Partial 1031 Exchange: Take Some Cash and Still Defer Taxes
10 min read · Planning & Execution · Last updated
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Key Takeaways
In a partial 1031 exchange, you can withdraw cash and still defer taxes on the amount you reinvest. The cash you take is taxable as "boot," but the reinvested portion qualifies for deferral. The key is meeting all exchange requirements for the deferred portion.
A partial 1031 exchange lets you defer tax on the portion you reinvest while taking cash (boot) on the portion you keep. You pay tax only on the boot. The rest is deferred.
This is a deliberate tradeoff, not a failure. When structured intentionally, a partial exchange gives you liquidity now and deferral on the rest.
How the tradeoff works
You sell investment property and receive net proceeds. You reinvest some of those proceeds in replacement property through a 1031 exchange. The remainder is returned to you as taxable boot.
The rule: You pay capital gains tax on the boot. You defer tax on the amount reinvested. Boot is taxable only up to your realized gain (you will never owe more tax from boot than you would have owed without any exchange).
Example 1: Deliberate cash-out
You sell a commercial building for $600,000 (basis $300,000, gain $300,000). You reinvest $500,000 in a replacement property and take $100,000 in cash.
| Component | Amount |
|---|---|
| Sale price | $600,000 |
| Basis | $300,000 |
| Realized gain | $300,000 |
| Amount reinvested | $500,000 |
| Boot (cash taken) | $100,000 |
| Tax owed (on boot, at 20% LTCG) | $20,000 |
| Tax deferred (on remaining gain) | $200,000 gain deferred = $40,000 saved |
You received $100,000 in liquidity and deferred $200,000 of gain. Without any exchange, you would have owed approximately $60,000 on the full $300,000 gain. With the partial exchange, you owe $20,000 and keep $80,000 net.
Example 2: Accidental boot from debt reduction
You sell a property worth $500,000 with a $150,000 mortgage (equity $350,000). You buy a replacement for $350,000 with no debt.
The IRS treats the $150,000 of mortgage relief as boot. Even though you reinvested all your equity, you did not replace the debt.
| Component | Amount |
|---|---|
| Sale price | $500,000 |
| Mortgage paid off at sale | $150,000 |
| Replacement property value | $350,000 |
| Debt on replacement | $0 |
| Mortgage boot | $150,000 |
| Tax owed (up to realized gain) | Depends on gain |
How to avoid accidental boot: Either take on equivalent debt on the replacement property or add personal cash to offset the debt reduction. Work with your QI and CPA to model the numbers before making offers.
When a partial exchange is the right choice
- You need liquidity. College tuition, home renovation, portfolio rebalancing. Taking some cash while deferring the rest is more tax-efficient than selling outright.
- You are downsizing. Moving from a larger property to a smaller one necessarily produces boot. Accept it deliberately and plan for the tax.
- You want to test a new market. Reinvest a portion in a new geography while taking some capital off the table.
- You have hit your portfolio target. You have built the portfolio you want. Pulling some capital out while deferring the rest is a rational endpoint.
All exchange rules still apply
A partial exchange follows the same structural requirements as a full exchange:
- QI must hold the proceeds
- 45-day identification deadline
- 180-day closing deadline
- Identification rules (3-Property, 200%, 95%)
- Same taxpayer on both sides
- Form 8824 filed with your return
The only difference is that some proceeds are returned to you as boot after the replacement property closes. Your QI holds all proceeds until then.
How to structure it
- Plan before the sale. Determine how much you want to take as boot and how much you will reinvest. Calculate the tax impact with your CPA.
- Tell your QI. Notify them this is a partial exchange. Provide the boot amount and reinvestment target.
- Close the sale. QI receives all proceeds.
- Identify replacement property. Within 45 days, identify property matching your reinvestment amount.
- Close on replacement. QI deploys the reinvestment portion.
- Boot is released. After replacement closing, QI releases the boot amount to you. You receive a 1099 for the boot at tax time.
Tax planning considerations
- Timing matters. Taking boot in a lower-income year (first year of retirement, for example) may result in a lower capital gains rate.
- Net investment income tax (NIIT). If your modified adjusted gross income exceeds thresholds ($200,000 single, $250,000 married filing jointly), the 3.8% NIIT applies to the boot.
- State taxes. Boot is subject to state capital gains tax in most states. Factor this into your planning.
The connection to boot
For a full explanation of boot types (cash boot, mortgage boot, hidden boot) and how they affect exchange calculations, see our boot guide.
The bottom line
A partial 1031 exchange is a tax-efficient way to take some cash while deferring the rest. The math is straightforward: boot is taxable, reinvestment is deferred. The key is making the split intentional, not accidental.
Plan the boot amount before you sell. Tell your QI and CPA. Follow all standard exchange rules. You get the best of both: liquidity now and deferral on the reinvested amount.
Ready to run the numbers? Try the 1031 tax savings calculator. Or connect with a qualified advisor to determine whether a partial exchange makes sense for your goals.
The Bottom Line
Partial exchanges let you balance liquidity needs with tax deferral. The math is straightforward: calculate what's taxable boot, reinvest the rest, and stay within all exchange rules for the deferred portion.
Frequently Asked Questions
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