UK Contractor Resources

IR35, Tax Optimisation, and Real Contractor Stories

Navigate IR35, optimise your tax position, and understand your rights as a UK contractor. Calculate your true take-home pay and make informed decisions.

Take Home Calculator

Calculate your take-home pay as a contractor in the UK, comparing different working modes.

Mode:

Allowable business expenses (contractors only)

Gross Annual Salary

£115,000

PAYE Employment

Monthly Gross

£9,583

Monthly Net

£6,312

Deductions

£3,271

£75,749 annually

Annual Breakdown:

Tax:£33,432 (29.1%)
NI:£5,819 (5.1%)
Total deductions:£39,251 (34.1%)

Contractor (Outside IR35)

Monthly Gross

£9,583

Monthly Net

£6,371

Deductions

£3,212

£76,452 annually

Annual Breakdown:

Corporation Tax:£20,486 (17.8%)
Dividend Tax:£18,062 (15.7%)
Salary:£12,570
Dividends:£81,944
Total deductions (incl. expenses):£38,548 (33.5%)

Contractor (Inside IR35)

Monthly Gross

£9,583

Monthly Net

£5,323

Deductions

£4,260

£63,877 annually

Annual Breakdown:

Umbrella Fee:£20,470 (17.8%)
Tax:£25,244 (22.0%)
NI:£5,409 (4.7%)
Total deductions:£51,123 (44.5%)

Difference vs PAYE (Per Year)

Outside IR35

£702

Inside IR35

-£11,873

Want to compare contracting with PAYE employment side-by-side? Try our PAYE vs Contract Calculator →

Quick Reference Examples

See how contracting compares to PAYE at key UK tax thresholds

Basic Rate Example

Within the Basic Rate tax band (20%)

Day Rate

£150

Annual Gross

£35,000

PAYE:£27,000
Outside IR35:£29,800
Inside IR35:£26,000

Savings vs PAYE

Outside IR35:£2,800
Inside IR35:-£1,000

Higher Rate Example

Entering the higher rate tax band (40%)

Day Rate

£500

Annual Gross

£115,000

PAYE:£78,600
Outside IR35:£88,900
Inside IR35:£75,500

Savings vs PAYE

Outside IR35:£10,300
Inside IR35:-£3,100

Additional Rate Example

Well into higher rate, approaching additional rate

Day Rate

£700

Annual Gross

£161,000

PAYE:£101,400
Outside IR35:£117,800
Inside IR35:£97,300

Savings vs PAYE

Outside IR35:£16,400
Inside IR35:-£4,100

Why Inside IR35 Can Be Worse Than PAYE

Many contractors are surprised to find that working inside IR35—especially through an umbrella company—can actually leave them worse off than a permanent PAYE employee on the same gross pay. This is because umbrella workers pay both employee and employer National Insurance, umbrella fees, and lose access to most tax-efficient expenses and allowances. As a result, contractors should target higher contract rates than they would for equivalent PAYE roles to maintain their take-home pay.

  • Umbrella fees: Typically 4–5% of gross pay, deducted before tax
  • Employer NI: Deducted from your contract rate, unlike PAYE where the employer pays it
  • Limited expenses: Most business expenses are not claimable inside IR35

Why Outside IR35 Still Offers Tax Advantages

Contractors working outside IR35 through their own limited company can still benefit from several tax advantages:

  • Dividends: Profits can be taken as dividends, taxed at lower rates than salary
  • Corporation tax: Company profits are taxed at 20%, often lower than higher-rate income tax
  • Business expenses: Legitimate expenses (equipment, training, travel) are fully deductible
  • Pension contributions: Company can pay directly into your pension, reducing taxable profits
  • Spreading income: Flexibility to manage salary/dividend mix and timing

These advantages mean that, even at the same gross rate, outside IR35 roles can deliver significantly higher take-home pay than both inside IR35 and PAYE employment.

Make Informed Contracting Decisions

Use our tools and resources to understand your true take-home pay and navigate the complexities of UK contracting.