Most investors have heard some version of the rule: subtract your age from 100, and that is the percentage you should hold in equities. It is tidy, memorable, and almost entirely useless as a standalone guide. Your age is one input. Your income stability, debt load, risk tolerance, pension entitlements, family obligations, and investment horizon are equally important — and far more personal.
This post is not going to hand you a formula. It is going to give you a framework for thinking about asset allocation by age in a way that actually holds up when your life gets complicated — which it will.
Why Age-Based Rules Exist (and Where They Break Down)
The logic behind age-based allocation is sound at its core: younger investors have more time to recover from market downturns, so they can afford to take more equity risk. As you approach retirement, the sequence-of-returns risk — the danger that a market crash in the first years of drawdown permanently damages your portfolio — becomes more severe, so shifting toward lower-volatility assets makes sense.
The problem is that "100 minus your age" (or the updated "110 minus your age" or "120 minus your age" variants) treats every investor at a given age as identical. A 55-year-old with a generous defined-benefit pension, no mortgage, and grown children has a completely different risk capacity than a 55-year-old who is self-employed, still paying a mortgage, and supporting elderly parents. The same equity percentage would be reckless for one and unnecessarily conservative for the other.
⚠️ Important: Asset allocation affects your long-term returns and your ability to sleep at night. The framework here is educational. Tax treatment of different asset classes varies significantly by country and changes over time — always verify with a qualified adviser in your jurisdiction.
The Two Things Age Actually Tells You
Rather than using age as a direct input to a formula, use it as a proxy for two things:
- Investment horizon — roughly how many years before you need to draw on this money meaningfully.
- Human capital — the present value of your future earnings. Early in your career, most of your wealth is still unearned. Later, most of it is already invested.
A 30-year-old with a stable salaried job has enormous human capital — a reliable income stream that functions a bit like a bond. That makes a high equity allocation in their financial portfolio reasonable. A 30-year-old freelancer with volatile income already has bond-like risk in their human capital (unpredictability), which is an argument for somewhat more stability in their investment portfolio.
This reframing — thinking about your total economic balance sheet, not just your brokerage account — is more useful than any age-based rule. You can read more about why tracking your complete financial picture matters in our guide on how to track your entire net worth.
A Practical Framework Across Life Stages
Rather than prescribing percentages, here is how the key considerations tend to shift across broad life stages. Use this as a checklist, not a prescription.
Early career (roughly 20s–mid-30s)
| Priority | Why it matters at this stage |
|---|---|
| Maximising equity exposure | Long horizon absorbs volatility |
| Building emergency fund first | Prevents forced selling at bad times |
| Low-cost, diversified index funds | TER (total expense ratio) compounds over decades |
| Starting pension contributions early | Tax advantages and time compound together |
The single most damaging mistake at this stage is not taking enough risk — holding too much cash or bonds because markets feel scary. Common investment tracking mistakes often start here, with investors who cannot clearly see their actual returns and underestimate how much drag conservative allocation creates over 30+ years.
Mid-career (roughly mid-30s–early 50s)
This is when complexity typically peaks. Mortgages, children, career changes, inheritance, real estate purchases — all of these affect your actual risk capacity. Key questions to ask:
- Do you have illiquid assets (property, private equity, pension funds with lock-in periods) that already reduce your overall liquidity?
- Is your income stable enough that you would not need to sell investments in a downturn?
- Are you tracking your real return — not just account balance growth, but IRR adjusted for contributions and withdrawals? If not, you may be flying blind. Our post on why your portfolio return is probably wrong explains why this matters.
A 45-year-old with 60% equities, 20% real estate (via crowdfunding or direct ownership), 10% bonds, and 10% cash is not following a formula — they are reflecting their actual circumstances.
Pre-retirement (roughly 50s–early 60s)
Sequence-of-returns risk becomes real here. A 30% market drop the year before you retire is far more damaging than the same drop at 35, because you have less time and fewer future contributions to recover.
Practical shifts to consider:
- Gradually reducing equity concentration — not a sudden rebalancing
- Increasing allocation to assets with lower correlation to equities (not just bonds — short-duration fixed income, real assets, stable dividend payers)
- Building a "cash buffer" of 1–2 years of expected drawdown needs, so you are never forced to sell equities in a downturn
Understanding CAGR and annualised growth becomes especially useful here — it helps you stress-test whether your projected returns are realistic given a more conservative allocation.
Retirement and drawdown
This stage deserves its own full post, but the core principle is: you are no longer optimising purely for growth. You are optimising for sustainable income and capital preservation. Some equity exposure still makes sense — a 65-year-old may have a 25–30 year investment horizon — but the composition and sequencing of withdrawals matters enormously.
What This Framework Does NOT Cover
Be honest with yourself about the limits of any framework:
- Behavioural risk: If a 40% equity allocation causes you to panic-sell in a downturn, a theoretically "correct" 80% equity allocation is worse than a 50% one you will actually hold through volatility.
- Tax efficiency: In many jurisdictions, the tax treatment of equities, bonds, real estate, and pension wrappers differs substantially. Allocation decisions and tax decisions are intertwined. Check your own country's rules.
- Currency risk: If you are a European investor holding significant USD-denominated assets, currency exposure is part of your allocation whether you account for it or not. Multi-currency portfolio tracking can make this visible.
- Concentration risk: A well-diversified 70% equity allocation is not the same as 70% in a single sector or geography.
Putting It Together: Track What You Actually Own
A framework is only useful if you can see your real allocation clearly — across every account, asset class, and currency. Many investors who think they have a balanced portfolio discover, when they add everything up, that their pension is 90% equities, their brokerage is 70% equities, and their "diversification" into real estate crowdfunding is a small fraction of the total. The headline allocation they imagined does not reflect reality.
This is exactly the problem that portfolio trackers solve — not by telling you what to own, but by showing you what you actually own. Tracking multiple brokerage accounts in one place is a practical prerequisite for making any allocation decision with real information.
Age is a useful starting point for thinking about asset allocation. It is a poor ending point. Use it to frame your horizon and your human capital — then layer in your actual circumstances, your real risk capacity, and a clear view of what you currently hold.
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