Salary, Dividend or SIPP? The Optimal Contractor Extraction Mix for 2026/27

For most outside IR35 contractors, the optimal shape is a £12,570 salary (matching the personal allowance, so no Income Tax or employee NI applies), then a split between dividends and an employer SIPP contribution decided by how soon you need the cash. At a £600/day rate over 220 days (£132,000 revenue), maximising dividends alone nets £79,613 a year in cash. Routing the maximum £60,000 into a SIPP instead drops cash take-home to £51,279 but adds £60,000 to a pension pot, for £111,279 in total wealth, £31,666 more than the dividend-only route.

Because a SIPP contribution never gets taxed as personal income at all, it bypasses Corporation Tax and Dividend Tax entirely and goes straight into your pension, whereas company profit paid out as dividends is taxed twice: once by Corporation Tax (19% to 25%) and again by Dividend Tax (10.75% to 39.35%) when it reaches you personally. At a £600/day rate, every £1 of profit routed to dividends nets roughly 60p in your pocket after both taxes. The same £1 routed to a SIPP arrives as a full £1 in your pension. The trade-off is access: pension money is locked until age 57, dividends are cash today.

At £600/day over 220 days, the best outside IR35 route (maximised dividends, no SIPP) nets £79,613 a year in cash, versus £73,142 inside IR35 through an umbrella company, a difference of £6,471. The gap widens further once a SIPP is added to the outside IR35 route, because inside IR35 has no equivalent employer pension mechanism: the whole deemed salary is taxed as PAYE income before you see any of it.

It depends entirely on your living costs and time horizon, not a fixed rule. A common approach among established contractors is to work out the cash you actually need this year for mortgage, bills, and lifestyle, take exactly that much as dividends, and route everything above it into a SIPP. A contractor at £600/day who needs £65,000 a year to live on, for example, could take roughly £65,000 in dividends and direct the remaining profit into a SIPP rather than choosing an all-or-nothing extreme.

£12,570 remains the optimal salary in almost every scenario, whether or not you are also maximising SIPP contributions. This is because the salary itself is unaffected by your SIPP decision, it is a separate, employer-side company contribution paid on top of whatever salary and dividends you choose. Some contractors consider a lower salary to eliminate Employer NI entirely, but this forfeits personal allowance you would otherwise use tax-free, so £12,570 remains correct for the vast majority of cases.

Because SIPP contributions are removed from company profit before Corporation Tax is even calculated, and never pass through Dividend Tax at all. At £600/day, the dividend-only route loses 39.7% of contract revenue to tax and NI combined; the SIPP-maximised route loses only 15.7%. That is not a loophole, it is the deliberate design of pension tax relief, intended to encourage retirement saving, and it is the single largest lever available to a UK contractor for reducing their effective tax rate.

Between £100,000 and £125,140 of combined salary and dividend income, you lose £1 of personal allowance for every £2 earned, creating an effective 60% marginal rate on that slice. Increasing your employer SIPP contribution reduces your adjusted net income and can pull you back below £100,000, restoring the full personal allowance on the rest of your income. This is one of the clearest cases where a SIPP contribution does double duty: it grows your pension and protects income that would otherwise be taxed at 60%.

Only if your total income, salary plus dividends, stays below the £50,270 higher rate threshold, and your spouse earns below the £12,570 personal allowance with unused allowance to transfer. Above roughly £180/day at 220 billable days, most contractors' dividend income alone pushes total income past that threshold, disqualifying the claim. It is worth checking each year rather than assuming it applies, since the eligibility boundary is easy to cross without noticing.

The standard annual allowance is £60,000 for 2026/27, and you can carry forward unused allowance from the three previous tax years if you were a member of a pension scheme during those years. If your adjusted income exceeds £260,000, a tapered allowance applies, reducing your limit by £1 for every £2 of income above that threshold, down to a floor of £10,000. Contributing beyond your effective allowance triggers an annual allowance charge at your marginal tax rate on the excess.