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A little clarity for your next decision.
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Investor WorkspaceA little clarity for your next decision.
By Jerry Baker
The tax a 1031 exchange defers depends on your gain, the amount recognized now, and your full tax picture. It is not a fixed percentage of the sale price or the money held by your intermediary. This guide uses a dated federal example to show how to compare a taxable sale, a full exchange, and a partial exchange.
The most useful estimate compares the same year's tax return under two choices. One shows the planned taxable sale. The other shows the proposed exchange. The difference estimates current tax deferral under those assumptions.
That approach is better than multiplying the sale price by a large combined rate. The property may have a high basis, a small gain, or gain that falls into several tax categories.
I would ask your CPA for the difference in dollars and for a list of assumptions that could change it. A clear range may be more useful than a precise-looking number built on missing records.
Keep future tax separate. The comparison shows current tax timing, not a promise that the deferred gain will never be taxed. Replacement basis carries the effect of the exchange. [1]
Start with the contract price, estimated sale costs, adjusted basis, and mortgage payoff. Then add the proposed replacement price, new debt, cash added, and cash retained.
For the tax side, identify filing status, tax year, other income, capital losses, prior depreciation, and relevant state facts. The investor's age, deductions, credits, and other return items may also affect the full calculation.
Basis needs records. It may reflect original cost, capital improvements, depreciation, prior exchanges, and other adjustments. The loan balance is not a substitute for that history. [2]
Mark each figure as final, estimated, or unknown. An unknown basis is a reason to research the records before committing to a tax estimate.
Also identify what is being sold. This guide's main example uses investment land to avoid depreciation and recapture complications. A rental building with equipment requires additional work.
The following original example is hypothetical. It illustrates regular federal capital-gain tax and net investment income tax, or NIIT. It is not a complete tax return or a recommendation.
Assume a married couple files jointly for 2026. Both are under age 65 and qualify for the basic standard deduction. They have $112,200 in wages and no other income before the property transaction.
They sell investment land held longer than one year for $1,000,000. Its adjusted basis is $600,000, and the loan payoff is $200,000. To keep the example clear, assume no selling costs, no depreciation, no losses, and no other tax adjustments.
Assume the gain is ordinary long-term capital gain eligible for the usual preferential rates, rather than a special gain category. It is fully included in net investment income. The example excludes state taxes, alternative minimum tax, credits, and other provisions that a real return might require.
With the 2026 joint standard deduction of $32,200, ordinary taxable income before the sale is $80,000. The IRS's 2026 joint capital-gain thresholds are $98,900 for the top of the 0% range and $613,700 for the top of the 15% range. [3]
The land's gain is $1,000,000 minus $600,000, or $400,000. Cash after the loan payoff is $800,000. These are different figures serving different purposes.
| Item | Amount | What it tells us |
|---|---|---|
| Sale price | $1,000,000 | Value received before assumed adjustments |
| Adjusted basis | $600,000 | Tax investment remaining in the property |
| Realized gain | $400,000 | Amount to analyze for tax recognition |
| Loan payoff | $200,000 | Cash used to discharge debt |
| Cash before income tax | $800,000 | Equity available before income tax and other costs |
The mortgage payoff does not reduce this example's $400,000 gain. The general sale calculation compares amount realized with adjusted basis. [4]
In an actual transaction, the CPA must classify costs and adjustments. Do not copy this no-cost example onto a closing statement with commissions, prorations, financing charges, and credits.
For this simple example, the capital gain sits above the $80,000 of ordinary taxable income. That leaves $18,900 of room in the 0% range: $98,900 minus $80,000.
The remaining $381,100 of the $400,000 gain falls in the 15% range. Total taxable income is $480,000, below the $613,700 upper limit for that range.
The modeled regular federal tax on the gain is therefore $57,165: $381,100 multiplied by 15%. The first $18,900 adds no regular capital-gain tax under these assumptions.
This stacking method follows the preferential-rate framework. The IRS worksheets coordinate gains with ordinary taxable income and other preferential items. [5] Qualified dividends, special gain categories, or capital losses would require a more detailed calculation.
Multiplying all $400,000 by 15% would produce $60,000, which is $2,835 too high for this specific example. Multiplying the $1,000,000 sale price by 15% would be much further off.
For individuals, NIIT generally equals 3.8% of the lesser of net investment income or modified adjusted gross income above the filing-status threshold. The joint-filer threshold is $250,000. [6]
In this example, modified adjusted gross income is $512,200: $112,200 wages plus $400,000 gain. Do not subtract the standard deduction in this step. That deduction helped calculate taxable income, which is a different measure.
Income above the NIIT threshold is $262,200. That is less than the assumed $400,000 of net investment income, so the NIIT base is $262,200.
At 3.8%, modeled NIIT is $9,963.60. Added to $57,165 of regular capital-gain tax, the two modeled federal components total $67,128.60.
