Summary

Choosing between an AVC and a Self-Invested Personal Pension (SIPP) is a common question for UK savers who want to top up retirement provision. Both are registered pension arrangements and both receive tax relief, but they differ in structure, charges, Investment choice and how they interact with workplace benefits.

AVCs are run within a workplace scheme and are usually cheaper, with limited investment menus and the possibility of generous lump-sum rules in defined benefit schemes such as the LGPS. SIPPs are personal pensions with broad investment freedom but typically higher charges and no employer link.

The right choice depends on individual tax position, scheme rules, investment preferences, charges and timeline to retirement. This article compares the two for the 2025/26 tax year using the Annual Allowance of 60,000 pounds and the Lump Sum Allowance of 268,275 pounds.

This article is informational only and not financial advice.

Key Takeaways

• AVCs sit inside your workplace pension scheme; SIPPs are personal pension contracts in your own name.
• Both attract income tax relief up to the 60,000-pound Annual Allowance for most savers in 2025/26.
• AVCs often have lower charges; SIPPs typically offer much wider investment choice.
• In LGPS and some other DB schemes, AVCs can support a larger tax-free lump sum.
• SIPPs offer full flexi-access drawdown; AVCs may need to be transferred to access drawdown.
• Salary sacrifice AVCs can save National Insurance as well as income tax.
• Both are subject to the Money Purchase Annual Allowance (10,000 pounds) once flexibly accessed.

AVC vs SIPP: Which Is Better for Extra Retirement Contributions?

For UK employees who want to save more for retirement than their default workplace contribution, two Options dominate the conversation: paying Additional Voluntary Contributions (AVCs) into their existing occupational scheme, or opening a Self-Invested Personal Pension (SIPP) with a retail provider. Both are recognised pension arrangements under the Finance Act 2004, both receive HMRC tax relief, and both can be used to build a defined contribution pot alongside a main scheme.

The two products are often presented as alternatives, but they are not identical. AVCs are bolted on to a workplace scheme run by an employer or sponsoring body; SIPPs are personal contracts held with platforms such as AJ Bell, Hargreaves Lansdown, Vanguard, interactive investor and others, regulated by the Financial Conduct Authority (FCA).

This article compares the two for the 2025/26 tax year, looking at how each is funded, the tax relief mechanism, charges, investment menus, how they interact with defined benefit benefits - particularly in the LGPS, NHS and Teachers' Pensions - and how the rules for access at retirement differ in practice. The aim is to give readers a balanced framework, not a recommendation.

What an AVC and a SIPP each are in law

An AVC is an arrangement made under the rules of an occupational pension scheme - almost always a registered scheme under Part 4 of the Finance Act 2004. The trustees or administering authority choose a provider (typically Prudential, Standard Life, Scottish Widows or Legal &Amp; General) and a default investment strategy, and members pay extra contributions through Payroll.

A SIPP is a type of personal pension. Unlike a workplace pension, it is a direct contract between the individual and the SIPP provider. SIPPs offer a wide range of permitted investments - listed shares, Exchange-traded funds (ETFs), unit trusts, OEICs, investment trusts, commercial property and cash deposits - chosen by the saver, usually through an online platform.

Both are registered pension schemes for HMRC purposes, so both qualify for tax relief and both count towards the Annual Allowance. The key legal distinction is that an AVC is part of the employer's occupational scheme governance, while a SIPP is a personal product chosen and managed by the individual.

Tax relief and contribution rules

AVCs in most public sector schemes use the net pay arrangement: contributions are deducted from gross pay before income tax is calculated, giving relief at the saver's marginal rate automatically. Salary sacrifice AVC arrangements - known as Shared Cost AVCs in the LGPS - also save Class 1 employee National Insurance, currently 8% in 2025/26 on Earnings above the primary threshold.

SIPPs use the relief-at-source method. The saver pays in net of basic-rate tax and the provider claims 20% from HMRC, grossing up the contribution. Higher-rate (40%) and additional-rate (45%) taxpayers in England, Wales and Northern Ireland reclaim the difference through Self Assessment. Scottish income tax bands give slightly different relief.

