Building a Tax-Efficient Income in Retirement

The transition from accumulating wealth to drawing it down is one of the most consequential shifts in a person's financial life. During accumulation, the decisions are largely about how much to save, how to invest, and how to shelter returns from tax. In retirement, the decisions multiply: which pot to draw from first, in what amount, in which tax year, and in what legal form.

Getting these decisions wrong is expensive. For someone drawing income from multiple sources — pension, ISA, property, offshore bond, savings — the difference between a planned and unplanned approach can easily be £10,000-£30,000 per year in unnecessary tax. Over a 25-year retirement, that is a very large number.

The Income Sources and Their Tax Treatment

Understanding how each income source is taxed is the starting point.

State pension: Fully taxable as earned income. In 2026/27, the full new State Pension is £241.30 per week — approximately £12,548/year, which is only marginally below the frozen personal allowance of £12,570 (by approximately £22 for those at the precise full rate, though individual entitlements vary). This means the State Pension almost entirely consumes the personal allowance, leaving very little headroom for other income before tax begins.

Occupational pension (defined benefit): Taxable as earned income. A defined benefit pension of £30,000/year added to a full State Pension gives total taxable income of approximately £42,500 — well into the basic rate band.

Personal pension / SIPP drawdown: Taxable as earned income when withdrawn. The pension pot itself grows free of income tax and CGT inside the wrapper.

ISA withdrawals: Completely tax-free. ISA withdrawals do not appear on a self-assessment return. They do not affect your taxable income for any purpose — not for personal allowance taper, not for tax credit calculations, not for age-related allowance thresholds. This is the purest form of tax-free income.

Offshore bond — 5% withdrawals: Not immediately taxable. The 5% annual withdrawal allowance represents a tax-deferred drawdown from the bond's original premium. These withdrawals do not appear as income on your tax return in the year they are taken. However, the gain is being accumulated and will be taxed when the bond is encashed (subject to top-slicing relief).

Property rental income: Taxable. Net rental income (after deductible expenses) is added to your other income and taxed at your marginal rate. It is not possible to shelter rental income in a tax wrapper in any straightforward sense.

Dividends from shares held outside an ISA: Taxable. The first £500 (2026/27) is covered by the dividend allowance. Above that, dividends are taxed at 8.75% (basic rate), 33.75% (higher rate), or 39.35% (additional rate).

The Personal Allowance Preservation Problem

The single most overlooked issue in retirement income planning is the personal allowance taper.

Every individual receives a personal allowance — £12,570 (frozen through 2027/28) — that shelters that amount of income from income tax. However, if your total adjusted net income exceeds £100,000, the personal allowance reduces by £1 for every £2 of income above that threshold. By £125,140, the personal allowance has been completely withdrawn.

The effect is a marginal rate of 60% on income between £100,000 and £125,140. A pension withdrawal that pushes you from £98,000 to £105,000 of taxable income results in £3,500 of lost personal allowance — worth £1,400 in extra income tax on top of the standard 40% higher rate tax.

This 60% trap should be the central planning constraint for anyone drawing pension income who might approach £100,000 in a given year. Strategies to avoid it:

• Make pension contributions to reduce adjusted net income below £100,000 (counterintuitive in retirement, but for those with earned income, it works).
• Draw from ISAs instead of pension in years where pension income would push you past the threshold — ISA withdrawals do not affect adjusted net income.
• Use offshore bond 5% withdrawals — these are also not "income" for personal allowance purposes when within the 5% limit.
• Time large pension withdrawals carefully — if you must take a large pension withdrawal, try to concentrate it in a low-income year.

The "Fill Up the Bands" Strategy

In years where your taxable income is below the basic or higher rate threshold, it is often tax-efficient to draw additional pension income — paying 0-20% tax on it now rather than potentially more later.

