County Transfer Tax Gap Calculator

Counties sometimes reassess at higher values. This calculator sizes the gap.

Declared purchase price

County assessment value

Transfer tax rate

Additional exposure

$4,500

Valuation gap

$450,000

Declared tax

$28,000

How the math works

Gap = assessment − declared. Additional exposure = gap × rate.

Counties increasingly use data-match algorithms to flag undervalued transfers. Document the arm's-length nature of the sale in the recording packet — even a one-page narrative referring to listings, broker, and competing bids can pre-empt audit requests that otherwise land 6-18 months later.

How to Use

Enter declared purchase price.
Enter county assessment value.
Enter transfer tax rate %.
Read gap and additional tax exposure.

Frequently Asked Questions

When gap occurs?

Non-arm's-length transfers. Related-party sales. Foreclosure sales with below-market proceeds. Partial interest transfers with implied full-value. Counties can challenge declared price and reassess at market.

Documentation to support declared?

Arm's-length PSA. Third-party broker involvement. Marketing history. Competing bids. Appraisal supporting declared value. Each strengthens defense against reassessment.

Mitigation?

Include appraisal in recording packet. Reference competing offers (in non-confidential summary). Use attorney with local jurisdictional experience. Review recent transfer tax adjustments in county for patterns.

When does a lender negotiate vs foreclose?

Lenders calculate their net recovery from foreclosure (asset value minus legal, time, and sale costs) and compare to any workout proposal. If your offer nets the lender more than foreclosure, and you present it with clear sources of capital, most lenders will engage. Bring a credible sponsor, documented sources, and a timeline — vague asks get declined. Build the relationship before distress, not after.