UK employers must auto-enrol eligible workers into a qualifying workplace pension scheme and contribute at least 3% of qualifying earnings, with a total minimum contribution of 8% (employer plus worker plus tax relief). NEST, The People's Pension, and Smart Pension are the three largest master trust providers and accept all employer sizes including those with one employee. Aviva, Standard Life, and Royal London offer contract-based group personal pensions used by larger employers or those with adviser relationships. The Pensions Regulator enforces compliance and can issue Compliance Notices, Unpaid Contributions Notices, and fines of up to £10,000 per day for persistent non-compliance.
Last reviewed May 2026
Workplace pension provision in the UK is shaped by the auto-enrolment regime introduced under the Pensions Act 2008, which requires every employer to enrol eligible workers into a qualifying pension scheme and make minimum contributions. The regime has transformed UK pension participation: over 10 million workers have been auto-enrolled since 2012, predominantly into master trust arrangements rather than the defined benefit schemes that dominated UK pension provision in earlier decades. For employers, the obligation is ongoing - it does not end with the initial enrolment of existing staff but continues with every new hire, every worker who meets the eligibility criteria for the first time (typically turning 22 or reaching the earnings threshold), and every three-year re-enrolment cycle. This guide explains the auto-enrolment obligations, how to evaluate and compare workplace pension providers, and the compliance requirements enforced by The Pensions Regulator.
Auto-Enrolment: The Compliance Obligations
The Pensions Regulator's auto-enrolment guidance defines three categories of worker. Eligible jobholders (aged 22-66, earning above the earnings trigger of £10,000 per year) must be automatically enrolled. Non-eligible jobholders (aged 16-21 or 66+, or earning between the lower earnings limit of £6,240 and £10,000) have the right to opt in, and if they do the employer must contribute. Entitled workers (earning below £6,240) can join but the employer has no contribution obligation.
The minimum contribution structure requires total contributions of at least 8% of qualifying earnings, with the employer contributing at least 3%. Qualifying earnings are defined as earnings between the lower earnings limit (£6,240 in 2025-26) and the upper earnings limit (£50,270). Some employers choose to use a different contribution basis - contributions on total earnings from the first pound, or contributions as a percentage of basic pay - provided the resulting contribution amount meets the qualifying earnings minimum test. Employers using an alternative contribution basis must conduct an alternative quality test or certification to confirm compliance with TPR requirements.
Contribution payment deadlines are a frequent source of TPR enforcement action. Employer and worker contributions must be paid to the pension provider by the 22nd of the month following the month in which the deduction was made (for electronic payment). Late payment is treated seriously by TPR even where the amounts are subsequently paid in full, as late contributions deprive workers of investment growth. Payroll and pension administration systems that automate the contribution calculation and payment submission reduce late payment risk but require correct configuration of the payment deadline in the first instance.
Master Trust vs Contract-Based Pension: Key Differences
UK workplace pensions fall into two structural categories: master trusts (where the pension scheme is governed by an independent trustee board, with multiple employers participating) and contract-based schemes (group personal pensions or group stakeholder pensions, where the pension contract is between the insurance company and the individual worker, and the employer facilitates but does not govern the arrangement).
Master trusts are regulated by The Pensions Regulator under the Occupational Pension Schemes (Master Trusts) Regulations 2018 and must be authorised by TPR. NEST, The People's Pension, and Smart Pension are authorised master trusts. The trustee board of a master trust has a fiduciary duty to act in the interests of members, providing a layer of governance that protects workers regardless of the employer's financial position. Master trusts are typically simpler to administer for employers because governance responsibility rests with the trustee board rather than the employer.
Contract-based schemes (Aviva, Standard Life, Royal London) are regulated by the FCA and governed by the provider's terms and conditions rather than a trust deed. Governance oversight is provided by an Independent Governance Committee (IGC) rather than a trustee board. Contract-based schemes are often used by larger employers or those with an employee benefits adviser relationship who want a more tailored investment strategy, a bespoke administration interface, or access to the provider's broader employee benefits and healthcare proposition.
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NEST (National Employment Savings Trust) was established by the government specifically to ensure universal employer access to auto-enrolment. It must accept any employer, including those with one employee or those with high-turnover or part-time workforces that commercial providers might decline. Its default fund (the NEST Retirement Date Fund) uses a lifestyling approach that de-risks as the member approaches retirement. Its administration interface integrates with most major UK payroll providers. It charges a 0.3% annual management charge and a 1.8% contribution charge on each payment, which is higher than some master trust alternatives for high earners but competitive for basic-rate taxpayers.
The People's Pension is the UK's second-largest master trust by membership. It charges a flat 0.5% annual management charge with no contribution charge, making it cost-competitive for employers with a mix of contribution sizes. Its payroll integration covers most major UK payroll platforms and it offers both online and bureau administration options. It is widely used by retail, hospitality, and construction employers with large numbers of part-time or variable-hours workers.
Smart Pension is a technology-led master trust with a strong focus on digital administration and open finance integration. Its Smart API enables payroll providers to integrate contribution submissions without the need for manual file uploads. It has grown rapidly in the SME market and among employers using modern payroll platforms such as Xero, Sage, and BrightPay.