The effective rate across the $400,000 gain is about 16.78%. This is the result of the stated facts, not a general rate for real estate investors.
Now assume the same land is transferred through a valid full 1031 exchange. The $800,000 equity and $200,000 of replacement debt acquire $1,000,000 of qualifying replacement real estate. There is no cash received or other recognized gain.
Assume all exchange requirements are satisfied. The $400,000 realized gain is deferred. Section 1031 governs the qualifying nonrecognition; the deferred amount affects replacement basis. [7]
With no recognized transaction gain in this example, the modeled $67,128.60 of current federal tax on that gain is deferred. Ordinary tax on the wages still exists; it is not being erased or counted as an exchange benefit.
The replacement basis is $600,000 before other adjustments: $1,000,000 value less $400,000 deferred gain. The investment has not acquired a fresh $1,000,000 tax basis. [1]
The taxable-sale path would leave $732,871.40 of the original $800,000 cash after the two modeled federal taxes. The exchange path keeps $800,000 of equity invested before any differing transaction costs.
Consider a partial exchange of the same land. The investor receives $50,000 cash and acquires $950,000 of qualifying replacement property with $750,000 equity and $200,000 debt.
Under the example's no-recapture and no-cost assumptions, recognized gain is $50,000 and deferred gain is $350,000. Replacement basis remains $600,000: $950,000 less $350,000. Actual partial exchanges require the cash and liability calculation. [1][8]
The first $18,900 of recognized gain still fits the modeled 0% range. The next $31,100 is taxed at 15%, producing $4,665 of regular capital-gain tax.
Modified adjusted gross income is now $162,200, below the joint NIIT threshold. Modeled NIIT from the transaction is zero.
The current modeled federal tax difference from a fully taxable sale is $62,463.60: $67,128.60 minus $4,665. The investor keeps $45,335 of the $50,000 cash after that modeled tax.
This partial exchange defers 87.5% of the gain, yet it defers a different percentage of the modeled current tax. The brackets and NIIT threshold explain why a simple proportional shortcut can fail.
| Measure | Taxable sale | Full exchange | Partial exchange |
|---|---|---|---|
| Recognized gain | $400,000 | $0 | $50,000 |
| Deferred gain | $0 | $400,000 | $350,000 |
| Modeled regular federal gain tax | $57,165 | $0 | $4,665 |
| Modeled NIIT | $9,963.60 | $0 | $0 |
| Current modeled federal tax difference versus sale | $0 | $67,128.60 | $62,463.60 |
| Replacement equity invested | Not specified | $800,000 | $750,000 |
| Replacement basis | Not applicable | $600,000 | $600,000 |
Do not read the table as a ranking. The full exchange leaves more equity committed to real estate. The partial exchange leaves some spendable cash. The taxable sale leaves flexibility to choose a different use for the proceeds.
The right comparison depends on what you need that money to do. A tax number cannot answer that question by itself.
Keep the same $400,000 land gain and the example's other assumptions, but increase ordinary taxable income before the sale. For this exercise, wages remain the only other income, and the basic standard deduction remains $32,200.
At $200,000 of ordinary taxable income, all $400,000 of gain falls in the 15% range. Regular gain tax is $60,000. Modified adjusted gross income becomes $632,200, making the NIIT base $382,200 and NIIT $14,523.60.
The two modeled federal components total $74,523.60. That is $7,395 more than the original lower-income example, even though the property, sale price, and basis have not changed.
At $300,000 of ordinary taxable income, $313,700 of gain falls in the 15% range and $86,300 in the 20% range. Regular gain tax is $64,315. The full $400,000 is within the NIIT base, adding $15,200, for $79,515 total.
These sensitivities show why I would ask for a full-year income estimate. A property-only worksheet cannot know what the rest of your year looks like.
Return to the original $80,000 ordinary-taxable-income case. Suppose records establish a $700,000 adjusted basis instead of $600,000, with no other changes. Gain falls from $400,000 to $300,000.
Under the same simplified assumptions, regular gain tax becomes $42,165. NIIT becomes $6,163.60. Total modeled federal tax is $48,328.60, or $18,800 less than the first estimate.
This does not mean you can choose a higher basis. It means the records matter. Missing improvements, an old exchange, or an incorrect depreciation history can materially distort the comparison.
Ask the preparer to reconcile basis before relying on the estimate. Keep unsupported amounts labeled as unresolved, even if they make the projected tax bill look better.
The land example deliberately leaves out depreciation. A rental sale can include ordinary recapture, unrecaptured Section 1250 gain, and Section 1231 gain subject to its own rules. Those amounts cannot all be dropped into the land example's 0%, 15%, and 20% calculation. [4][5]
Ask for an asset-level schedule showing land, building, improvements, and equipment where relevant. A cost-segregation study can make that detail especially important.
Also review what the exchange receives. Form 8824 includes ordinary-recapture rules that can require recognition even when the usual cash-out calculation looks favorable. [1]
I would keep the simple example as a teaching tool, then replace it with the actual asset history. Simplicity is useful until it removes a fact that changes the result.
