Three Boxes, One Pension: Choosing Between SIPP, SSAS and the Offshore Bond Before It Costs You
Photo: Wilfredor, CC0, via Wikimedia Commons
There is a moment in almost every substantial retirement planning conversation when the client leans forward and asks the question: "Which wrapper should this actually sit in?" For savers with £500,000 or more earmarked for later life, the answer is rarely obvious — and the cost of getting it wrong compounds quietly for decades.
The three dominant structures — the Self-Invested Personal Pension (SIPP), the Small Self-Administered Scheme (SSAS) and the offshore investment bond — are frequently presented as rivals. In truth, they are tools built for different jobs. The difficulty is that the marketing of each tends to blur those distinctions.
The SIPP: The Default, and Why It Usually Deserves the Role
The SIPP remains the workhorse of UK retirement saving, and for good reason. Contributions attract relief at marginal rates, growth is free of UK tax within the wrapper, and from age 57 (rising in line with the state pension age for younger savers), 25% of the fund can typically be drawn tax-free.
For a company director or professional with substantial earned income, the maths is compelling. A higher-rate taxpayer contributing £40,000 gross effectively pays £24,000 for a £40,000 investment — an immediate 66% return before a penny of market growth.
Where the SIPP falters: it is fundamentally a personal vehicle. Borrowing is restricted to genuine commercial property, business assets cannot be held, and very large contributions can fall foul of the tapered annual allowance — a trap that catches senior executives earning above £200,000 with particular regularity.
The SSAS: The Business Owner's Instrument
A SSAS is technically a type of occupational pension scheme, but in practice it is something quite different: a family-controlled pension trust, usually established by company directors. Its distinctive powers are considerable.
A SSAS can lend funds back to the sponsoring employer (within HMRC limits — 75% of scheme assets, secured, for up to five years), can purchase the company's commercial premises and lease them back, and can invest in a far wider range of assets than most platforms permit. For a family business with a trading property need and a pension surplus — or vice versa — it can be uniquely efficient.
Consider the scenario: two director-shareholder spouses with a £600,000 combined SSAS and a company needing £300,000 for new premises. A SSAS loan achieves it, the interest is paid back into their own pension, and the property purchase can be structured so the rent flows into the family's retirement fund rather than a third-party landlord. No other wrapper permits this.
Where the SSAS goes wrong: administration is genuinely more involved, the regulatory obligations sit with the trustees (the members themselves), and it only makes sense where there is a sponsoring business. For a portfolio careerist or retiree, it is an expensive answer to a question they are not asking.
The Offshore Bond: Flexibility at a Price
The offshore investment bond is the most misunderstood of the three. It is not a pension: no contribution relief, no tax-free cash entitlement. Its advantages lie elsewhere.
Gross roll-up — growth compounds without UK tax friction — is genuinely valuable for long-horizon investors using international funds. Withdrawals are taxed under the highly flexible "5% rule," allowing staged encashment at times and rates chosen by the investor. And the estate planning dimension is real: bonds can be written in trust, and segmentation allows tailored benefits across generations.
The honest weakness: for a basic-rate taxpayer with no immediate need for withdrawal flexibility, an offshore bond is often the most expensive option on the table. Provider charges, and the taxation of gains as income rather than capital, erode the case. Where it shines is for the already-retired higher-rate taxpayer planning phased income, or the internationally mobile family anticipating a change of residence.
A Working Framework
Our own decision sequence is simple:
- Are you still earning substantially? Start with a SIPP — contribution relief is a government subsidy you should not decline.
- Do you run a business with property or funding needs? A SSAS deserves serious evaluation, ideally alongside the SIPP rather than instead of it.
- Are you drawing income flexibly, or planning across generations and jurisdictions? The offshore bond enters the conversation here — and only here.
For many £500,000-plus savers, the sophisticated answer is a combination: SIPP for ongoing contributions, SSAS where a business exists, and a bond as the flexible drawdown and estate-planning layer above.
The Frank Warning
None of these structures compensates for poor underlying investments, and all of them carry compliance obligations that are trivial when handled properly and expensive when ignored. The wrapper decision should follow the life plan — not the other way round. Taken in the right order, though, the chess match resolves itself: each piece moves to the square it was designed for.