Aviva, Standard Life, and Royal London are the three largest contract-based group pension providers in the UK. They offer more flexibility in investment strategy, employer branding of the pension portal, and integration with wider employee benefits propositions than most master trusts. They typically require a minimum employer size (usually 50-100 employees) or an adviser intermediary relationship to access their auto-enrolment solutions.
| Provider | Type | AMC | Min employer size | Best for |
|---|---|---|---|---|
| NEST | Master trust | 0.3% + 1.8% on contributions | None | Any employer, guaranteed access |
| The People's Pension | Master trust | 0.5% flat | None | Retail, hospitality, variable hours |
| Smart Pension | Master trust | 0.3%-0.75% (tiered) | None | Tech-forward payroll integration |
| Aviva | Contract-based GPP | Negotiated | 50+ (typically) | Mid-large, broader benefits |
| Royal London | Contract-based GPP | Negotiated | Adviser-led | Adviser-intermediated, mid-market |
TPR Enforcement and Common Compliance Failures
The Pensions Regulator has enforcement powers ranging from Compliance Notices (requiring the employer to comply with a specific obligation) through Unpaid Contributions Notices (requiring payment of outstanding contributions plus interest) to Fixed Penalty Notices (£400 fixed penalty) and Escalating Penalty Notices (£50 to £10,000 per day depending on employer size). Criminal prosecution is available for the most serious cases of deliberate non-compliance.
The most common compliance failures identified by TPR's enforcement activity are: failure to enrol new starters promptly at the point they become eligible; failure to pay contributions by the payment deadline; failure to re-enrol workers who opted out at the three-year re-enrolment date; and failure to re-declare compliance with TPR within five months of the re-enrolment date. TPR's online compliance tool provides employers with their re-enrolment and re-declaration dates based on their staging date.
Pension scam awareness is a related compliance concern. The FCA and TPR have published joint guidance on protecting pension savers from scams, including cold calling about pensions (which is illegal), transfer requests to unregulated vehicles, and promises of guaranteed returns. Employers and trustees who become aware of potential pension scam activity should report it to Action Fraud and to the FCA's ScamSmart service.
Investment Default Fund Selection and Value for Money
The investment default fund is the fund into which auto-enrolled workers are invested if they make no active investment choice - which the majority do not. The default fund therefore determines the investment outcome for most auto-enrolled members. TPR's investment guidance and the FCA's value for money framework (under development for workplace pensions) both emphasise that default fund selection should be based on member outcomes, not provider convenience or commercial relationships.
The charge cap for default funds in qualifying auto-enrolment schemes is 0.75% per annum (including all charges levied on the member). This cap applies to master trusts and contract-based schemes alike. Providers that levy transaction costs, performance fees, or other charges in addition to the AMC must demonstrate that the total cost to the member does not exceed 0.75%. Employers and their advisers should obtain a full charges disclosure from any pension provider before selection, not only the headline AMC figure.
FAQ
What happens if an employer misses the auto-enrolment deadline for a new starter?
The employer must enrol the worker from their duties start date, not from a later administrative convenience date. If enrolment is delayed, the employer must make backdated contributions covering the period from the duties start date. TPR can issue a Compliance Notice requiring backdated contributions and may impose a Fixed Penalty Notice for the breach. Workers must not be enrolled retrospectively for a period already worked without receiving the contributions they were entitled to during that period.
Can workers opt out of auto-enrolment and what happens if they do?
Workers can opt out within one month of being enrolled, after which any contributions already deducted must be refunded within one month. Workers who opt out must be re-enrolled at the three-year re-enrolment date. Employers cannot encourage or induce workers to opt out - doing so is a criminal offence. Workers who opt out as a result of employer pressure can report this to TPR, which will investigate and can prosecute the employer.
What is the difference between the lower earnings limit and the earnings trigger for auto-enrolment?
The earnings trigger (£10,000 per year in 2025-26) is the threshold above which a worker aged 22-66 must be automatically enrolled. The lower earnings limit (£6,240) is the lower bound of qualifying earnings - contributions are calculated only on earnings above this figure. A worker earning £15,000 per year has qualifying earnings of £8,760 (£15,000 minus £6,240), and the minimum 8% contribution applies to this £8,760 amount rather than the full £15,000.
Can an employer use more than one pension provider for auto-enrolment?
Yes. Employers can use different pension providers for different categories of worker - for example, a master trust for hourly-paid workers and a contract-based group personal pension for salaried staff. Each scheme must independently qualify for auto-enrolment purposes. Using multiple schemes increases administration complexity and payroll integration requirements but may be commercially appropriate where different worker groups have different needs.
What is the charge cap for workplace pension default funds?
The charge cap for default funds in qualifying auto-enrolment schemes is 0.75% per annum, applied to all charges levied on the member including annual management charges, transaction costs, and any other charges. The cap was introduced in April 2015 and applies to master trusts and contract-based schemes. Performance fees and adviser charges paid from the default fund count towards the cap. Providers must disclose all charges clearly in their scheme information documents.
How We Verified
This article draws on The Pensions Regulator's auto-enrolment and re-enrolment guidance, the Pensions Act 2008, HMRC qualifying earnings guidance, and FCA workplace pension value for money framework documentation. Provider descriptions are based on publicly available product documentation as of May 2026. No pension provider paid for inclusion in this article.
