What you keep, not what you earn

Mistake 6 of 10: paying too much, or letting taxes drive decisions. Fees compound quietly, and taxes deserve care, but neither should make the investment decision for you.

Fees and taxes are the part of your return you can control. Fees compound quietly. Taxes deserve care, but they shouldn’t make the investment decision for you.

The mistake

Two opposite errors. Not knowing what you pay each year in fund expenses and advice fees. And letting taxes drive every decision: holding an investment you would otherwise sell, only to avoid a tax bill.

The evidence

The SEC’s investor bulletin on fees follows $100,000 growing at 4% a year for 20 years under three annual fee levels. (SEC, Investor Bulletin: How Fees and Expenses Affect Your Investment Portfolio, July 2025)

Annual feeValue after 20 years
0.25%about $208,000
0.50%about $198,000
1.00%about $179,000
Source: SEC Investor Bulletin. Hypothetical: $100,000 growing at 4% a year before fees.

The difference between the lowest and highest fee is about $29,000, on the same investments.

When taxes should, and shouldn’t, drive a decision

  • Stock awards: restricted stock units are generally taxed as income when they vest, at their value that day. Keeping the shares after that is an investment decision, not a tax one.
  • Selling at a loss to cut taxes can be worth doing, but watch the wash-sale rule. If you buy substantially identical securities within 30 days before or after the sale, the IRS disallows the loss for now. (IRS, Instructions for Schedule D, 2025)
  • Where you hold an investment can matter as much as what you hold. Investments that produce a lot of taxable income often belong in tax-deferred accounts.

Judging an advice fee

Ask for the all-in cost: the advice fee plus the expenses of every fund you hold. Then ask what you get for it: planning, tax and cost management, rebalancing, and someone to talk to before you make a costly mistake. A fee is worth paying when what it buys is worth more than it costs.

The tool: a fee and tax check

AccountBalanceAdvice fee %Fund expenses %Total cost a year ($)Holding anything only for tax reasons?

How this is handled in practice

Fees and taxes are the part of the return you control, and both are managed deliberately. Investment management is offered through Gwynedd Wealth Partners, LLC.

This article is for education and is not a recommendation to buy or sell any security, and it is not tax advice. Consult a tax professional about your own situation. Investment advisory services are offered through Gwynedd Wealth Partners, LLC.