Hong Life CalculatorsUnderstanding the advisory fee impact calculator — concept and principle
Advisory, wrap and managed-account fees are usually quoted as a small percentage of assets per year, such as 1% or 1.5%. Because the fee is taken from the whole balance every year, including past growth, its cost compounds just like returns do. This calculator shows how much a percentage fee costs over a holding period in dollars and as a share of what you would otherwise have had.
How it is calculated
- Value without fee: G = P × (1 + r)^Y.
- Value after fee: N = P × [(1 + r) × (1 − f)]^Y.
- Fees cost you = G − N; share of gross result = 1 − N ÷ G = 1 − (1 − f)^Y.
- Net annual return = (1 + r) × (1 − f) − 1.
P is the starting investment, r the gross annual return, f the annual fee and Y the number of years. The model applies the return first and then deducts the fee once a year.
The principle
A 1.5% fee sounds small next to a 7% return, but it takes nearly a quarter of each year's gain and, more importantly, the money removed can no longer compound. The lost share of the final value depends only on the fee and time: 1 − (1 − f)^Y. It does not depend on the return at all. At 1.5% for 20 years that share is 26.1%; at 0.2% it would be about 4%. This is why low-cost index investing is so often recommended: costs are one of the few things an investor can control with certainty.
Worked example
Default inputs: investment $100,000, gross return 7%, fee 1.5%, 20 years.
- Without fee: 100,000 × 1.07^20 = $386,968.
- After fee: yearly factor 1.07 × 0.985 = 1.05395, so 100,000 × 1.05395^20 = $286,022.
- Fees cost you 386,968 − 286,022 = $100,946.
- Share of the gross result: 1 − 0.985^20 = 26.1%; net annual return 5.39%.
How to read the result
Compare the dollar cost with the value you get: planning, tax management, rebalancing or behavioural coaching can be worth paying for, but the benefit must exceed the drag. Remember that the advisory fee is often charged on top of the expense ratios of the funds inside the account, so add both to get your all-in cost. Even differences of 0.5 percentage points become large over 20–30 years.
Common mistakes
- Comparing fees only to returns ("1% of 7%") instead of to the final balance.
- Forgetting underlying fund expenses, trading costs and platform fees.
- Assuming a higher fee buys a higher return; the return is uncertain, the fee is not.
- Ignoring that tiered fees may fall as the balance grows.
Frequently asked questions
How much does a 1% fee cost over 30 years?
It removes 1 − 0.99^30, about 26% of the final value, regardless of the return.
Is 1% a normal advisory fee?
Around 1% a year is commonly quoted for smaller accounts, with lower rates at larger balances, but it varies widely.
Are these fees tax deductible?
It depends on your country and account type; check current tax rules.
Sources: U.S. Securities and Exchange Commission, Investor Bulletin: How Fees and Expenses Affect Your Investment Portfolio · Bogle, John C., The Little Book of Common Sense Investing