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Cost Seg Benefit Calculator
Cost segregation studies reclassify 15-30% of building basis from 27.5/39-year property into shorter 5/7/15-year recovery classes — carpet, appliances, fixtures, land improvements. Combined with bonus depreciation, this delivers significant first-year tax acceleration. This calculator computes net benefit (tax saved minus study cost) and ROI.
5/7/15 yr property
Tax year - check phase-down
Net first-year benefit
$7,200
First-year tax savings
$19,200
First-year accelerated deduction
$60,000
Study ROI %
60.00%
How the math works
Cost segregation studies reclassify 15-30% of building basis from 27.5/39-year property into shorter 5/7/15-year recovery classes (carpet, appliances, land improvements). Combined with bonus depreciation, this can deliver 5-10x first-year deduction acceleration.
Studies cost $4K-25K depending on property complexity. Often pay for themselves 5-15x in first year on properties over $500K.
EveryCalc calculators are designed for fast, practical estimates with transparent inputs and no required account. We use plain formulas, visible assumptions, and related tools so visitors can check the result from more than one angle.
Results are informational only. For financial, tax, legal, medical, construction, or other high-impact decisions, verify the output against primary sources or a qualified professional.
Learn more about our review process on the EveryCalc methodology page.
How this calculator works
What this page estimates
This Cost Seg Benefit Calculator is built to give a quick, browser-based estimate for cost seg benefit. Cost segregation studies reclassify 15-30% of building basis from 27.5/39-year property into shorter 5/7/15-year recovery classes — carpet, appliances, fixtures, land improvements. Combined with bonus depreciation, this delivers significant first-year tax acceleration. This calculator computes net benefit (tax saved minus study cost) and ROI. The inputs stay on the page during normal use, and the result should be treated as an estimate for planning, comparison, or education rather than professional advice.
Calculation approach
The calculator applies the standard relationship implied by the inputs, then formats the answer so it can be checked and reused. For finance tools, the most important step is using consistent units, rates, time periods, and assumptions before comparing the result with another calculator or outside quote.
Example workflow
For example, start with a realistic value you already know, change one input at a time, and watch how the answer moves. That makes it easier to tell whether the result is being driven by the main amount, the rate, the time period, or a unit conversion.
Practical checks
- Use current, real-world numbers when the result affects money, health, tax, or legal decisions.
- Run a low, base, and high case when the inputs are estimates.
- Check the related calculators below when the next decision depends on a different assumption.
How to interpret the cost seg benefit result
Best use
Use the result as a planning number for comparing payments, rates, returns, tax reserves, or cash-flow choices before you request a quote or make a commitment.
Cross-check
Compare the answer with the contract, lender estimate, tax form, brokerage statement, payroll record, or invoice that will control the real-world outcome.
Watch for
Do not rely on a single optimistic rate, return, or fee assumption. Money pages work best when you run low, base, and high cases and keep professional advice separate from the estimate.
This page belongs to the Finance calculator library, so the answer should be read in the context of the decision you are modeling rather than as a universal rule.
Before relying on this cost seg benefit estimate
Most calculator mistakes come from the inputs, not the arithmetic. Use this short audit before you reuse the answer in a spreadsheet, quote, application, or important conversation.
Confirm source numbers
Match balances, rates, fees, taxes, income, and payment dates against the lender quote, payroll record, tax form, statement, invoice, or contract.
Separate cash flow from total cost
A lower monthly payment can still cost more over time if fees, interest, taxes, or a longer term are hidden in the structure.
Run conservative cases
Test at least one higher-cost or lower-return case before using the output for a purchase, refinance, investment, loan, or tax decision.
Rerun this page when the rate, price, term, fee, tax rule, income, expense, or expected holding period changes.
How to Use
- Enter building cost basis and projected reclassification %.
- Enter cost segregation study cost.
- Enter marginal tax rate and current-year bonus depreciation %.
- Read first-year tax savings, net benefit, and study ROI.
Frequently Asked Questions
When does cost seg make sense?
Properties over $500K-1M typically. Studies cost $4-25K. Net benefit usually 5-15x cost in first year. Even better with full bonus depreciation (pre-2024).
Look-back studies?
Yes — for properties owned several years, you can do a cost seg study and catch up missed depreciation via §481 adjustment in current year. Significant catch-up benefit.
Recapture risk?
Accelerated depreciation increases recapture at sale (taxed at 25%). Net benefit usually still strong because of time value, but factor recapture into multi-year planning.
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