Tax-aware investing: keeping more of what you earned

Ye pay tithe of mint and anise and cummin, and have omitted the weightier matters of the law, judgment, mercy, and faith: these ought ye to have done, and not to leave the other undone. (KJV). Jesus does not cancel the small precision; he refuses to let it crowd out the weightier things. Applied here to tax optimization.

Matthew 23:23

The return you keep

Inside a 401(k) or IRA, buying and selling triggers no tax bill; tax comes, if at all, when money comes out. In a regular taxable brokerage account, the tax collector is a silent partner every single year: dividends are taxed as they are paid, and gains are taxed when you sell. Two investors can hold identical funds, earn identical returns, and end up with different money, decided entirely by which account held what, and how often they traded.

Three rules from the IRS do most of the work here:

Holding period. “Generally, if you hold the asset for more than one year before you dispose of it, your capital gain or loss is long-term. If you hold it one year or less, your capital gain or loss is short-term” (IRS Topic 409). Short-term gains are taxed as ordinary income at your regular rate. Long-term gains get their own, lower rate schedule.
Qualified dividends. Ordinary dividends “are included in ordinary income, whereas qualified dividends are those dividends that qualify to be taxed at lower capital gain rates” (IRS Topic 404). Your 1099-DIV tells you which is which.
The rates themselves are 0%, 15%, or 20% depending on taxable income, with thresholds that the IRS updates annually. Do not memorize a number from an article; read the current one at IRS Topic 409.

The practical consequence is unglamorous and large: turnover is expensive. A fund or a habit that sells constantly converts what could have been lightly taxed long-term gains into fully taxed ordinary income, every year, forever. Patience is not only a virtue here; it is a rate cut.

Asset location: which account holds what

Asset allocation is your stock-and-bond mix, the subject of portfolio construction. Asset location is which account each piece sits in. The logic is simple: shelter the things that get taxed hardest and most often.

Tends to belong in tax-advantaged accounts	Tends to belong in taxable accounts
Taxable bonds and bond funds (interest is ordinary income, paid every year)	Broad stock index funds and ETFs (low turnover, mostly qualified dividends)
REITs: their dividends “generally are treated as ordinary income” (Investor.gov)	Holdings you may want to donate or leave to heirs
Actively traded or high-turnover funds	Municipal bonds, if you hold them at all

Vanguard’s research puts the payoff at up to about 30 basis points, 0.3%, of extra after-tax return per year for well-diversified investors. Real, compounding, worth doing. Also small enough that Vanguard attaches the caveat in the same breath: “Strategic asset allocation remains the priority. Compromising allocation for tax efficiency can be far more damaging than imperfect asset location.”

Tax-loss harvesting, and the rule that voids it

If an investment is worth less than you paid, selling it realizes a capital loss. Losses first offset capital gains; beyond that, “the amount of the excess loss that you can claim to lower your income is the lesser of $3,000 ($1,500 if married filing separately),” and anything left “you can carry the loss forward to later years” (IRS Topic 409). Sell the loser, book the loss, buy something similar-but-different, stay invested. That is tax-loss harvesting.

The trap is the wash-sale rule. A wash sale occurs when you sell securities at a loss and within 30 days before or after the sale you buy substantially identical securities, acquire them in a fully taxable trade, or acquire an option to buy them (Investor.gov; IRS Publication 550). The loss is then disallowed: you get no deduction. It is added to the basis of the replacement shares instead, so the benefit is deferred rather than destroyed, but the deduction you were counting on this year is gone. (If the replacement is bought inside an IRA, the loss is not added to the IRA’s basis, so it is lost for good.) Note the window is 61 days wide and covers every account you control, including an IRA and, in practice, a spouse’s account. An automatic dividend reinvestment two weeks after your sale can trigger it without you doing anything.

Also worth saying plainly: harvesting a loss does not make losing money good. It recovers a fraction of a real loss.

Where tax-cleverness turns into folly

Every year people hold a concentrated position they should have sold, refuse a needed rebalance, or park cash in a bad product, all to avoid a tax bill smaller than the risk they are carrying. The tax tail wags the stewardship dog. A 20% tax on a gain is a far better outcome than a 50% loss on an unsold position.

Jesus’ words to the meticulous tithers of mint and cummin are the right calibration, in both directions: “these ought ye to have done, and not to leave the other undone” (Matthew 23:23, KJV). He does not mock the small precision. He refuses to let it displace judgment, mercy and faith. Lawful tax planning is good stewardship: Romans 13:7 assumes what is owed gets rendered, and paying more than the law requires is not extra holiness. But if your tax strategy is consuming hours, obscuring what you actually own, or quietly reshaping what you give, the mint and cummin have taken over.

Nothing here is personalized tax advice. Rules change and situations differ; see when a professional earns their fee.

Before you go

Check yourself

1Two investors hold identical funds and earn identical returns. Why can they keep different amounts, and which holdings tend to go in which kind of account?
Because the account and the trading habit differ. Inside a 401(k) or IRA nothing is taxed until money comes out; in a taxable account dividends are taxed as paid and gains when you sell. Held more than one year a gain is long-term, at 0%, 15%, or 20% depending on income; one year or less is short-term, taxed as ordinary income. Taxable bonds, REITs, and high-turnover funds tend to belong in tax-advantaged accounts; broad stock index funds and holdings you may donate or leave to heirs tend to fit the taxable account. Good location is worth up to about 0.3% a year, and Vanguard adds that compromising your allocation for tax efficiency can be far more damaging than imperfect location.
2You sold a fund at a loss, and a dividend reinvestment bought it back two weeks later. Do you still have the loss this year?
Probably not. That is a wash sale: you sold at a loss and, within 30 days before or after, bought substantially identical securities. The window is 61 days wide and covers every account you control, including an IRA and, in practice, a spouse's account. The disallowed loss is usually added to the basis of the replacement shares, so it is deferred, but if the replacement is bought inside an IRA the loss is not added to the IRA's basis and is lost for good. Otherwise a harvested loss offsets gains first, then up to $3,000 ($1,500 if married filing separately) of other income, with the rest carried forward.
3A tax bill is a good enough reason to hold a concentrated position or skip a needed rebalance. Where does that turn into folly?
When the tax you are avoiding is smaller than the risk you are carrying. A 20% tax on a gain is a far better outcome than a 50% loss on a position you refused to sell. Matthew 23:23 does not mock the small precision, it refuses to let it displace judgment, mercy, and faith. Lawful planning reduces what is owed; Romans 13:7 assumes tax gets paid, and paying more than the law requires is not extra holiness. If the strategy is consuming hours or hiding what you own, the mint and cummin have taken over.

Do this now

List the three holdings that throw off the most taxable income and the account each sits in. Move nothing this week. Mark any the location table says is in the wrong kind of account, and any sale you are postponing only because of a tax bill smaller than the risk.

Carry this with you