With $400,000 to invest, you have enough capital to build a genuinely diversified portfolio across multiple asset classes, minimize taxes, and generate meaningful long-term growth or income. How you should invest it depends on three things: when you need the money, how much risk you can stomach, and whether this sum is going into tax-advantaged accounts, taxable accounts, or both. Here’s how to think through each piece.
Decide on Your Timeline First
Your investment timeline shapes everything else. Someone who is 35 and won’t touch this money for 25 years can afford a portfolio heavily weighted toward stocks, including more volatile corners like small-cap and international equities that historically deliver higher returns over long periods. Someone who is 60 and planning to retire soon needs a completely different structure.
A useful framework for retirees or near-retirees is the “bucket” approach. You divide the portfolio into three tiers based on when you’ll spend the money. The first bucket holds six months to two years of living expenses (beyond what Social Security or pensions cover) in cash or cash equivalents like money market funds. The second bucket holds another eight to ten years of expenses in bonds. The third bucket, which you won’t touch for a decade or more, goes into stocks and higher-risk investments. As the cash bucket gets spent down, income and rebalancing proceeds from the other two refill it. This structure lets you ride out stock market downturns without being forced to sell at a loss.
If you’re still decades from retirement, you can skip the cash and bond buckets almost entirely and allocate 80% to 90% toward equities, keeping only a small emergency reserve outside your investment portfolio.
Build the Core With Low-Cost Index Funds
For most people, the backbone of a $400,000 portfolio should be broad-market index funds or ETFs. A total U.S. stock market fund gives you exposure to thousands of companies for an expense ratio as low as 0.03% per year, which on $400,000 works out to about $120 annually. Compare that to a typical actively managed fund charging 0.50% to 1.00%, or $2,000 to $4,000 a year, often without delivering better returns.
A straightforward allocation for a moderate-risk investor might look like this:
- U.S. stocks (50%-60%): A total market index fund covering large, mid, and small companies.
- International stocks (15%-25%): A total international fund adds diversification and exposure to economies growing at different rates than the U.S.
- Bonds (15%-25%): A total bond market fund or intermediate-term Treasury fund provides stability and income.
- Cash or short-term reserves (5%-10%): Enough to cover near-term needs without selling investments at a bad time.
An aggressive investor in their 30s or 40s might push equities to 85% or higher and trim bonds to 5% or 10%. A conservative investor nearing retirement might flip those numbers, holding 40% stocks and 50% or more in bonds and cash. The right split is the one you can stick with during a 30% market drop without panic-selling.
Lump Sum or Spread It Out
If you’ve come into $400,000 all at once, through an inheritance, home sale, or business exit, you’ll face a common dilemma: invest it all immediately or ease in over several months through dollar-cost averaging?
The data favors investing the lump sum right away. Morgan Stanley’s analysis of more than 1,000 overlapping historical seven-year periods found that lump-sum investing generated slightly higher annualized returns than dollar-cost averaging in over 56% of cases. In an aggressive portfolio, the lump-sum approach yielded about 0.42% more per year than spreading the investment over 12 months. The logic is simple: markets tend to go up over time, so money sitting in cash while waiting to be invested usually misses out on gains.
That said, the psychological comfort of dollar-cost averaging is real. If investing $400,000 all at once would keep you up at night, splitting it into equal monthly investments over three to six months is a reasonable compromise. The small potential cost is worth it if it keeps you from second-guessing the entire plan after a bad week in the market.
Add Real Estate Exposure
With $400,000, you have several ways to include real estate in your portfolio. The simplest is a REIT (real estate investment trust), which you can buy through a brokerage account for any amount. REITs own commercial properties like apartment buildings, warehouses, and office towers, and they pass most of their rental income to shareholders as dividends. A broad REIT index fund adds real estate diversification without the hassle of being a landlord.
