Retirement Planning: Government pensions — what to expect, and how to plan around them

Social Security was introduced in 1935 to prevent destitution in old age. It was never designed to be a retirement plan. Ninety years later, millions of people are relying on it as one.

What government pensions are — and what they aren't

In almost every developed country, the government provides some form of retirement income: Social Security in the United States (US), the State Pension in the United Kingdom (UK), the Canada Pension Plan (CPP) in Canada, and equivalent schemes in Australia, across Europe, and beyond. The details differ, but the underlying concept is the same — a baseline income funded through contributions made during your working life, paid back monthly from a defined age until death.

These programmes are, by design, a floor. They were built to prevent poverty in old age, not to replace a working income. Understanding that distinction changes how you plan.

Why it matters

The promise is real — but it's been overstated

The most important thing to understand about government pensions is that they exist, they are durable, and they will very likely be there when you need them. In the US, Social Security is the most politically protected programme in the federal budget — cutting benefits is so unpopular across party lines that it rarely advances beyond rhetoric.

What is genuinely uncertain is the level of those benefits. The Social Security Trustees Report, published annually, projects that the combined trust funds will be depleted by approximately 2033–2035 if Congress takes no action.¹ At that point, incoming payroll tax revenue would cover roughly 77–83% of scheduled benefits — meaning a benefit reduction of around 17–23%, not elimination. This is the basis for the widely cited "plan for 70–80% of promised benefits" framing, and it is a reasonable working assumption for anyone currently under 55.

The UK State Pension faces a different but analogous pressure: an ageing population and the cost of the triple lock (which guarantees annual rises tied to the highest of inflation, earnings growth, or 2.5%) make the current formula increasingly expensive to sustain.² The State Pension is unlikely to be abolished, but the qualifying age has risen steadily — from 65 to 67, with 68 under review — and further increases are probable.

What you can actually expect to receive

United States. The full Social Security retirement benefit — available at Full Retirement Age (FRA), currently 67 for anyone born after 1960 — replaces roughly 40% of pre-retirement earnings for average earners, and a lower percentage for higher earners.³ You can claim as early as 62 (with a permanent reduction of up to 30%) or delay until 70 (with an 8% per year increase in benefit). For a married couple with one higher-earning spouse, coordinating claim ages can significantly increase lifetime total benefits.

United Kingdom. The full new State Pension (for those reaching State Pension age after April 2016) is currently £221.20 per week (2024/25), or roughly £11,500 per year — provided you have 35 qualifying National Insurance (NI) years. Fewer qualifying years means a proportionally lower amount, down to a minimum of 10 qualifying years for any benefit at all. State Pension age is currently 66, rising to 67 between 2026 and 2028.⁴

Canada. CPP replaces approximately 25% of average career earnings up to a ceiling, with maximum benefits of around C$1,300/month (2024) at age 65. The Old Age Security (OAS) pension adds a further flat amount — roughly C$700/month — available from age 65 regardless of work history, subject to an income clawback above a threshold.⁵

Australia. The Age Pension (available from 67) is means-tested and assets-tested, designed to top up superannuation drawdowns rather than stand alone. Most Australians with adequate superannuation balances will receive reduced or no Age Pension.

Across all systems, the common thread: government pension income typically replaces 25–45% of pre-retirement earnings, not 70–80%. The gap — which can easily be $1,500–$3,000/month — must come from elsewhere.

Timing decisions have a larger effect than most people realise

In the US, the decision of when to claim Social Security is one of the most consequential financial decisions a retiree makes. Claiming at 62 versus 70 can produce a 76% difference in monthly benefit.⁶ For someone in good health, delaying is typically the higher expected-value choice — the break-even point (where total lifetime benefits equalise) is usually in the early-to-mid 80s. For someone in poor health or with no other income source, earlier may make sense. This decision is worth modelling with care.

How to improve your position

• Check your projected benefit now, not at 60 — in the US, create an account at ssa.gov to see your earnings record and projected benefit at different claiming ages. In the UK, check your State Pension forecast via gov.uk. Doing this early means you have time to correct gaps or adjust your saving rate.
• Address NI or contribution gaps if you can — UK workers with fewer than 35 qualifying NI years can often make voluntary contributions to fill gaps, at very low cost relative to the additional State Pension received. Check your NI record at gov.uk before the deadline for voluntary contributions (currently six years back).
• Don't plan around 100% of the promised benefit — use 75% of your current projected figure as your planning assumption, particularly if you're more than 10 years from retirement age. This builds in a meaningful buffer against legislative changes without assuming catastrophe.
• Coordinate claiming strategies if you're married — in the US, spousal and survivor benefits mean the higher earner delaying to 70 often maximises total household lifetime income, particularly if there is a significant age or earnings gap between partners.
• Add your government pension to your income planner — 100 Great Years plans for state retirement benefits directly in the platform. Enter your expected amount and start age as a "State pension / Social Security" income stream in your Plan tab, and mark it as inflation-linked. This immediately anchors your Wealthspan projection in a realistic income floor.
• Treat it as one layer, not the whole plan — a robust retirement typically involves three sources: government pension (base layer), workplace/personal pension or 401(k)/superannuation (second layer), and personal savings or investment income (third layer). Identify how much each layer will contribute for you.
• Model the effect of working longer — an additional two or three years of contributions plus a delayed claim date can meaningfully shift the income picture. The Plan tab's income planner lets you model this by adjusting the end date of your employment income stream alongside the start date of your pension.
• Be cautious with relying on inheritance or property equity — these are real assets but unreliable income sources; timing is unpredictable and costs (care, property maintenance) are often underestimated. Government pension and private pension income are more forecastable.

The 100 Great Years perspective

A government pension is a meaningful asset — but it is a foundation, not a plan. At 100 Great Years, we model income streams across the full arc of your financial life precisely because the gap between what government programmes will provide and what a genuinely good later life costs is large enough to require deliberate action. The earlier you understand what you can expect from the state and what you need to build yourself, the more options you have — and the less stressful those later decades become. Adding your expected government pension to your income planner is one of the most useful things you can do today. It anchors your Wealthspan projection in reality, and makes the gap visible before it becomes a problem.

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This article is for educational purposes only and does not constitute financial advice. Past performance is not a reliable indicator of future results. Always consider your personal circumstances and consult a qualified financial adviser before making investment decisions.