What A Brokerage Account Costs You At Tax Time

I opened a brokerage account because my 401k felt like a locked room. The money went in, the balance went up, and I could not touch any of it for roughly three decades without paying a penalty. A brokerage account had no limit, no waiting, no forms about hardship.

It also had a tax bill every year, which I did not find out about until February.

Three ways the account gets taxed

First, dividends. When a company pays out cash to its shareholders, or a fund passes along the dividends it collected, that money is income to you in the year you receive it. It is taxed even if you have the account set to reinvest it automatically and never see a cent of it in your bank.

Second, capital gains when you sell. If you bought at $8,000 and sold at $12,000, the $4,000 difference is a gain, and how it is taxed depends on how long you held.

Held longer than a year, it falls under long-term rates, which are lower. Sold inside a year, it is taxed at your regular income rate, which for most people is higher.

Third, capital gain distributions you did not ask for. A mutual fund that sells holdings at a profit has to pass those gains to everyone holding it, so you can owe tax on a gain in a year you bought nothing and sold nothing.

None of those three exist inside a 401k or an IRA. That is the whole difference, and it is bigger than it sounds.

Putting a number on the drag

Take $100,000 in a broad stock index fund in a taxable account, throwing off a 2% dividend yield. That is $2,000 of dividend income in the year.

If those dividends qualify for long-term rates and you are in a 15% bracket for them, the bill is $300.

You did not sell anything. You did not receive anything you could spend. You owe $300.

$300 does not sound like a reason to restructure your finances. Compound it though.

$300 a year, invested at 7% instead of paid to the Treasury, comes to roughly $28,300 over thirty years, and that is on a balance that never grows in the example. On a real account the dividend grows with the balance and so does the bill.

That is the tax drag: a small annual leak in an account whose entire purpose is uninterrupted compounding.

Interest is treated worse than dividends on this measure. Interest from a savings account, a bond fund or a Treasury bill is generally taxed at your ordinary income rate rather than the lower long-term rate, so the same $2,000 of income costs $440 instead of $300 if your ordinary rate is 22%.

Losses are worth something

The other side of a taxable account is that it lets you claim losses, which a retirement account does not. Sell something for less than you paid and the loss offsets gains you realised elsewhere, dollar for dollar.

If your losses exceed your gains, a limited amount can be deducted against ordinary income each year and the rest carries forward. That annual cap is a fixed dollar figure written into law that has not moved in a very long time, so look up the current one rather than trusting a number printed in an article.

There is a rule against gaming this. Sell at a loss, buy the same or a substantially identical security back inside a set window either side of the sale, and the loss is disallowed. The window has been thirty days before and thirty days after, and the definition of substantially identical is less precise than anyone would like.

Why people end up here anyway

Sometimes because the retirement accounts are already full, which is a good problem and the right reason. Sometimes because the money has a job before 59 and a half, like a house or a business or a year off, and locking it in a retirement account would be worse than the tax.

And sometimes because leaving a 401k behind feels like the free choice. It is not free. It costs you the annual shelter, and the shelter is the product.

The order that usually wins

Roughly, and with exceptions for everybody: take any employer match first, because 50 cents matched on a dollar is a 50% return before the market does anything at all. Then fill the tax-sheltered accounts you are eligible for. Then the brokerage account gets whatever is left over.

The exception is money with a job before retirement age. A house deposit, a business, a year not working. Locking that money in an account with an early withdrawal penalty to save $300 of annual tax is a bad trade, and a brokerage account exists precisely for money that has a date on it.

I got this backwards for two years, funding a brokerage account while leaving part of a workplace match unclaimed. The tax drag was the smaller half of that mistake.

What you can actually control

You cannot control tax rates. You can control what you put in a taxable account, because some funds throw off far more taxable income than others while owning broadly the same things.

A broad stock index fund is usually quiet: modest dividends, few forced sales, almost no capital gain distributions if it is an ETF. An actively managed fund that trades heavily is loud, because every profitable trade it makes is a gain it has to hand you. A bond fund pays interest, and interest is generally taxed at your ordinary income rate rather than the lower long-term rate.

So the rough order of operations is to keep the loud things inside retirement accounts where their noise costs nothing, and let the quiet things sit in the taxable account.

Go open your brokerage account and find the distributions history for each fund you hold. You are looking for two lines: dividends, and capital gain distributions. If the second line has a number in it for three years running, that fund is being taxed harder than you think and it may belong somewhere else.