Definition
Unadjusted basis immediately after acquisition is a Section 199A measurement for tangible, depreciable property held by and available for use in a qualified trade or business at year-end. It generally starts with placed-in-service basis without subtracting later depreciation, but transfer, improvement, and partnership-basis rules can change the amount.
Where UBIA fits in the QBI formula
When the wage-and-property limit fully applies, the QBI component for a trade or business is generally constrained by the greater of these two amounts, before the separate taxable-income limitation:
Wage-only path
50%
of allocable W-2 wages
Wages + property path
25% + 2.5%
of W-2 wages + UBIA of qualified property
That greater amount is compared with 20% of qualified business income. During the taxable-income phase-in range, the limitation is only partially applied. Specified service trade or business rules add another layer, although a qualifying rental real-estate business is not an SSTB merely because it owns real estate.
When UBIA matters in 2026
For 2026, the wage/UBIA limitation begins to phase in above the following taxable-income thresholds, measured before the QBI deduction. The execution brief’s $201,775 figure applies to married filing separately, not all single filers.
| Filing status | 2026 threshold | Full-limit point |
|---|---|---|
| Married filing jointly | $403,500 | $553,500 |
| Married filing separately | $201,775 | $276,775 |
| All other returns | $201,750 | $276,750 |
What counts as qualified property
- Tangible property subject to depreciation under Section 167
- Held by and available for use in the qualified trade or business at year-end
- Used to produce QBI during the tax year
- Still inside the Section 199A depreciable period
- Supported by basis and placed-in-service records
- Allocated to the correct trade, business, owner, or aggregation
Land does not count. Land is not depreciable, so a purchase-price allocation that overstates the building can overstate both depreciation and the property amount used in the Section 199A analysis.
Worked example: a rental business with no W-2 wages
| Qualified business income | $300,000 |
| 20% tentative QBI amount | $60,000 |
| W-2 wages | $0 |
| UBIA of qualified property | $2,000,000 |
| 50% wage path | $0 |
| 25% wage + 2.5% UBIA path | $50,000 |
| QBI component after wage/UBIA limit | $50,000 |
The example assumes the full limitation applies, the activity produces QBI, the property is qualified, and there are no aggregation, SSTB, loss, patron, REIT/PTP, or overall taxable-income limitations. It illustrates the formula, not a promised deduction.
The depreciable-period rule
Qualified property stays in the UBIA calculation only while its Section 199A depreciable period remains open. That period generally ends on the later of ten years after the property was first placed in service or the last day of the last full year in the property’s applicable Section 168 recovery period.
Cost segregation creates a tracking issue. Reallocating basis to 5-, 7-, and 15-year assets does not increase total basis. It can cause shorter-life components to leave the UBIA pool earlier than the long-life building, so the depreciation and Section 199A schedules should reconcile.
Special basis cases
These are not safe places for a shortcut. The final regulations include transaction-specific rules, and the right number can differ by owner.
Like-kind exchange
Carryover and excess basis can have separate placed-in-service and UBIA consequences. Do not substitute the replacement property’s purchase price for the regulation’s calculation.
Section 743(b) adjustment
A transferee partner’s special basis adjustment may receive separate UBIA treatment when the regulatory conditions are met. It is partner-specific, not entity-wide UBIA for everyone.
Section 351 or 721 contribution
Carryover-basis transfers require special attention to predecessor basis, placed-in-service history, and the remaining depreciable period.
Gifted or inherited property
The income-tax basis rules and Section 199A regulations determine the result; neither current market value nor the prior owner’s number is automatically correct in every case.
Home-office property
Only the qualifying depreciable portion used in the trade or business can enter the analysis, and mixed personal/business use requires supportable allocation.
Property sold before year-end
Qualified property generally must be held and available for use in the qualified trade or business at the close of the tax year.
Frequently asked questions
What does UBIA stand for?
UBIA means unadjusted basis immediately after acquisition. For Section 199A, it is generally the basis of qualifying depreciable property when first placed in service, measured before later depreciation adjustments, subject to special transfer and improvement rules.
Does depreciation reduce UBIA?
Regular depreciation does not reduce UBIA because the measure is unadjusted basis. The property can still stop being qualified property when its Section 199A depreciable period ends or another eligibility condition is no longer met.
Is land included in UBIA?
Land is not depreciable property, so land basis is not qualified-property UBIA. A supported allocation between land and depreciable building or improvements is therefore important.
When does the UBIA limitation matter?
It generally matters when taxable income is above the Section 199A threshold and the W-2 wage/UBIA limitation is being phased in or fully applied. Below the threshold, the limitation generally does not reduce the QBI component.
How long does property count for UBIA?
Qualified property must remain within its depreciable period, which generally ends on the later of ten years after it was first placed in service or the last day of the final full year in its applicable Section 168 recovery period.
Does a cost segregation study increase total UBIA?
A study reallocates depreciable basis among asset classes; it does not create new total basis. It can change which assets are tracked and when shorter-life components leave their depreciable periods, so the fixed-asset and UBIA schedules should be coordinated.
Primary sources
Tie UBIA to the fixed-asset ledger
Taxstra can reconcile placed-in-service basis, property transfers, cost segregation, W-2 wages, and the QBI calculation before a return turns a tracking issue into a missed deduction.
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