Can I build my own target date fund with individual ETFs?

Yes. Many investors use this calculator to create a 'three-fund' or 'four-fund' portfolio using low-cost index ETFs (VTI, VXUS, BND) to achieve the exact same glide path with lower expense ratios.

Updated: August 2026 • Verified v1.2

Target Date Retirement Fund Glide Path & Asset Allocation Calculator

Finance & MathPopular

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Retirement_Year = Current_Year + (Retire_Age - Current_Age); Fund_Year = round(Retirement_Year / 5) * 5; Equity_Pct = f(Years_to_Retirement)

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Understanding Your Results

Calculates recommended fund year, asset allocation percentages across 4 core asset classes (US Equities, International Equities, Bonds, Cash), and exact dollar amounts based on portfolio balance.

Practical Guidance & Next Steps

Target Date glide paths automatically shift from aggressive growth (90% equities) to wealth preservation (50%+ bonds/cash) as you approach retirement.

What is this?

A retirement portfolio allocation utility that models target date fund glide paths and asset class splits.

How does it work?

1. Enter current age and target retirement age. 2. Enter your current total investment portfolio balance. 3. View your recommended fund year and exact asset class breakdown in percentages and dollars.

Why use it?

Shows you how major institutional funds allocate risk across your working career without requiring you to pay advisory fees.

Technical Scope & Calculation Limitations

Models standard institutional Vanguard/Fidelity target date glide paths.

Frequently Asked Questions

A glide path is the mathematical formula that gradually reduces equity exposure and increases fixed income (bonds/cash) as an investor gets closer to their target retirement date.

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