Both routes are subject to the same headline limits. Personal contributions are capped at 100% of UK relevant earnings or 3,600 pounds gross, whichever is greater. Total pension input across all schemes is tested against the 60,000-pound Annual Allowance (or a tapered figure for those with adjusted income above 260,000 pounds).

Charges, investment choice and provider model

AVC charges in public sector schemes are typically lower than retail SIPP charges because the scheme negotiates institutional rates. Total annual costs of 0.30% to 0.65% on lifestyle and self-select funds are common, with no platform fee and no dealing charge.

SIPP charges vary widely. Fund-supermarket SIPPs may charge a platform fee of around 0.25% to 0.45% a year on funds, plus the underlying fund OCFs. Share dealing SIPPs may charge a flat annual fee plus per-trade commissions. Investment choice is much wider, including individual UK and overseas shares, ETFs, bonds and (in some SIPPs) commercial property.

Investment menus also differ. A typical AVC offers a default lifestyle strategy plus 10 to 20 funds across the main asset classes, including ethical/ESG options. A full SIPP can access thousands of funds and tens of thousands of equities and ETFs. This is an advantage for engaged investors, but adds complexity and the risk of poor self-selection.

Interaction with defined benefit benefits

For members of defined benefit schemes - LGPS, NHS, Teachers' Pensions, Civil Service Alpha - the AVC route has a specific structural advantage. The AVC pot can be used to maximise the tax-free cash lump sum at retirement, often without giving up any annual DB pension through commutation.

In the LGPS, for example, a member can take up to 100% of the AVC pot as tax-free cash provided the total tax-free cash across the scheme is within 25% of the combined value of DB benefits and AVC pot, and within the Lump Sum Allowance of 268,275 pounds. NHS Money Purchase AVCs and Teachers' AVCs via Prudential offer similar - though scheme-specific - lump sum options.

A SIPP cannot directly enhance the tax-free cash on a separate DB pension; the 25% on a SIPP only applies to the SIPP itself. For savers focused on maximising tax-free cash from a DB scheme, AVCs are usually the more efficient option. For those wanting maximum drawdown flexibility, a SIPP may be preferred.

Access flexibility at retirement

SIPPs have full pension freedoms. From the Normal Minimum Pension Age (55 in 2025/26, rising to 57 from 6 April 2028), a saver can take 25% tax-free, draw the rest through flexi-access drawdown or uncrystallised funds pension lump sums (UFPLS), or buy an Annuity. Income drawdown is a standard feature of every retail SIPP.

AVC retirement options are scheme-specific. Many AVC arrangements still default to either taking tax-free cash plus an annuity, or transferring the residual pot to a personal pension to access drawdown. Increasingly, in-scheme drawdown is becoming available, but it is not universal.

Both AVCs and SIPPs are subject to the Money Purchase Annual Allowance (MPAA) of 10,000 pounds once flexibly accessed. Taking more than 25% from either pot will trigger the MPAA and limit further DC contributions, which is an important consideration for savers who plan to continue working and contributing.

Choosing between an AVC and a SIPP - a structured comparison

The choice usually comes down to four factors: cost, investment preference, employer link and the role of any defined benefit pension. None of these factors makes one product universally better, and many savers ultimately hold both - an AVC for the workplace tax-free cash benefits, and a SIPP for additional invested funds and flexible access.

A reasonable starting framework is to look first at the workplace AVC: charges, fund choice, salary sacrifice availability and the scheme's lump-sum rules. If those are competitive and the DB scheme is generous, the AVC is often the more efficient first port of call. A SIPP can then be considered for additional savings, broader investments or post-employment contributions.

Salary sacrifice availability is a particular tilt towards AVCs because it saves National Insurance, which a SIPP cannot. Conversely, savers who frequently move employer may find a SIPP more portable. As always, MoneyHelper, Pension Wise (from age 50) or an FCA-authorised adviser can help structure the decision.