# Michigan Property Tax Uncapping: A Guide for Homeowners

By Mark Davis (@markdavis) · Published 2026-07-29

Canonical: https://voce.com/@markdavis/michigan-property-tax-uncapping-guide-homeowners-wmglwu

---

Michigan homebuyers often face a **payment shock** in their second year of ownership when property taxes "uncap" and reset to market rates. This "pop-up tax" occurs because Michigan’s Proposal A caps annual tax increases while a home is owned, but removes that protection the moment it sells ([The Perna Team](https://www.thepernateam.com/blog/idden-costs-of-buying-a-home-in-michigan)). Without accurate pre-closing calculations, your monthly mortgage payment could jump by hundreds of dollars overnight ([GOP House](https://gophouse.org/posts/column-ending-michigans-pop-up-tax-will-make-homeownership-more-affordable)).

![residential home with sold sign Michigan real estate](https://www.mlive.com/resizer/v2/UGNIUA7C25A4HMSYLICNBEF2EE.jpg?auth=a2f82349e03899fd7663aae197a267931da6089aeb01713716a68d52bea56ab4&width=500&smart=true&quality=90)

#### Key Takeaways

-   The 'pop-up tax' occurs when a home sale triggers a reset of Taxable Value (TV).
-   Most out-of-state lenders use the seller's old tax rate, leading to escrow shortages.
-   Year-two tax increases commonly range from $1,500 to over $10,000 in hot markets.
-   A professional tax projection before closing is essential to avoid budget fatigue.

## What is Property Tax Uncapping?

Property tax uncapping is the statutory reset of a home’s **Taxable Value (TV)** to its **State Equalized Value (SEV)** following a transfer of ownership. TV is currently capped at 5% or inflation annually, but the SEV tracks roughly 50% of the true market value ([Rocket Mortgage](https://www.rocketmortgage.com/learn/property-tax-in-michigan)). When you buy a home that hasn't sold in decades, the gap between the seller's capped rate and your new market rate can be massive ([The Perna Team](https://www.thepernateam.com/blog/idden-costs-of-buying-a-home-in-michigan)).

## Why Does Proposal A Trigger This Reset?

Established in 1994, **Proposal A** provides housing stability by preventing taxes from skyrocketing alongside home values—but only for the current owner. For **new homebuyers**, this creates a "hidden cost" where the first year's tax bill looks manageable before resetting the following year ([GOP House](https://gophouse.org/posts/column-ending-michigans-pop-up-tax-will-make-homeownership-more-affordable)). This primarily penalizes those who buy homes from long-term owners in appreciating neighborhoods ([The Perna Team](https://www.thepernateam.com/blog/idden-costs-of-buying-a-home-in-michigan)).

## How to Avoid "Payment Shock"

You can protect your budget by calculating your future property taxes based on the home's **purchase price**, not the seller's history. Instead of relying on the MLS listing or a generic mortgage calculator, use the [Michigan Treasury Property Tax Estimator](https://www.kalcounty.gov/1366/Estimate-My-Current-Years-Property-Taxes) to run a projection using your target millage rate. Working with a local mortgage professional ensures these numbers are baked into your **debt-to-income (DTI)** ratio from day one, preventing an escrow shortage letter in year two ([The Perna Team](https://www.thepernateam.com/blog/idden-costs-of-buying-a-home-in-michigan)).

#### Ready to Plan Your Next Move?

Whether you are buying a home or planning a property transfer, accurate tax projections are essential. Contact our Trenton office today to discuss your options.

[Contact Mark Davis](https://www.themortgagelink.com/loan-officer/mark-davis)

?Frequently Asked Questions3 questions

1Can I use the seller's last tax bill for my mortgage math?

No. The seller's bill likely benefits from years of Proposal A caps. Your base value will 'uncap' to roughly 50% of the purchase price or SEV in the year following the sale, often resulting in a significantly higher payment.

2What is an escrow shortage letter?

If your lender uses the seller's old taxes to set up your escrow, they will eventually realize the taxes have increased. They will then send a letter requiring you to pay the difference in a lump sum or significantly increase your monthly payment to catch up.

3Does my Principal Residence Exemption (PRE) help?

Yes. Filing Form 2368 (PRE) by June 1 can exempt you from approximately 18 mills of school operating tax. However, even with a PRE, your taxable value will still 'uncap' to market rates after the transfer.