Week 43 Day 4: The Step-Up in Basis at Death: The Ultimate Tax Strategy

You buy VTI for $100,000 in 1995. By 2025, it is worth $1,000,000. You have $900,000 in unrealized gains. If you sell, you owe approximately $135,000-$213,000 in capital gains tax. If you never sell and die in 2025, your heirs receive the VTI with a $1,000,000 cost basis. They can sell the next day and owe approximately $0 in capital gains tax. The $900,000 gain disappeared. This is why wealthy investors often follow the 'never sell' strategy.

Step-up in basis details: (1) The basis resets to the fair market value on the date of death (or the alternate valuation date, 6 months later, if the estate elects). (2) It applies to ALL inherited assets: stocks, bonds, ETFs, real estate, business interests. (3) It applies regardless of the size of the unrealized gain. A $10 million unrealized gain? Stepped up. Tax eliminated. (4) It applies to assets held in taxable accounts ONLY. Traditional IRA/401(k) assets do NOT get a step-up (withdrawals are still taxed as ordinary income to heirs). Roth IRA assets are already tax-free, so the step-up is irrelevant. Planning implications: (a) Hold highly appreciated assets in taxable accounts until death if you do not need the money. Do NOT sell and move to cash -- you would trigger unnecessary capital gains tax. (b) If you must sell some appreciated assets, sell the ones with the SMALLEST gains (highest cost basis). Keep the largest gains for the step-up. (c) Donate appreciated stock to charity instead of cash. You avoid capital gains tax AND get a full fair-market-value deduction. This is strictly better than selling the stock, paying capital gains tax, and donating the after-tax proceeds. (d) Your asset location strategy should consider the step-up: keep appreciated stock funds (VTI) in taxable accounts (where heirs get the step-up), and keep bonds in IRAs (where the step-up does not apply anyway). (e) For real estate investors: the step-up eliminates gains on rental properties AND reverses all depreciation recapture. A property with $300,000 in accumulated depreciation deductions has a $0 basis -- but at death, the basis steps up to market value, permanently eliminating the depreciation recapture tax.

The step-up in basis at death (IRC Section 1014) is arguably the largest tax benefit in the U.S. tax code, disproportionately benefiting holders of highly appreciated assets. The Joint Committee on Taxation estimated the revenue cost of the step-up at approximately $41 billion per year (2024). The step-up transforms the capital gains tax from a tax on asset appreciation into a tax on asset appreciation that is REALIZED during the taxpayer's lifetime. For assets held until death, the effective capital gains tax rate is 0%. This creates the 'buy, borrow, die' strategy used by ultra-high-net-worth individuals: (1) Buy appreciated assets (stocks, real estate). (2) Borrow against the assets (margin loans, securities-backed lines of credit) to fund consumption without selling (no capital gains tax). (3) Die with the assets, eliminating all gains via the step-up. The heirs inherit the assets at stepped-up basis, repay the loans (tax-free, since loan repayment is not income), and the cycle repeats. For moderate-wealth investors, the practical takeaway is simpler but still valuable: (a) prioritize holding appreciated assets until death when possible, (b) donate appreciated assets to charity instead of cash, (c) use tax-loss harvesting and Roth conversions to manage taxes during life (strategies that are complementary to the step-up, not substitutes), and (d) be aware that the step-up may be modified or eliminated by future legislation (it has been proposed for elimination in multiple recent tax reform proposals). If the step-up were replaced by a carryover basis regime (where heirs inherit the original cost basis), the planning calculus would shift significantly toward lifetime realization strategies.