Asset Allocation by Age and Risk Tolerance: Building Your Own Glide Path

Target-date funds automate the process of shifting from stocks to bonds as you age. Building your own asset allocation gives you the same underlying logic with more control over the assumptions.

The “Age in Bonds” Starting Point

The classic rule of thumb was to hold a bond percentage equal to your age — 30% bonds at 30, 60% bonds at 60. Most financial planners now treat that as too conservative given longer life expectancies, and commonly suggest subtracting your age from 110 or 120 instead to set your stock percentage, keeping investors more heavily in equities for longer.

Risk Tolerance Isn’t Just a Number

Two 40-year-olds with identical incomes can have very different real risk tolerance depending on job stability, other assets, and how they behaved the last time the market dropped 20%. Someone with volatile 1099 income, or a small business owner whose income is already correlated with the economy, often needs a more conservative allocation than a stable W-2 employee with the same age and balance, since their income and portfolio can drop at the same time.

This Is Distinct From a Target-Date Fund’s Glide Path

A target-date fund’s glide path is a single, pre-set curve applied to every investor who picks that retirement year, inside a retirement account. A self-managed allocation lets you adjust for taxable accounts alongside retirement accounts, personal risk tolerance that doesn’t match the fund’s default curve, and a mix of goals with different time horizons.

A Simple Three-Bucket Framework

Money needed within 2 years belongs in cash or high-yield savings, not the market. Money needed in 3-10 years can hold a moderate stock/bond mix. Money not needed for 10+ years can hold a more aggressive, stock-heavy allocation, since there’s time to recover from a downturn. Applying this bucket logic across all accounts together — not managing each account in isolation — is what actually replicates what a good glide path does automatically.

Rebalancing Keeps the Plan Honest

An allocation set once and never revisited drifts as stocks and bonds grow at different rates. Reviewing the mix annually and rebalancing back to target keeps the actual risk level in line with the one originally chosen, rather than the one the market happened to leave behind.

Written by Samuel, Certified Public Accountant

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