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Investing $10,000 – Fill a Roth IRA, Then Buy a Broad Index Fund

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Just the Tip:

With $10,000 to invest, use accounts with tax breaks before a regular one. Take any 401(k) match you’re missing, pay off high-interest debt, and top up your emergency fund. Then fill this year’s Roth IRA, and put the rest in a broad, low-cost index fund in a brokerage account.

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The account you choose matters more than the fund you buy.

Accounts with tax breaks have yearly limits you can’t make up later, while a brokerage account takes any amount, any time. Work down this list until the money runs out.

  1. Take your full 401(k) match first, since a 50% match is an instant 50% return. A 401(k) takes money only from paychecks, so raise your contribution and let the $10,000 cover the smaller ones.
  2. Pay off high-interest debt such as credit cards. Clearing a card that charges 22% is a guaranteed 22% return.
  3. Top up your emergency fund, so a surprise bill never forces you to sell investments when prices are down.
  4. Fill this year’s Roth IRA. Money goes in after tax and comes out tax-free in retirement. You can’t put in more than you earned this year, and at higher incomes the limit shrinks, down to zero.
  5. Fund a health savings account (HSA) too if you have a high-deductible health plan. Contributions are deductible, and withdrawals for eligible medical bills are tax-free.
  6. Put the rest in a broad index fund in a regular brokerage account, or raise your 401(k) further the same way if you won’t need it before retirement.

Say you get the match, owe nothing on cards, and have a full emergency fund. If you’re under 50, this year’s limit, $7,500, goes in the Roth and the rest in a total-market index fund.

Invest it all at once, since Vanguard’s research found a lump sum beat splitting it into three monthly purchases about two-thirds of the time from 1976 to 2022. If a drop right after would rattle you, dollar-cost averaging, spreading it over a few months, is fine too.

Skip hot stocks, and don’t pay an advisor 1% a year to manage it. At an assumed 7% yearly return, that fee leaves you 6%, so $10,000 grows to about $57,400 in 30 years instead of $76,100.

Buy the index fund the day each deposit arrives, since the money sits in cash until you choose an investment.

Pick a brokerage for your Roth from the best places to open an IRA.

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