In Bay St. Louis, How You Use a Condo Sets Its Tax Bill More Than the Millage Does

A buyer who closes on an Old Town condo on December 30, 2026 and moves in that week can be in a different tax class for 2027 than a buyer who closes on the same unit on January 2. Mississippi decides homestead eligibility on a single date. To qualify, the owner must own and occupy the home as a primary residence on January 1, and the deed must be filed with the Chancery Clerk before January 7 of the year the exemption is claimed.

That date matters because a homestead claim does more than trigger the familiar $300 credit. It decides which assessment ratio applies to the property, and on a condo in Bay St. Louis the ratio is the biggest single variable in the property tax bill.

The ratio does most of the work

Mississippi divides real property into two classes. Class I covers single-family, owner-occupied residential property and is assessed at 10% of true value. Class II covers all other real property and is assessed at 15%. According to Mississippi State University Extension, a property has to meet each part of the Class I definition exactly. Rental property falls into Class II, and a single property can be part Class I and part Class II.

The tax formula is simple. True value times the ratio gives assessed value, and assessed value times the millage gives the tax. One mill is $1 for every $1,000 of assessed value. True value is the assessor's appraisal under state guidelines, and Extension points out that it is not the same thing as market value.

For the millage, the most recent full levy posted by Hancock County is its 2025/2026 tax levy table. For the Bay St. Louis district, code 1050, it lists 46.46 county mills, 46.49 school mills, and 26.75 city mills, for a total of 119.70.

Here is that rate applied to one hypothetical condo with a $400,000 true value, owned three different ways. The true value is an illustration, not an appraisal of any real unit.

The regular homestead tier gives owners under 65 a credit of up to $300, scaled to the property's value. Owners who are 65 or older, or totally disabled, by January 1 are exempt from taxes on the first $7,500 of their homestead's assessed value. After the first year, that exemption can grow to cover most future increases in value.

In the table, the gap between the second-home row and the under-65 primary-home row is about $2,694 a year. The $300 credit accounts for only $300 of it. The other $2,394 comes from the difference between 15% and 10%. For a downsizer who qualifies for the age tier, the gap from the Class II bill grows to roughly $3,292 on the same unit.

Why a millage vote barely shows up next to that

Millage changes make the local news, so it helps to measure them against the class gap. The City of Bay St. Louis's September 1, 2026 council packet includes a resolution fixing levies for the fiscal year that runs from October 1, 2026 through September 30, 2027. It lists 26.75 municipal mills, the same as the prior year, and 45.92 mills for the Bay St. Louis-Waveland School District. The combined city and school total is 72.67 mills. Two caveats apply. The copy in the packet is unsigned, and our research did not find a record confirming final adoption. Hancock County's own levy for the same year had not turned up either, so a confirmed full FY2027 rate for Bay St. Louis is not yet available.

If the proposed school rate holds, it is 0.57 mills below the 46.49 on the 2025/2026 table. On the hypothetical condo, that comes to about $23 a year for a Class I owner and about $34 for a Class II owner. The class difference on the same unit is roughly 100 times larger. Millage is set each September for the fiscal year starting October 1, so it changes a little every year. The ratio applied to a unit depends on how its owner uses it and changes only when that use changes.

The calendar a fall closing runs on

Mississippi assesses property to the owner of record on January 1 and issues bills later in the year. Taxes are due by February 1 for property assessed the year before. For someone buying a condo as a primary home this fall, the dates fall in this order:

1. December 31, 2026. The last day to own the unit and be living in it as a primary residence for a 2027 claim.
2. January 1, 2027. The eligibility snapshot. The applicant has to own and occupy the home on this date.
3. Before January 7, 2027. The deed has to be on file with the Chancery Clerk.
4. January 1 through April 1, 2027. The window to apply in person at the Hancock County Tax Assessor's office during business hours.
5. By February 1, 2028. The due date for 2027 taxes.

A buyer who closes on January 2, 2027 misses item 2. Under the Department of Revenue's homestead rules, that buyer cannot claim a homestead for 2027, and the first claim would be for 2028. Our research did not find an authoritative answer on how a parcel is classified for the rest of the year after it changes hands, so that question belongs with the Tax Assessor's office.

The application itself asks for Social Security numbers, the total purchase price, the down payment, the closing statement or other transaction documents, and the tag numbers of every vehicle the applicant owns or uses. Once approved, the exemption carries forward each year. A new application is needed after a change in ownership, use, or occupancy, or when the owner moves into a different tier, such as turning 65.

Who ends up in Class II without choosing it

Second-home owners usually expect the higher rate. The bigger surprise is how firmly the eligibility rules shut the door. DOR requires applicants and their spouses to comply with Mississippi income tax law, and it states that no one is eligible if they or their spouse claim residency in another jurisdiction when assessed for Mississippi income tax. A household that files income taxes as residents of Louisiana and spends weekends on Court Street is in Class II for that unit, whatever time of year it closed.

Short-term rental owners land in the same place for a different reason. Extension classifies rental property as Class II and notes that one property can be part Class I and part Class II. The homestead application asks whether any part of the dwelling or land is rented or leased. Our research found no Mississippi guidance that sets a rental-frequency threshold or explains how a unit's Class I and Class II portions are divided. An owner who plans to live in a unit and rent it occasionally should ask the assessor how that use would be classified before relying on the lower ratio.

DOR also warns that failing to meet every eligibility requirement can cost an owner the exemption retroactively.

For an investor comparing net yields on Old Town condos, the 15% ratio is a fixed cost of owning the unit as a rental. For a downsizer who is selling a house elsewhere in Mississippi and moving in full time, the closing date on the condo has a tax value that is easy to miss when scheduling the move.

FAQ

How often does the assessor revalue a condo? State guidance requires real property to be revalued at least once every four years. The true value in the formula can move on that cycle even when millage stays the same.

Did the Legislature change the 10% and 15% ratios or the standard exemption amounts recently? Our research found no enacted change to either in 2025 or 2026. DOR describes the ratios as set by the state constitution. Bills filed in 2025 to raise the age-65 exemption were only introduced versions, and we did not confirm what happened to them.

Is anything changing for veterans? The version of 2026 House Bill 420 sent to the Governor lowers the age at which an honorably discharged veteran qualifies for a full homestead exemption from 90 to 85, starting January 1, 2027, and extends it to qualifying unremarried surviving spouses. The Hancock County Tax Assessor can confirm whether it applies to a particular household.

Can I get an exact bill for a specific unit before I buy? Not from these figures alone. An exact bill needs the assessor's true value for that unit and the final adopted millage for the tax year.

This post is general information about how Mississippi property tax works. It is not legal, tax, or financial advice, so please confirm your own situation with the Hancock County Tax Assessor and a qualified tax professional.

124 Court Development can walk you through closing timing at 124 Court Street with the January 1 date in mind. Schedule a Consultation.