Asset Allocation Return Calculator

60% equity at 8%, 30% bonds at 4%, 10% cash at 3% = 6.3% weighted return. Standard portfolio construction arithmetic. Higher equity share boosts expected return but raises volatility proportionally.

Run it with sensible defaults

Using equity of 60%, equity return of 8%, bond of 30%, bond return of 4%, the calculation works out to 6.30%. The defaults are meant as a starting point, not a recommendation.

The levers in this calculation

The inputs — Equity %, Equity Return, Bond %, Bond Return, and Cash Return — do not pull with equal force. Not every input has equal weight. Adjusting one input at a time toward extreme values shows which ones move the result most.

How the math works

Weighted average. Cash share = 100 - equity - bond.

Where this fits in planning

This is a "what-if" tool, not a forecast. Use it to test ideas before committing: what happens if the rate is 2% lower than hoped, what happens if you add five more years. The value is in the scenarios you run, not the single answer you get from the defaults.

What this doesn't capture

Steady-rate math ignores real-world volatility. Actual returns are lumpy; sequence-of-returns risk matters most in drawdown; fees and taxes drag on compound growth; and behaviour changes in drawdowns can reduce outcomes below the projection. The number represents one scenario rather than a forecast.

Related calculations worth running

Plans get firmer when you triangulate. Alongside this one, the 100 minus age rule calculator, the portfolio concentration risk calculator, and the asset allocation calculator tend to come up in the same conversations. Running two or three together exposes inconsistencies in any single assumption — which is usually where the useful insight lives.

Worked example

Suppose you hold three asset classes and want to model the blended return:

• Equities: 50% of portfolio, expected return 7% per year
• Bonds: 35% of portfolio, expected return 3.5% per year
• Cash: 15% of portfolio, expected return 2% per year

Entering these figures into the calculator yields: (0.50 × 7) + (0.35 × 3.5) + (0.15 × 2) = 3.5 + 1.225 + 0.30 = 5.025% blended return. This illustrates how a conservative allocation with meaningful equity exposure can model a mid-range outcome across market conditions.

Scenarios where this tool matters

This calculator is most useful when:

• Comparing two or more allocation mixes side by side to see which returns higher estimates
• Testing how sensitive your overall return is to small changes in equity allocation or asset class assumptions
• Building narrative around what a given portfolio mix is expected to generate under stable conditions
• Stress-testing assumptions: "if bonds returned 2% instead of 4%, what would the portfolio return be?"
• Isolating the impact of one input without recalculating by hand

When this matters less

The calculator is less helpful for modelling actual sequence risk, inflation-adjusted returns, or the effects of fees and withdrawals. Those demand additional layers of calculation.

What the result shows and does not show

The output is a weighted average return — a point estimate of blended performance under the assumptions you enter. It shows how different asset weightings affect overall return when each class performs at its stated rate.

It does not show:

• Volatility or risk profile of the portfolio
• How returns will actually unfold month to month or year to year
• The effect of fees, taxes, or inflation
• Rebalancing costs or market timing
• Historical performance or future probability of achieving the stated returns
• Drawdown depth or recovery time in adverse markets

Educational context

This calculation is for educational illustration and scenario modelling only. Actual portfolio outcomes depend on market conditions, timing, costs, and behaviour — none of which this static weighted average captures.