Spouse Dividend Splitting (S660A) Calculator
See how much tax a couple could save by splitting company dividends between spouses, with an Arctic Systems / S660A compliance checklist.
The UK has no statutory fixed split percentage — S660A/ITTOIA 2007 settlements legislation is case-law driven. Following Jones v Garnett ('Arctic Systems', House of Lords, 2007), an outright gift of ordinary shares carrying full rights (dividend, capital, voting) between spouses/civil partners is NOT caught as a 'settlement', however unequal the split, provided it is a genuine outright gift and not just a right to income. maxSharePct: 0.5 here is a placeholder representing the common equal (50/50) shareholding used in practice for a two-director contractor company — NOT a legal cap; a couple can in principle allocate any share ratio via genuine share ownership. HMRC's settlements manual and the 2007-2008 'Family Business Tax' consultation attempted a statutory fix that was dropped after Arctic Systems, so no numeric limit was ever legislated.
Splitting dividends with your spouse: what Arctic Systems actually allows
Many contractor couples ask whether they can pay dividends to a spouse or civil partner who owns shares in the company but does little or none of the client-facing work. The starting point in law is the settlements legislation in Chapter 5, Part 5 of ITTOIA 2007 — often referred to by its old name, S660A — which can tax the settlor (usually the working spouse) on income that's been diverted to someone else through an arrangement. The landmark case is Jones v Garnett, universally known as 'Arctic Systems', decided by the House of Lords in 2007: it held that an outright gift of ordinary shares carrying full rights — to dividends, capital and voting — between spouses or civil partners is not caught by the settlements legislation, however unequal the resulting split, provided it really is an outright gift and not merely a right to income dressed up as one.
There is no statutory percentage cap on how dividends can be split — HMRC and the 2007–08 'Family Business Tax' consultation both looked at introducing one after Arctic Systems and neither went ahead, so the position remains case-law driven rather than a fixed formula. This calculator is one of the only interactive tools covering this topic at all: the existing coverage online is almost entirely law-firm and accountancy articles explaining the case, with no way to see what a given split would actually save a specific couple. Enter your company's profit and both spouses' other income, and it shows the tax saved at different share splits alongside a compliance checklist based on the Arctic Systems principles.
The Arctic Systems compliance checklist
- The shares must be an outright gift, not simply an assignment of a right to income — legal and beneficial ownership should genuinely transfer
- The shares should be ordinary shares carrying full rights: to dividends, to capital on a winding-up, and to vote — not a special class created only to divert income
- The receiving spouse or civil partner should hold the shares in their own right, with the dividend paid to them directly, not merely routed through them
- The arrangement should reflect a genuine business and personal relationship (marriage or civil partnership) rather than an artificial income-splitting scheme with no other commercial rationale
- Keep records of when and how the shares were issued or transferred, since HMRC's settlements manual guidance (TSEM4205) still expects the 'outright gift' test to be evidenced if ever queried