If you want to own rental property directly, $400,000 gives you strong purchasing power. Investment property lenders typically require around 30% down, meaning you could put $120,000 down on a $400,000 property and still have $280,000 to invest elsewhere. Or you could buy a lower-cost property outright with cash, eliminating mortgage payments and simplifying your cash flow. The tradeoff with direct ownership is that it demands your time: screening tenants, handling repairs, and managing vacancies.
Online real estate crowdfunding platforms sit between these two extremes. Minimums vary widely, from as low as $500 to $25,000 or more, with annual management fees typically around 1%. These platforms pool investor money into commercial or residential projects, but many lock up your capital for several years and are less liquid than publicly traded REITs.
Minimize Your Tax Bill
Tax efficiency matters more as your portfolio grows. On $400,000, even small tax savings compound into significant sums over time.
Start by maximizing any available tax-advantaged accounts. If you have access to a 401(k) with an employer match, contribute enough to capture the full match before investing elsewhere. Then fund an IRA (Roth if you’re eligible, traditional if not). If you’re self-employed, a SEP-IRA or solo 401(k) lets you shelter much larger amounts.
For money invested in a regular taxable brokerage account, asset location matters. Place bonds and REITs, which generate income taxed at ordinary rates, inside tax-advantaged accounts. Hold stock index funds in your taxable account, where long-term capital gains and qualified dividends get taxed at lower rates (0%, 15%, or 20% depending on your income).
Tax-loss harvesting is another tool worth using. When an investment in your taxable account drops in value, you can sell it to realize the loss, then buy a similar (but not identical) fund to maintain your allocation. Those realized losses offset capital gains elsewhere in your portfolio, and up to $3,000 in excess losses can offset ordinary income each year. During volatile markets, this strategy can save you thousands annually.
If you have capital gains to defer, qualified opportunity zone funds allow you to roll gains into investments in designated low-income communities. Hold the investment in a qualified rural opportunity fund for five years, and your original capital gains are reduced by 30% for tax purposes. This is a more specialized strategy, but it’s worth knowing about if you’re sitting on large realized gains from selling a business or property.
Consider Professional Help (and Know What It Costs)
You don’t need a financial advisor to invest $400,000 well, but the right one can earn their fee through tax planning, behavioral coaching, and comprehensive financial strategy. Here’s what you’ll pay.
Most advisors charge a percentage of assets under management. The median fee for a human advisor is about 1% per year, which on a $400,000 portfolio means $4,000 annually. Some charge as low as 0.30%, or $1,200 a year. Robo-advisors, which build and rebalance a portfolio automatically based on your risk profile, charge 0.25% to 0.50%, or roughly $1,000 to $2,000 per year on this amount.
If you’re comfortable managing your own portfolio and just want help with a one-time plan, many fee-only advisors will create a comprehensive financial plan for around $3,000, or consult on an hourly basis for $200 to $400 per hour. This approach gives you professional input on asset allocation, tax strategy, and retirement projections without the ongoing fee.
Whatever route you choose, look for a fiduciary, meaning someone legally required to act in your best interest rather than steer you toward products that pay them a commission.
A Sample $400,000 Portfolio
To make this concrete, here’s what a moderate-risk portfolio might look like for someone in their mid-40s with 20 years until retirement, investing primarily through a taxable brokerage account and a 401(k):
- U.S. total stock market index fund: $200,000 (50%) in the taxable account, where long-term gains get favorable tax treatment.
- International stock index fund: $80,000 (20%) in the taxable account, where you can claim the foreign tax credit on dividends.
- Total bond market index fund: $80,000 (20%) in the 401(k) or IRA, sheltering the interest income from taxes.
- REIT index fund: $20,000 (5%) in the 401(k) or IRA, since REIT dividends are taxed as ordinary income.
- Cash reserves: $20,000 (5%) in a high-yield savings account for emergencies and near-term spending.
This is one example, not a prescription. Your allocation should reflect your own timeline, income stability, and comfort with volatility. The important thing is to pick a sensible allocation, keep costs low, invest tax-efficiently, and then leave it alone except for periodic rebalancing once or twice a year.