Unlevered helps CPAs turn missed depreciation into client tax savings — without refinancing, selling, or amending prior-year returns. Marcus Brennan, a nurse in Austin with a 5-year-old rental, is one example.
Marcus is a nurse in Austin making about $150K a year. Five years ago, he bought a 3-bedroom long-term rental and placed it in service the same month. It produces about $30K of taxable passive income this year.
He's been depreciating it on the standard 27.5-year schedule — never accelerated, never cost-segregated. His CPA didn't just ask, "How big is the deduction?"
The real question was: how much of the catch-up can Marcus use this year?
Six checks in order. Each one moves the deduction closer to cash. The §469 passive activity rules cap how much can be used this year — the rest carries forward on Form 8582 as a future tax asset.
| Step | What happened | What this unlocks |
|---|---|---|
| 01 | Marcus held the rental 5 years on standard SL depreciation | $90,909 already claimed |
| 02 | CPA ran lookback cost seg → $500K basis reclassified into 5-, 15-, 27.5-year buckets | Premium 33% short-life identified |
| 03 | §481(a) catch-up = corrected depreciation through year 5 minus what was claimed | $135,000 catch-up |
| 04 | Form 3115 filed with this year's return — method change, automatic IRS consent | No amended prior returns |
| 05 | Rental produced $30K of passive income; §469 caps usable at that amount | $30K usable now |
| 06 | Balance carries forward on Form 8582 until passive income or §469(g) disposition | $105K future tax asset |
Usable this year: $30,000
Federal tax rate: 24%
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Federal tax saved: $7,200
Carries forward: $105,000
~Future tax value at 24%: ~$25K
Marcus owns the rental and reports it on Schedule E — but he never accelerated depreciation. Like most LTR owners, he was on the standard 27.5-year straight-line method. A lookback cost seg unlocks the depreciation he could have taken on the 5- and 15-year components since day one. That's the $135K. After the catch-up, the building shell keeps depreciating for the next 22.5 years.
Marcus has been taking standard depreciation: $500K straight-line over 27.5 years = $18,182 per year. Over five years, that's about $90,909. With cost seg done at original purchase, he should have taken $225,909 by now — bonus on the short-life components plus straight-line on the shell. The catch-up is the gap.
What Marcus took (5 yrs SL on whole basis): $90,909
What he should have taken (5 yrs w/ cost seg):
$165K bonus on 5-yr + 15-yr at original PIS +
5 yrs SL on $335K shell ($60,909) = $225,909
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§481(a) catch-up (the gap, lands this year): $135,000
And after the catch-up? The 5- and 15-year components are fully deducted. The $335K shell keeps depreciating straight-line for the next 22.5 years — about $12,200/year, ~$275K more in total. Cost seg doesn't add extra deduction beyond the basis; it pulls timing forward.
Marcus's passive income isn't his nurse salary — it's the taxable income from the rental itself. This year, the rental produces $30K. The §469 passive activity rules cap the usable deduction at the passive income available. The portion that exceeds that cap doesn't disappear; it carries forward on Form 8582 indefinitely as a future tax asset.
Usable deduction this year = lesser of (catch-up, passive income) §481(a) catch-up: $135,000 Passive rental income: $30,000 ───────────────────────────────────── Usable this year: $30,000 Carried forward: $105,000
The study finds the deduction. The CPA uses it on the return. The platform answers the questions in between — and tracks the answers year over year so nothing slips between filings.
The engine produces the Form 3115 method-change filing with the §481(a) computation pre-populated. No re-opening of prior years. Automatic IRS consent applies.
What can't be used this year shows up next year as prior-year unallowed losses. The engine tracks the carryforward across filings and releases it on passive income or §469(g) disposition.
Usable next to carried-forward, same view. CPAs set client expectations before March — no surprise conversation after the return ships.
The carryforward sits next to upcoming passive income, planned acquisitions, and exit scenarios. The CPA sees the full multi-year arc, not just this year's return.
Adjust the depreciable basis, years held, passive rental income available, and marginal rate. The estimator computes the §481(a) catch-up, the usable portion this year, and what carries forward. Illustrative only — actual studies depend on engineered component analysis.
Run the study, show the usable deduction, and give the client a clear savings story with the audit trail behind it.