£80,000
20%
3 months
12 months
£600 / day
Permanent senior hire
First-year fully-loaded cost
£110,400
Recruiter fee
£16,000
Salary, productive months
£60,000
Salary, ramp months
£20,000
Employer overhead (18%)
£14,400
CoderCo deployment
Billed for 12 months
£144,000
Day rate × 20 days × months billed
£144,000
First-year additional cost
£33,600

Going CoderCo costs more at current inputs. Drop the day rate or extend the deployment to compare like-for-like. Numbers are order-of-magnitude only. The model excludes pass-through costs like equipment, employer NI and benefits variance, so the real delta on a signed engagement will move from this baseline.