This is most relevant in the period between retiring and starting to draw the State Pension (since State Pension is not drawn from birth — most people defer it until they reach State Pension age, which is currently 66 and due to rise). This window may be only a few years, but it creates an opportunity.

Example: you retire at 62 with no State Pension yet and a modest occupational pension of £8,000/year. Your personal allowance is £12,570. You could draw an additional £20,000 from your SIPP each year, paying basic rate tax only on £15,430 (£8,000 + £20,000 - £12,570 personal allowance = £15,430 taxable). Tax at 20% = £3,086. The effective rate on the SIPP withdrawal is approximately 15%.

Compare that to drawing the same amount in later years when your State Pension (approximately £12,548 in 2026/27) plus occupational pension (£8,000) already exceed the personal allowance, and any SIPP withdrawal is fully taxed at 20–40%.

"Front-loading" pension drawdown in the pre-State-Pension years at lower effective rates is one of the most valuable strategies in retirement income planning.

Using the ISA as the Tax-Free Top-Up

ISA income is the cleanest source of retirement income. It creates no taxable income, does not affect personal allowance calculations, and does not affect tax credit or means-tested benefit assessments.

The optimal use of an ISA in retirement is as the flexible top-up that fills the gap between "base" taxable income (State Pension + occupational pension + a controlled amount of SIPP drawdown) and your desired total spending. By setting base income carefully — perhaps at £90,000 if you want to stay safely below the £100,000 personal allowance threshold — and funding the rest from ISA withdrawals, you can have a comfortable total income without the 60% marginal rate kicking in.

This strategy requires having a meaningful ISA pot at retirement — which is why maximising ISA contributions during working years is valuable even for those with large pension pots.

The Offshore Bond in Retirement

For those who hold offshore bonds — often built up during years of higher-rate taxpaying or during a non-dom period — the 5% annual withdrawal provides a useful tax-deferred income stream in retirement.

If the bond is eventually encashed in a year when your income is low (perhaps because SIPP drawdown has slowed, or in a year after large pension income has been "used up"), the top-slicing calculation can significantly reduce the effective rate on the accumulated gain. In some cases, careful timing of encashment can result in most of the gain being taxed at basic rate or even zero rate.

For non-doms who held an offshore bond during their UK residence, the interaction with the old remittance basis (or the new FIG regime) adds additional complexity. The timing of encashment and the location of residence at the point of encashment can both affect the tax outcome significantly.

Property Rental in Retirement: The Tax Drag

Property rental income cannot easily be managed for tax efficiency once it is flowing. Unlike pension or bond income, where timing is controllable, a rental property generates income whether you want it or not.

For those with significant rental portfolios entering retirement with already high total income, the cumulative effect of rental income on the personal allowance taper, higher rate exposure, and pension allowance can be significant. Options to address this — selling property, establishing a family partnership, or placing properties into a company — all have their own tax implications and must be planned carefully well in advance of retirement.

Getting the Sequence Right

The general principle for tax-efficient retirement income sequencing:

1. Draw State Pension — you cannot defer indefinitely, and deferral past State Pension age generates a higher ongoing State Pension.
2. Draw occupational/defined benefit pension — largely inflexible in timing.
3. Manage SIPP drawdown around your desired total taxable income ceiling — below £100,000 if preserving the personal allowance is a priority.
4. Draw ISA income to fund additional spending above the taxable ceiling.
5. Use offshore bond 5% withdrawals for further tax-deferred income.
6. Time full encashment of the bond for a low-income year when top-slicing relief maximises efficiency.

How Global Investments Can Help

Retirement income planning sits at the heart of what Global Investments does. The interactions between income sources, tax bands, personal allowance taper, and long-term capital requirements cannot be managed by looking at each source in isolation. We model clients' complete income picture across all sources and wrappers, identify the optimal drawdown sequence for their circumstances, and review the plan annually as tax rules, investment performance, and personal circumstances evolve. Speak to our advisers at least five years before your planned retirement date — the more lead time, the more options remain available.