IR35 CALCULATOR
FOR MECHANICAL ENGINEERS.
Contract mechanical engineers work across oil and gas, automotive, aerospace, and manufacturing. Independent project work with defined scopes frequently supports outside IR35. All figures use confirmed 2026/27 HMRC rates.
Outside IR35 · Ltd Company
LTD COMPANY
£0
£0/day effective
Contract income£0
Corp tax-£0
Dividend tax-£0
Income tax-£0
Employee NI-£0
Net take-home£0
Effective rate0%
Inside IR35 · Umbrella
UMBRELLA
£0
£0/day effective
Contract income£0
Employer NI (15%)-£0
Income tax-£0
Employee NI-£0
Net take-home£0
Effective rate0%
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Specialist mechanical engineer accountants typically save far more than they cost. Compare options and get IR35 insurance.
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.