costs

Crossover, 173 days

100 days260 daysYours, 190

Contract costs less until about 173 billable days a year. Above that, permanent is cheaper.

Midpoints of the indicative ranges. Change the billable days to see the crossover move. Illustrative rate table v0.1, September 2026.

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