2026 / 27 Tax Year
IR35 Take-Home Calculator
for Interim CTO / Technology Directors
Interim CTOs and technology directors are engaged on strategic transformation mandates — typically outside IR35 given the advisory, project-based nature of the role. At senior day rates, tax optimisation can be worth tens of thousands annually. Model your 2026/27 take-home here.
Outside IR35
Limited Company
£0
£0/day effective
Contract income£0
Corp tax-£0
Dividend tax-£0
Income tax-£0
Empl. NI-£0
Net take-home£0
Effective rate0%
Inside IR35
Umbrella Company
£0
£0/day effective
Contract income£0
Employer NI (15%)-£0
Income tax-£0
Employee NI-£0
Net take-home£0
Effective rate0%
A specialist interim cto / technology director accountant typically saves far more than they cost. Compare contractor accountants and IR35 insurance.
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2026/27 rates. Personal allowance £12,570. Basic rate 20% to £50,270, higher rate 40% to £125,140. Employee NI 8%/2%. Employer NI 15% above £5,000. Corp tax 19%/25% with marginal relief. Dividend allowance £500, dividend rates 8.75%/33.75%/39.35%. Estimates only — not tax advice. Consult a qualified contractor accountant.