⚠️ The 90-Day Rule — Most Important Thing to Know
The single most important rule for any financial windfall: do nothing for 90 days. Put the money in a high-yield savings account and don't touch it. Grief, guilt, and excitement are the worst financial advisors. Decisions made in the first weeks after receiving an inheritance are consistently the worst financial decisions people make in their lives. The money will still be there in 90 days. Your clarity of thinking will be dramatically better.
💰 How to Allocate a Windfall — A Framework
There is no one-size-fits-all allocation, but this framework provides a starting point for most situations.
| Priority | Action | Why |
|---|
| 1 — Always first | Eliminate all high-interest debt (above 8%) | Guaranteed return equal to the interest rate. Nothing beats this. |
| 2 — Essential | Complete 6-month emergency fund | A windfall without an emergency fund will be partially consumed by the next emergency. |
| 3 — High priority | Max all tax-advantaged accounts for the year | Roth IRA ($7,000), 401k, HSA — tax-free compounding multiplies the windfall's long-term value. |
| 4 — Core | Invest in low-cost index funds | Total market index funds, dollar-cost averaging over 6-12 months reduces timing risk. |
| 5 — Optional | Meaningful allocation for life goals | Down payment, business investment, education — aligned with your actual priorities. |
| 6 — Celebrate thoughtfully | A modest deliberate splurge (5-10%) | Acknowledging the gift without guilt. Sustainable generosity requires sustained wealth. |
📊 Lump Sum vs. Dollar-Cost Averaging
One of the most common questions about windfalls: should you invest it all at once or spread it out?
⚡
Lump Sum Investing
What the data says: Vanguard research found that lump sum investing outperforms dollar-cost averaging approximately 2/3 of the time over 12-month periods. Best for: Long time horizons, investors who can handle volatility, amounts under $500K. Risk: Poor timing in a market downturn can cause significant short-term paper losses and emotional regret.
📅
Dollar-Cost Averaging (DCA)
What it does: Invest a fixed amount monthly over 6-12 months. Best for: Very large windfalls (over $500K), people who experienced anxiety during previous downturns, amounts that would significantly change your portfolio composition. DCA sacrifices some expected return for significantly reduced regret risk — a real psychological benefit worth paying for.
💡 The Practical Recommendation
For most people with windfalls under $200,000: lump sum invest after your 90-day reflection period. For windfalls over $200,000 or for people who experienced significant market anxiety in 2020 or 2022: dollar-cost average over 6-12 months. The mathematically optimal choice is lump sum. The emotionally sustainable choice may be DCA. You need to stay invested — choose the approach that lets you sleep at night.
❓ Inheritance FAQ
Do I owe taxes on an inheritance?+
Generally, you do not owe federal income tax on inherited money or property itself — it is not income. However: (1) Any income the inherited assets generate after you receive them IS taxable. (2) Inherited IRAs and 401ks are taxed as ordinary income when you withdraw. (3) Six states have inheritance taxes (Iowa, Kentucky, Maryland, Nebraska, New Jersey, Pennsylvania). The federal estate tax applies only to estates over $13.61 million in 2025.
What is the stepped-up cost basis and why does it matter?+
When you inherit assets (stocks, real estate), your cost basis "steps up" to the fair market value at the date of the decedent's death — regardless of what they originally paid. If your parent bought stock for $10,000 and it was worth $100,000 when they died, your basis is $100,000. If you sell immediately, you owe zero capital gains tax. This is one of the largest tax advantages available and a reason to consider inheriting appreciated assets as long-term investments.
What are the rules for an inherited IRA?+
Under SECURE 2.0 (2020): Non-spouse beneficiaries generally must distribute the entire inherited IRA within 10 years of the original owner's death. Spouses have more flexible options including rolling it into their own IRA. The distributions are taxed as ordinary income when taken. A CPA can help you optimize the timing of distributions across the 10-year window to minimize total tax impact.
Should I tell people about my inheritance?+
Be very careful. Research consistently shows that unexpected financial windfalls damage relationships when widely disclosed. Extended family, friends, and even some professional advisors may make claims on your windfall — emotional, social, or financial. Disclose to your spouse/partner and perhaps one trusted financial advisor. Beyond that, privacy is a financial protection strategy, not just a personal preference.