A busy surgeon choosing between a target-date fund vs index funds can use one target-date fund for automatic upkeep or a three-fund mix for more control, as Assante Wealth Management would compare. At a $400,000 balance, a 0.20 percent fund costs $800 a year and a 0.05 percent mix costs $200, so the 0.15 percent gap is $600 a year before growth. The larger practical difference may be who rebalances and whether the glide path fits the household. The usual mistake is treating the lower-cost option as automatically better. The trade-off is money versus upkeep, and doctors short on time tend to discount what an allocation nobody checks can cost. Assante Wealth Management prefers fewer funds and a one-page plan you can explain at the kitchen table. We wrote this page for physicians and dentists who earn well, started saving late, carry student loans and may own a practice. Any investment can fall in value, and you could get back less than you put in.
Step 1: decide what the 401(k) must do
A target-date fund handles allocation and rebalancing inside one fund, while a three-fund index mix leaves both decisions with you. Start by separating the 401(k) from the $1.3 million already saved, the possible $1.2 million practice sale and college bills beginning in two years.
The first question is whether this account is a long-term retirement bucket. Money needed for near-term tuition should not be assigned by a retirement-date label alone. Assante Wealth Management starts the comparison with the job each dollar has, because a fund can be reasonable inside the 401(k) and still be wrong for the household’s total cash needs.
- 401(k) balance and source
- College payment dates
- Outside taxable accounts
- Possible practice-sale timing
Step 2: read the fund sheet, not the label
Gather the target-date fund fact sheet, each index fund’s expense ratio, the stock and bond percentages, and the date of the last allocation change. “Index” only describes how a fund tracks a market. Whether three index funds together match the risk you can live with is a separate question that the word alone cannot answer.
Target-date funds became common default choices in workplace plans after federal qualified-default rules encouraged automatic enrollment and default investing. An older plan may have placed a fund in the account without a deliberate selection. A worrying answer from HR or the custodian is that nobody can explain the stock percentage, rebalancing method or total annual cost.
- Target-date prospectus
- Index-fund expense ratios
- Stock and bond percentages
- Last allocation-change date
Step 3: put cost beside the work
The table uses one assumption: a $400,000 401(k), a 60 percent stock and 40 percent bond target, and annual fund costs of 0.20 percent for the target-date fund versus 0.05 percent for the three-fund mix. The dollar gap is real, but the work assigned to the owner can matter more.
A three-fund mix can have low fund expenses and still fail when the owner leaves it untouched after a market move. Ask the plan custodian whether automatic rebalancing is available and whether it changes only the 401(k) or any outside account. Assante Wealth Management would also check whether the target-date fund changes its stock percentage on a schedule that fits the rest of the household.
| Milestone | Target-date fund | Three-fund index mix |
|---|---|---|
| At selection | One fund | Three funds |
| Annual fund cost | $800 | $200 |
| Rebalancing | Fund handles it | Owner handles it |
| Glide path | Changes over time | Set by owner |
| Main catch | May not fit outside assets | Can drift from target |
- Compare annual fund costs
- Confirm automatic rebalancing
- Write the target allocation
Step 4: test the choice against a practice sale
Hypothetical: Kwame and Colleen expect a possible $1,200,000 practice-sale payment and have $1,300,000 saved. Their youngest starts college in two years, and they estimate $80,000 for each of the next two years. They first reserve $80,000 × 2 = $160,000, leaving $1,040,000 of the possible sale proceeds before tax and transaction costs.
That reserve should not be placed in a target-date fund merely because its year matches their age. Tuition has a near deadline; the 401(k) may have a much longer job. Keeping those purposes separate makes a later fund decision reversible without selling money needed for school.
For a $400,000 401(k), a target-date fund costing 0.20 percent costs $400,000 × 0.002 = $800 each year. Three index funds costing 0.05 percent cost $400,000 × 0.0005 = $200, a $600 difference. The difference matters less than whether Kwame and Colleen will actually rebalance the three funds while handling a possible sale and college bills.
If Kwame will not rebalance during that period, one target-date fund may reduce an operational mistake. If they can maintain a written 60 percent stock and 40 percent bond mix across the relevant account, three index funds may provide more control. The target-date fund still cannot account for practice-sale proceeds, college bills, outside accounts or Colleen’s risk tolerance.
This arithmetic does not estimate sale taxes, goodwill allocation or final net proceeds. Investments can lose value, so the $1,040,000 is not a forecast of available wealth.
- Possible sale proceeds
- Tuition reserve
- Tax and transaction uncertainty
- Written stock target
Step 5: put the fund choice on the calendar
The spouse who notices the fund menu first usually raises the issue. Discuss it with the next college payment and practice-sale uncertainty in view, then set one review date after the sale decision, one before tuition begins and at least one annual allocation check.
A large market move can create pressure to act, especially when nobody wrote down the intended allocation beforehand. Ask the custodian how quickly an exchange settles and whether a fund change affects future payroll contributions as well as the existing balance. Assante Wealth Management sets the review on a calendar date, chosen before the next frightening statement arrives.
- Next college payment
- Practice-sale decision
- Annual allocation check
- Exchange settlement timing
Step 6: catch an inherited allocation
A former employer’s default may still control part of the household’s retirement money, so check old 401(k) statements, default enrollment notices and beneficiary records before changing funds. A target-date fund can conceal an allocation that conflicts with taxable assets, practice equity or tuition reserves.
Hypothetical: a dentist picks three index funds after a job change and never rebalances. Over a few strong years, the stock fund drifts to 70 percent of the account against an intended 60 percent. Without ever choosing it, the household now carries more stock risk. Checking current percentages and the plan’s rebalancing feature each year catches that drift.
A household that will not read the fund sheet or make the annual check should favor the option that removes the task, provided its glide path is acceptable. The target-date label is not a substitute for checking what the fund owns.
- Old 401(k) statements
- Default enrollment notices
- Beneficiary records
- Current fund percentages
Step 7: choose the task you will actually do
Choose the single target-date fund when you will not rebalance a three-fund mix at least annually and its stock-bond glide path fits your other accounts. Choose the index mix only when you will set and follow a written allocation.
Kwame and Colleen can compare expense ratios and allocations themselves. A conversation with Assante Wealth Management earns its place when the 401(k) must fit with a possible practice sale, a college reserve and other accounts. The request form is the next contact point.
- State the stock percentage
- Confirm annual upkeep
- Separate near-term cash
- Compare the whole household
Your questions about target-date fund vs index funds, answered
My 401(k) statement lists a target-date fund and several index funds; which one should I select before the next payroll date?
Before the next payroll date, compare the target-date fund’s stock percentage, glide path, and annual cost with the allocation you can actually maintain. If you will not check and rebalance three funds at least annually, the single fund is usually the safer operational choice, provided its glide path fits your other accounts and near-term cash needs.
How soon should I change funds if the target-date fund’s stock percentage seems too high?
A high stock percentage is not, by itself, a reason to trade immediately. First check when the fund expects to reduce stocks, then list college payments, practice-sale uncertainty, and other accounts. Make a change before a planned cash need, not in response to a large market drop, unless the allocation clearly conflicts with your written plan.
Sources and further reading
This is general information, not advice tailored to your finances or circumstances. Investing involves risk, including the possible loss of principal. Before making any decision about money, taxes or your practice, talk with a professional who knows your full situation.