IR35 status decides your best route
IT contractors have one of the most pension-friendly working arrangements in the country — but only if you structure it correctly, and that depends on your IR35 status. The right approach for a contractor outside IR35 running a personal service company is completely different from one inside IR35 or working through an umbrella.
Outside IR35: pay from your limited company
If you operate outside IR35 through your own limited company, the most tax-efficient pension contribution is an employer contribution made directly by the company. The benefits stack up:
- It is an allowable business expense, reducing your corporation tax bill.
- It incurs no National Insurance, unlike salary.
- It is not restricted by your (typically low) salary — only by the £60,000 annual allowance plus carry forward.
- It moves company profit into a tax-sheltered pension instead of being drawn as dividends.
Inside IR35 and umbrella contractors
If you are caught by IR35 or work through an umbrella company, you are effectively treated as an employee. The most efficient option is usually salary sacrifice into the umbrella's workplace pension, which reduces your taxable income before deductions and saves National Insurance. Not every umbrella offers genuine salary sacrifice, so check — otherwise fund a personal SIPP from net pay and claim higher-rate relief through self-assessment.
| Provider | Fee (2026) | Best for |
|---|---|---|
| AJ Bell SIPP | 0.25% | Limited company employer contributions |
| Vanguard SIPP | 0.15% (cap £375) | Low-cost index investing |
| Interactive Investor | £12.99/month flat | Large contractor pots |
| PensionBee | 0.50–0.95% | Simple app, consolidating old workplace pots |
Don't forget the basics
- Contracting income is irregular — carry forward lets you make a big contribution in a strong year.
- Keep a salary at least at the National Insurance lower earnings limit to protect State Pension qualifying years.
- The annual allowance is £60,000 for 2026/27.
Why contractors should not skip the pension
IT contractors often earn well above the average salary but save inconsistently, lulled by good day rates into assuming retirement will sort itself out. The reality is that contracting income can be interrupted by gaps between contracts, IR35 reforms, and economic cycles, so building a robust pension during the good years is essential. A pension also offers a rare tax-planning advantage available to contractors: by moving company profit into a pension you reduce the cash sitting in the business (which matters for things like the associated company rules and potential future tax changes) while securing genuinely tax-advantaged retirement savings. Treat pension contributions as a non-negotiable line in your annual company budget, not an afterthought.
Consolidating old workplace pensions
Most IT contractors spent time as permanent employees before going independent, leaving a trail of old workplace pensions from previous jobs. Consolidating these into a single SIPP makes them easier to track, can reduce fees, and lets you control the investment strategy in one place. Before transferring, check each old pot for exit penalties or valuable guarantees such as guaranteed annuity rates, and never transfer a defined benefit pension without regulated advice. Platforms like PensionBee specialise in painless consolidation, while AJ Bell and Vanguard let you combine consolidation with ongoing employer contributions from your company.
Verdict
The best pension for an IT contractor outside IR35 is unambiguous: employer contributions from your limited company into a low-cost SIPP, saving corporation tax and National Insurance. AJ Bell and Vanguard are the standout homes for that money, with Interactive Investor best for large pots. Inside-IR35 and umbrella contractors should use salary sacrifice where available and otherwise fund a personal SIPP and reclaim higher-rate relief.
Related reading: best pension for contractors, employer pension contributions for limited companies, and best pension for directors.