"Why Is the First Property Tax Bill on My New Construction Home So Low, and What Will the Full Bill Be?"

The sod went down last week, the final walkthrough with your builder is on Thursday, and the county's parcel record for your new home still shows a building value of zero. The only thing the assessor has on file is the lot. As far as the county's tax roll is concerned, which is its list of every property and what each one is assessed at, you are about to buy a piece of land with a very nice driveway.

The first property tax bill on a newly built home is usually figured on the land alone, or on only part of a year. The county values property on a fixed date each year and adds a home once it is finished. If you budget and set your escrow from the projected full bill, the change in year two is one you already planned for.

I'm Jeff Moran, a mortgage broker in Bluffton, South Carolina, originating since 1996, licensed in fifteen states, NMLS #483943, through C2 Financial Corporation. On a new build, the tax bill is the one line of your payment nobody at the closing table can show you yet, because the county has not mailed it. You can still get a good estimate before you close.

Why is the first property tax bill on new construction so low?

Every county that taxes real estate picks a date and values each parcel as it stands on that day. Some counties use January 1. Others use December 31 of the year before. The condition of the property on that date sets the bill for the year that follows.

A home that was a slab or a frame on the county's date gets taxed as exactly that. In some states a building is not added at all until it is finished. In others, a partly built home is valued for the share that is done. Either way, the bill that exists on your closing day was usually set before your home was a home.

A home finished in the spring may not carry its full value until the next tax roll, so the low bill can last a year or more. Sometimes the increase comes in two steps, a partial value first and then the full one. The county values property on its own calendar, and your builder finished on a different one.

The article on how property taxes change after you buy a home covers the other reasons a bill moves after a sale, like a reassessment at transfer or a seller's exemption ending.

Property tax timing in South Carolina, Georgia and California

Property tax timing is set state by state, and counties often add their own rules. These are examples, and your county's assessor can give you the dates for your home.

If you are buying in South Carolina, the state's tax code, at § 12-37-670, says a new structure is not listed or assessed until it is completed and fit for the use it was built for. The same section lets a county choose, by ordinance, to add a finished home on a quarterly schedule after the certificate of occupancy is issued. Chesterfield County's assessor puts the calendar plainly: the status of the property on December 31 is the basis for the next year's tax. So if your home is finished in March, in a county without the quarterly option, your bill for that year generally still carries the lot's value.

In Georgia, the county values your property as of January 1. A Georgia Department of Revenue training document quotes the state rule for construction in progress: a partly built home is appraised the same way as similar property, and its value can be reduced because it is unfinished. The same document says that when a lender funds the build through draws, the share of money spent by January 1 can show how complete the home was. If yours was half built on January 1, your bill can carry a partial value that year and the full value the next.

California handles it with a separate bill. Sonoma County's tax collector explains that state law reassesses property as of the first day of the month after an ownership change or the completion of new construction, and the difference gets billed as a supplemental tax. Those bills go to you as the owner, and the California supplemental property tax bill walks through why the escrow account usually does not pay them. The calendars differ, and in each of them your first bill and your full bill are different numbers.

The lot's tax bill and your closing numbers

Three numbers get set around your closing, and on a new build they do not always start from the same tax figure. I'll take them in the order you meet them.

The first is the payment you qualify on. Fannie Mae's Selling Guide covers this in B3-6-03, Monthly Housing Expense for the Subject Property. For purchase and construction-related loans, the lender "must use a reasonable estimate of the real estate taxes based on the value of the land and the total of all new and existing improvements."

FHA's Single Family Housing Policy Handbook, section II.A.5.d, says the same for its loans: in new construction cases, "property tax estimates must be based on the land and improvements." So the payment you were approved on should already carry a tax figure for the finished home.

The second is the proration on your settlement statement. The tax split between you and the builder is usually figured from the most recent bill, and on a new build that is often the lot's bill. A small credit for a small bill is correct math. The guide to how a prorated property tax credit works at closing covers where that credit goes on the settlement statement.

The third is your escrow deposit and your monthly escrow amount, which is the part of the payment you send every month. Depending on who sets it up, that estimate may be the projected full bill or the lot's current bill. The two can be far apart, so it is worth asking which one was used before you sign. How escrow accounts hold your taxes and insurance explains the account itself.

Your escrow analysis when the full bill arrives

Your escrow account follows a federal rule, Regulation X, at 12 CFR 1024.17. On a new build, this is how it plays out for you.

