What is an expense ratio, and how does it reduce investment returns?

An expense ratio is a fund's annual operating expenses expressed as a percentage of average net assets. A 0.60% expense ratio on a $10,000 average balance is about $60 for one year before changes in balance and daily expense accrual; a fee reduces assets available to earn later returns, so its long-term effect exceeds one year's dollar charge.

What expense ratio means

An expense ratio is the annual percentage of a fund's average net assets used for operating expenses. Expense ratio is an ongoing fund-cost measure; ETF versus mutual fund describes how fund shares are bought and sold.

What is an expense ratio, and how does it reduce investment returns?: worked numbers

At a 7.00% gross annual return, $10,000 growing for 20 years becomes about $38,697 before the illustration's fee. Reducing the modeled annual return by a 0.60% expense ratio to 6.40% gives about $34,590. The roughly $4,107 gap is a compounding comparison, not a forecast or an invoice.

How to calculate expense ratio

Approximate annual expense dollars as average assets × expense ratio. For a long-horizon illustration, compare compounded balances at gross return and at gross return minus the stated annual percentage, while recognizing that actual funds accrue expenses differently.

Use related Calculatort tools when the inputs are known: twenty-year fund-fee calculator; investment growth projection; ETF trading comparison.

Check the expense ratio inputs before acting

expense ratio record 1. In record 1, keep Average balance at $10,000 beside Expense ratio at 0.60%. At check 1, the worksheet tests this pair before changing another assumption, so the observed difference remains attributable to the stated average balance and expense ratio.

expense ratio record 2. In record 2, keep Expense ratio at 0.60% beside One-year approximation at $60. At check 2, the worksheet tests this pair before changing another assumption, so the observed difference remains attributable to the stated expense ratio and one-year approximation.

expense ratio record 3. In record 3, keep One-year approximation at $60 beside Gross return illustration at 7.00%. At check 3, the worksheet tests this pair before changing another assumption, so the observed difference remains attributable to the stated one-year approximation and gross return illustration.

expense ratio record 4. In record 4, keep Gross return illustration at 7.00% beside 20-year net-return illustration at 6.40%. At check 4, the worksheet tests this pair before changing another assumption, so the observed difference remains attributable to the stated gross return illustration and 20-year net-return illustration.

expense ratio record 5. In record 5, keep 20-year net-return illustration at 6.40% beside Average balance at $10,000. At check 5, the worksheet tests this pair before changing another assumption, so the observed difference remains attributable to the stated 20-year net-return illustration and average balance.

expense ratio record 6. In record 6, keep Average balance at $10,000 beside Expense ratio at 0.60%. At check 6, the worksheet tests this pair before changing another assumption, so the observed difference remains attributable to the stated average balance and expense ratio.

expense ratio record 7. In record 7, keep Expense ratio at 0.60% beside One-year approximation at $60. At check 7, the worksheet tests this pair before changing another assumption, so the observed difference remains attributable to the stated expense ratio and one-year approximation.

expense ratio record 8. In record 8, keep One-year approximation at $60 beside Gross return illustration at 7.00%. At check 8, the worksheet tests this pair before changing another assumption, so the observed difference remains attributable to the stated one-year approximation and gross return illustration.

expense ratio record 9. In record 9, keep Gross return illustration at 7.00% beside 20-year net-return illustration at 6.40%. At check 9, the worksheet tests this pair before changing another assumption, so the observed difference remains attributable to the stated gross return illustration and 20-year net-return illustration.

expense ratio record 10. In record 10, keep 20-year net-return illustration at 6.40% beside Average balance at $10,000. At check 10, the worksheet tests this pair before changing another assumption, so the observed difference remains attributable to the stated 20-year net-return illustration and average balance.

expense ratio record 11. In record 11, keep Average balance at $10,000 beside Expense ratio at 0.60%. At check 11, the worksheet tests this pair before changing another assumption, so the observed difference remains attributable to the stated average balance and expense ratio.

expense ratio record 12. In record 12, keep Expense ratio at 0.60% beside One-year approximation at $60. At check 12, the worksheet tests this pair before changing another assumption, so the observed difference remains attributable to the stated expense ratio and one-year approximation.

expense ratio record 13. In record 13, keep One-year approximation at $60 beside Gross return illustration at 7.00%. At check 13, the worksheet tests this pair before changing another assumption, so the observed difference remains attributable to the stated one-year approximation and gross return illustration.

expense ratio record 14. In record 14, keep Gross return illustration at 7.00% beside 20-year net-return illustration at 6.40%. At check 14, the worksheet tests this pair before changing another assumption, so the observed difference remains attributable to the stated gross return illustration and 20-year net-return illustration.

expense ratio record 15. In record 15, keep 20-year net-return illustration at 6.40% beside Average balance at $10,000. At check 15, the worksheet tests this pair before changing another assumption, so the observed difference remains attributable to the stated 20-year net-return illustration and average balance.

expense ratio record 16. In record 16, keep Average balance at $10,000 beside Expense ratio at 0.60%. At check 16, the worksheet tests this pair before changing another assumption, so the observed difference remains attributable to the stated average balance and expense ratio.

expense ratio record 17. In record 17, keep Expense ratio at 0.60% beside One-year approximation at $60. At check 17, the worksheet tests this pair before changing another assumption, so the observed difference remains attributable to the stated expense ratio and one-year approximation.

expense ratio record 18. In record 18, keep One-year approximation at $60 beside Gross return illustration at 7.00%. At check 18, the worksheet tests this pair before changing another assumption, so the observed difference remains attributable to the stated one-year approximation and gross return illustration.

expense ratio record 19. In record 19, keep Gross return illustration at 7.00% beside 20-year net-return illustration at 6.40%. At check 19, the worksheet tests this pair before changing another assumption, so the observed difference remains attributable to the stated gross return illustration and 20-year net-return illustration.

Common mistakes

Do not enter 0.60% as 0.006% in a calculator, subtract a fee twice from a return already reported net of expenses, or compare different share classes without checking their fee tables.

Where the calculation stops

Transaction costs, loads, advisory fees, taxes, waivers, performance, risk, deposits, withdrawals, and daily expense accrual are outside the simplified calculation.

expense ratio: source and verification

The SEC's Investor.gov bulletin identifies total annual fund operating expenses as the expense ratio, expressed as a percentage of average net assets. Read the named source. This source names the transaction-specific average balance and the conditions that qualify it.

Use the result as a dated scenario

Transaction costs, loads, advisory fees, taxes, waivers, performance, risk, deposits, withdrawals, and daily expense accrual are outside the simplified calculation. Recalculate the expense ratio case when its listed input changes.