Real Estate & Investing
Tax Deed ROI Calculator
Estimate the return on a tax deed purchase by combining the winning bid, rehab spend, carrying costs, and the resale value you expect to achieve.
Calculation inputs
Enter the bid, rehab, and carrying assumptions for the property.
Results
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Complete the fields and select Calculate to show results here.
Estimates only. Actual returns depend on local market conditions, redemption periods, and title issues.
About this calculator
This calculator projects the return on a tax deed auction purchase by weighing the winning bid, rehab spend, and holding costs against the price you expect to sell for. It is built for investors who buy properties at county tax deed sales and need a quick read on whether the numbers work before or after they bid.
How the calculation works
- Total investment = purchase price + repair costs + (monthly holding costs × holding period)
- Net profit = ARV − total investment − (ARV × selling costs %)
- ROI % = (net profit ÷ total investment) × 100
- Annualized ROI = ROI % ÷ (holding period ÷ 12)
Notes and assumptions
Tax deed purchases are bought at auction, often with limited inspection access, so the rehab figure should carry a comfortable margin.
Holding costs typically include property taxes, insurance, utilities, lawn maintenance, and any financing interest during the hold.
Annualizing the return makes short holds comparable with longer buy-and-hold projects.
How it works in plain English
The calculator adds the purchase price, the repair budget, and the total holding costs (monthly holding cost multiplied by the number of months held) to arrive at total investment. Holding costs typically cover property taxes, insurance, utilities, and any interest on financing used during the hold.
From the estimated after-repair value (ARV), it subtracts a selling cost percentage — covering agent commissions, closing costs, and similar fees — to find net sale proceeds. Net profit is the ARV minus total investment and selling costs.
ROI is net profit divided by total investment, expressed as a percentage. Because holding periods vary widely, the tool also annualizes ROI by dividing it by the holding period in years, so a six-month flip can be compared fairly against a project that takes eighteen months.
Because the model treats purchase price, rehab, and holding costs as inputs rather than fixed facts, small changes in any one of them can noticeably shift the ROI outcome. Running the numbers with a slightly higher repair estimate or a longer holding period before bidding is a useful way to see how much cushion the deal actually has.
The formula
- Total investment = purchase price + repair costs + (monthly holding costs x months)
- Net profit = ARV - total investment - (ARV x selling costs %)
- ROI % = (net profit / total investment) x 100
- Annualized ROI = ROI % / (holding period in months / 12)
Worked example
A buyer wins a tax deed at auction for $45,000. Repairs are budgeted at $25,000, and holding costs run $450 a month for an expected six-month hold, adding $2,700. Total investment is $72,700.
The estimated resale value is $120,000, and selling costs at 8% of ARV come to $9,600. Net profit is $120,000 minus $72,700 minus $9,600, which equals $37,700. ROI is $37,700 divided by $72,700, or about 51.9%. Since the hold is six months, or half a year, annualized ROI is roughly 103.8%. That annualized figure assumes the same pace could be repeated, which is a useful comparison point but not a guarantee. Profit as a share of the $120,000 ARV comes to about 31.4%, comfortably above the 15% to 20% margin many tax deed investors look for before bidding, giving this deal reasonable cushion against unexpected repair costs or a softer resale market.
Frequently asked questions
Why does the calculator exclude the mortgage payment?
Tax deed purchases are frequently made in cash, and the tool focuses on the investment's own performance rather than any financing structure layered on top. If a loan is used, its interest can be folded into the monthly holding cost figure to keep the total investment realistic.
How should I estimate ARV for a tax deed property?
Base it on recent sales of comparable, fully renovated homes nearby, not on the county's assessed value or the property's pre-repair condition. Tax deed properties are often sold with limited or no interior access, so ARV estimates carry more uncertainty than a typical resale and should be conservative.
What if the rehab costs more than expected?
Because tax deed properties are usually bought sight-unseen or with restricted access, actual repair costs can run well above initial estimates. Re-run the calculator with a higher repair figure to see how sensitive the ROI is, and consider budgeting a contingency into the rehab number from the start.
Does the calculator account for redemption periods?
No. Some states allow a former owner to redeem the property within a set window after a tax deed sale, which can delay or unwind a resale. This tool assumes a clear, sellable title and does not model redemption risk, so check local statutes before relying on the projected timeline.
Is annualized ROI the best number to compare across deals?
It is useful for comparing projects with different holding periods, but it assumes the same return rate could be repeated for a full year, which is rarely true in practice. Use it alongside the raw ROI and net profit figures rather than as the only metric for a go or no-go decision.
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