Buy, Borrow, Die Calculator
Analyze the long-term wealth-building strategy used by affluent investors. This tool helps you model how buying appreciating assets, borrowing against them for liquidity, and passing them to heirs can impact generational wealth.
What is the Buy, Borrow, Die Strategy?
The “Buy, Borrow, Die” strategy is a financial planning technique primarily used by high-net-worth individuals to manage wealth, access liquidity, and minimize taxes over the long term. It involves three core steps: buying appreciating assets, borrowing against their value to fund lifestyle expenses, and then, upon death, passing those assets to heirs with significant tax advantages. This approach hinges on the principle that it can be more beneficial to pay loan interest than to trigger capital gains taxes by selling assets. The cornerstone of the “die” phase is the “step-up in basis,” a provision in the U.S. tax code that resets the cost basis of an inherited asset to its fair market value at the time of death, often erasing a lifetime of taxable capital gains.
The Buy, Borrow, Die Formula and Explanation
While not a single formula, the strategy is a year-over-year process. Our buy borrow die calculator models this by simulating the interaction between asset growth and accumulating debt. The core components are:
- Asset Growth: Your portfolio grows at an assumed annual rate. `NewAssetValue = OldAssetValue * (1 + AnnualGrowthRate)`
- Borrowing: Each year, you borrow money for expenses, adding to your loan. `AmountBorrowed = AnnualLivingExpenses`
- Loan Compounding: The outstanding loan balance accrues interest. `NewLoanBalance = (OldLoanBalance + AmountBorrowed) * (1 + LoanInterestRate)`
This cycle repeats for the duration of the simulation. A critical constraint is the Loan-to-Value (LTV) ratio; your loan balance must not exceed a set percentage of your asset value to avoid a margin call. For deeper insights, you might explore an estate planning guide.
Variables Table
| Variable | Meaning | Unit | Typical Range |
|---|---|---|---|
| Initial Asset Value | The starting value of your investment portfolio. | Currency ($) | $500,000+ |
| Annual Asset Growth Rate | The average yearly appreciation of your assets. | Percentage (%) | 5% – 12% |
| Annual Living Expenses | The cash needed per year, covered by borrowing. | Currency ($) | Varies |
| Loan Interest Rate | The rate on your portfolio line of credit. | Percentage (%) | 2% – 7% |
| Max LTV Ratio | The maximum loan balance allowed relative to asset value. | Percentage (%) | 25% – 50% |
Practical Examples
Example 1: Successful Scenario
An investor starts with a $2,000,000 portfolio, which grows at 8% annually. They borrow $80,000 per year for living expenses at a 4% interest rate. After 30 years, their assets could grow to over $20 million. Even with a loan balance of around $4.5 million, the net estate passed to heirs is approximately $15.5 million. The heirs inherit the assets with a cost basis of $20 million, wiping out decades of capital gains.
Example 2: A Risky Scenario
Consider the same $2,000,000 portfolio, but asset growth is only 5% while the loan rate is 6%. The smaller spread between growth and interest significantly erodes the final estate value. If the market experiences a severe downturn, the asset value could fall, potentially triggering a margin call if the loan balance exceeds the maximum LTV threshold, forcing the sale of assets and realizing capital gains at an inopportune time. This highlights the importance of understanding capital gains.
How to Use This Buy, Borrow, Die Calculator
- Enter Initial Asset Value: Start with the current market value of your investments.
- Set Growth & Loan Rates: Input your expected annual asset growth and the interest rate for your portfolio loan. The spread between these two numbers is a key driver of the outcome.
- Define Expenses & LTV: Specify how much you need to borrow annually and the maximum LTV your lender allows. A lower LTV provides a larger safety buffer.
- Run the Simulation: Enter the time horizon in years and click “Calculate”.
- Interpret Results: Analyze the final net estate value, the year-by-year table, and the chart to see how your assets and debt evolve over time. Use our net worth calculator to track your progress.
Key Factors That Affect the Buy, Borrow, Die Strategy
- Asset Growth vs. Loan Interest Spread: The strategy is most effective when your assets grow significantly faster than your loan interest accrues. A narrow or negative spread can quickly lead to failure.
- Step-Up in Basis: This tax law is the linchpin of the “Die” phase. Any changes to this rule could dramatically reduce the strategy’s effectiveness. It’s a key part of many wealth management strategies.
- Market Volatility: Sudden drops in asset value can trigger a margin call, forcing you to sell assets and realize gains. Maintaining a low LTV is a crucial risk management tool.
- Loan Terms: Access to low-interest, flexible credit lines (like a portfolio line of credit) is essential. High interest rates can cripple the strategy.
- Tax Law Changes: The entire strategy is built on current tax regulations. Future changes to capital gains taxes, estate taxes, or the taxability of loans could alter its viability.
- Longevity: Living longer than anticipated means borrowing for more years, leading to a larger loan balance that could potentially overwhelm asset growth if not managed carefully.
Frequently Asked Questions (FAQ)
1. Is the Buy, Borrow, Die strategy legal?
Yes, it is completely legal. It uses existing provisions within the U.S. tax code, such as the non-taxability of loan proceeds and the step-up in basis at death, to optimize wealth transfer.
2. What is the biggest risk of this strategy?
The primary risk is a “margin call.” If the value of your assets falls significantly, your loan-to-value ratio might exceed the lender’s threshold, forcing you to sell assets at a low price to pay down the loan, thereby locking in losses and triggering capital gains tax.
3. Do I need to be a billionaire to use this?
No, but it is generally most effective for individuals with substantial appreciating assets (e.g., $1 million or more in a taxable brokerage account or real estate) who can secure favorable loan terms. The benefits are less pronounced for smaller portfolios.
4. What happens to the loan when you die?
The loan does not disappear. It becomes a liability of the estate. Typically, the heirs will sell a portion of the inherited assets to pay off the loan. Because of the step-up in basis, this sale usually incurs little to no capital gains tax.
5. Can I use this strategy with real estate?
Absolutely. Real estate is a common asset for this strategy. You can borrow against a property’s appreciated value using a cash-out refinance or a home equity line of credit (HELOC) instead of selling it.
6. What is a “step-up in basis”?
“Step-up in basis” is a tax provision that adjusts the cost basis of an inherited asset to its fair market value on the date of the original owner’s death. This eliminates capital gains tax on all the appreciation that occurred during the deceased’s lifetime.
7. Why is borrowing better than selling?
Loan proceeds are not considered taxable income. By borrowing, you access cash without selling an asset and triggering a taxable event (capital gains tax). This allows your assets to remain invested and continue appreciating.
8. What is a good loan-to-value (LTV) ratio to maintain?
Most wealth managers advise keeping the LTV ratio below 25-40%. While some lenders may allow up to 50% or more, a lower LTV provides a critical safety buffer against market downturns and reduces the risk of a margin call.
Related Tools and Internal Resources
Explore these resources for a more comprehensive financial plan:
- Estate Planning Tools: Discover more strategies for efficient wealth transfer.
- Tax Minimization: Learn about other legal methods to reduce your tax burden.
- Financial Independence Calculator: See how different strategies can impact your retirement timeline.