Calculate Cost Segregation tax savings and bonus depreciation on Zillow, Redfin, and Realtor.com listings instantly.
Users
25
−3 in 30 days
Rating
5.0 / 5
unchanged in 30 days
Ratings
16
0 in 30 days
Store rank
#141K
#118K among extensions
Version
1.2.1
updated 16 Mar 2026
Users
monthly, 8 months
Latest, 21 Oct 2026:25 usersMove the mouse over the chart for any month
Ratings count
monthly, 8 months
Latest, 21 Oct 2026:16 ratingsMove the mouse over the chart for any month
The Chrome Web Store rounds user counts down to the leading digit, so the user line moves in steps. The ratings count is exact and is the better signal of real adoption.
About Maven Cost Seg: Tax Savings & Cash Flow Analyzer
Maven Cost Segregation: Tax Savings & Cash Flow Analyzer
Instantly analyze property tax savings and rental cash flow on Zillow, Redfin, and Realtor.com.
The Maven Cost Segregation extension is a professional-grade financial tool designed for real estate investors, CPAs, and tax strategists. It bridges the gap between a standard listing page and a deep-dive tax analysis, allowing you to instantly estimate the impact of Cost Segregation, Bonus Depreciation, and REPS (Real Estate Professional Status) on your next acquisition.
KEY FEATURES
Automatic Data Extraction:
Seamlessly scrapes purchase price, monthly rent estimates, property taxes, and square footage from Zillow, Redfin, and Realtor.com.
Advanced Cost Segregation Engine:
Dynamically reallocates building basis into 5, 7, and 15-year MACRS asset classes based on specific property types (Single Family, Multi-Family, Short-Term Rental, etc.).
Total Year 1 Deduction:
Leads with the "Big Number"—the total accelerated depreciation deduction unlocked by your study.True Cash Flow Analysis: Calculates actual Net Operating Income (NOI) and True Annual Cash Flow by including 30-year fixed mortgage amortization (P&I) and Operating Expenses.
Interactive Assumptions Sandbox:
A red-alert "Verify Assumptions" drawer lets you overwrite any scraped data, adjust down payment, interest rates, and land value percentages in real-time.
THE MATH BEHIND THE MAVEN STRATEGY
This tool utilizes standard accounting formulas to provide institutional-grade estimates:
Mortgage Amortization:
$M = P \frac{r(1+r)^n}{(1+r)^n - 1}$ (Principal & Interest calculation).
MACRS Reallocation:
Hardcoded asset class matrices derived from professional cost segregation case studies (e.g., allocating ~35% of basis to short-life assets for Short-Term Rentals).
Tax Savings Calculation: Projects net tax savings based on your marginal tax bracket and current Bonus Depreciation rules (100%, 80%, or 60% elective).
🏡 SUPPORTED PLATFORMS
Zillow (Auto-extract)
Redfin (Auto-extract)
Realtor.com (Auto-extract)
Manual Entry Mode:
Use the extension as a universal real estate calculator on any website by manually entering values into the top-level drawer.
PRO-TIP: DATA LOADING
If you receive an error stating a site cannot be scraped, it may be due to the platform's "lazy-loading". Simply SCROLL down the property listing page OR REFRESH the page to ensure all data is loaded and try analyzing again.
ABOUT MAVEN COST SEGREGATION
Maven Cost Segregation is a boutique tax advisory firm specializing in engineering-based cost segregation studies. Our mission is to help investors front-load years of depreciation into Year 1, creating massive tax-free cash flow to reinvest into future deals.Learn more or get a certified engineering estimate: https://mavencostseg.com