Capital losses and carryforwards affect the annual gain calculation. Passive losses have different limits and release rules, so a taxable sale and an exchange can have different effects on them. [5][9]
Do not assume the same loss amount is available in both columns. Ask the CPA to determine which losses can be used under each path and which remain carried forward.
For planning, keep a list of effects outside the simple gain calculation: credits, deductions, income-based provisions, alternative minimum tax, and other relevant taxes or costs. Mark which have been modeled.
A large stated gain can coexist with a modest current tax bill if other valid offsets apply. Conversely, a small recognized amount can trigger more than its stand-alone rate suggests. The full-return comparison resolves those questions.
State tax belongs in the comparison, but not as an unexplained flat surcharge. Confirm residency, property source, exchange treatment, state basis, and applicable filing obligations.
California's specified out-of-state replacement exchanges can require ongoing Form FTB 3840 reporting. Changing the location of the replacement does not automatically eliminate tracked California-source deferred gain. [10]
After calculating taxes, compare the cash cost of carrying out each option. Include actual exchange, legal, and investment-related charges. Ask the tax pro how each charge is treated rather than assuming every fee reduces gain.
The number you want is understandable: current tax difference, less differing cash costs, with future tax and investment risk shown separately. It is a decision model, not a guaranteed return.
In the full-exchange example, replacement value is $1,000,000 and basis is $600,000. These numbers do not conflict. One describes an assumed transaction value; the other records the investment for tax purposes.
A lender, buyer, and tax preparer may use different figures for different jobs. Label each one. Do not enter the $600,000 basis as the property value in a loan-to-value calculation, or use the $1,000,000 value as fresh depreciable basis.
For the assumed $200,000 replacement loan and $1,000,000 value, loan-to-value is 20%. Dividing by the $600,000 tax basis would produce about 33.3%, but that is not the same measure.
The example uses a married couple's joint individual return. Do not assume it describes a corporation, trust, estate, or partnership transaction.
Before using a calculator, identify the taxpayer selling the asset and the taxpayer expected to acquire the replacement. Ask the advisers whether title, ownership, and any proposed changes support the intended exchange.
If several owners have different cash needs, build separate planning questions for each. One owner's desire to reinvest does not answer another owner's tax or liquidity question.
A shared property spreadsheet can help organize facts. It should not silently decide a complex ownership issue that needs legal and tax review.
Ask the preparer to mark the version used for the final decision. Then compare it with the signed closing documents. If a number changes, rerun the affected part before treating the earlier estimate as settled.
First, identify the facts that drive the answer. In the example, those are basis, recognized gain, ordinary income, and filing status. In your case, asset character or a prior exchange may matter more.
Second, test a few realistic changes. What if the sale price drops? What if you need more cash? What if the replacement loan is smaller? Have the CPA rerun the affected calculation.
Third, compare the investment choices. The largest deferral is not automatically the best fit. You may need income, reserves, lower debt, or more control over future decisions.
Finally, keep the estimate dated. Update it when actual sale terms, tax facts, or replacement choices change. An early worksheet should not become a closing instruction by accident.
No. The current tax difference depends on recognized gain, tax character, other income, losses, filing status, states, and other return items. Compare the actual taxable-sale and exchange scenarios rather than applying one rate to the price.
Not simply because the loan is paid at closing. Debt affects cash proceeds and the exchange's liability calculation. Gain generally compares amount realized with adjusted basis, using the appropriate sale adjustments. [4][8]
Regular capital-gain brackets use taxable income. NIIT uses modified adjusted gross income and net investment income. Those are different measures. The example separates them so the $32,200 deduction is not incorrectly used to reduce the NIIT threshold calculation. [3][6]
Not necessarily. Deferring part of the gain can move the remaining recognized amount across rate bands or income thresholds. The example shows why the percentage of gain deferred and percentage of current tax deferred may differ.
Not without adjustments. The main case uses investment land with no depreciation. Buildings and other assets may create recapture and special gain categories. Ask your CPA to use the actual asset and depreciation records. [1][4]
No automatic permanent exclusion is created by the exchange. Deferred gain affects replacement basis and can matter at a later taxable disposition. The current-year comparison should be paired with an exit and basis review. [7]
Gather purchase records, improvements, depreciation schedules, and prior exchange returns. Ask your tax pro to reconstruct and document basis. Use a clearly labeled range until the records support a final figure. [2]
Only after considering the rest of the decision. Cash needs, investment quality, debt, fees, and access to money matter too. A sound plan should explain both the tax result and the reason the investment fits.
Educational information, not an offer or a personal tax, legal, or investment recommendation. Examples are hypothetical and omit stated adjustments. Tax treatment depends on your facts and current law. Review your transaction with your CPA, attorney, and qualified intermediary. Real estate investments can lose value and may be illiquid.
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