At closing, you make an initial deposit sized from the tax figure in your file, plus a cushion the rule caps at one-sixth of the year's estimated payments. During the lot-only months, you send a monthly amount sized to the smaller bill. Your servicer, the company you send your payment to, pays the full bill when it arrives. If the account comes up short at that point, a balance below zero is called a deficiency.

Your servicer also runs an escrow analysis at least once a year. It compares what your account collected with what it paid out, then projects the next twelve months from the bills it now has. On a new build, that is the letter where your monthly escrow amount goes up to match the full bill.

The same letter tells you what to do about any gap, and the rule protects you here. A shortage means the projected balance falls below the balance your servicer aims to hold. If the shortage is one month's escrow payment or more, the servicer can leave it alone or spread it over at least twelve equal payments, and it cannot demand a lump sum. A deficiency is repaid on its own schedule, which can be as short as two equal monthly payments.

Two changes usually arrive in that one letter. The monthly escrow amount rises to fund the full bill going forward, and any shortage gets added on top for the year you are repaying it. The shortage part ends when it is repaid, and the higher base amount stays.

Steps to plan for the full tax bill before you close

1. You can call the county assessor's office with three questions. You'll want to know the date the county values property each year, when a finished home gets added to the tax roll, and whether the first year carries a partial value or a supplemental bill.
2. You can ask your lender for the tax figure you were qualified on. That number is the closest thing to the full bill anyone has run so far.
3. You can compare it with the escrow section of your Closing Disclosure. If the escrow was built from the lot's bill, the difference between the two figures is what your payment is going to grow by.
4. You can decide where that difference lives for the first year. Some lenders will set the escrow from the projected bill if you ask. If yours does not, you can move the monthly difference into savings yourself, so the money is waiting when the analysis letter comes.
5. You can file for any owner-occupied exemption in your own name. In many states that filing lowers the full bill, and the builder does not file it for you.
6. You can read the first analysis letter line by line. It shows the bill the servicer paid, your new monthly escrow amount and how any shortage is being repaid.

Common mistakes with a new home's first tax bill

• Your first bill covers the lot, or part of a year, and the figure that lasts is the one on the finished home.
• A low escrow amount in year one can feel like room in the budget, but you will need that money once the full bill arrives.
• If you compare two builders by their tax lines, a community where homes were finished a year earlier shows fuller bills, which can make a newer community look cheaper than it is.
• The qualifying figure and the escrow figure can differ on a new build, so it helps to check that they match.

If you are still choosing who will finance the home, buying new construction with the builder's lender or your own covers the loan side. If you are building on a lot you own, how a construction-to-permanent mortgage works covers the loan that carries you from the first draw to the finished home.

An illustration with made-up numbers

These numbers are made up to show the mechanism, and they are not a quote or an estimate for any address. The cushion is left out to keep the arithmetic simple.

You close on a new home in a county where the bill on file covers the lot only, at $1,200 a year. The county's own estimate for the finished home is $5,400 a year. The escrow was set from the lot's bill.

Year one, escrow set from the lot's bill	Monthly
Tax escrow collected	$100
Total tax escrow	$100

The full bill arrives, and the analysis finds the account $3,800 behind where it needs to be.

Year two, after the analysis	Monthly
Tax escrow for the full bill ($5,400 ÷ 12)	$450
Shortage spread over 12 months ($3,800 ÷ 12)	$317
Total tax escrow	$767

That is $667 a month more than year one for twelve months, then $450 a month once the shortage is repaid.

Now the same home, planned from the county's estimate. You set aside the $350 monthly difference in savings during year one, or the escrow was set at $450 from the start. In year two the tax escrow is $450, the savings cover the catch-up, and the payment change is one you already lived with.

Seeing your payment with the full tax figure

Once you are ready to see the whole payment, you can see rate options priced for your own scenario with no credit pull and no account. You choose a rate option, and the selection can change. If you enter the county's estimate for the finished home instead of the lot's bill, the payment you see is the one you will be making in year two. How much home you can comfortably afford walks through the rest of that payment. If you would rather talk it through, you are welcome to call me, and I am happy to look at the builder's numbers with you.

Nothing here is a loan approval, a denial, a commitment to lend, or tax advice. Assessment dates and the value placed on a specific parcel are set by that county's assessor, and they are worth confirming with that office.

Common questions

Why is my property tax bill so low on my new construction home?

The county values property as it stands on a fixed date each year, such as January 1 or December 31. If your home was not finished on that date, the bill was figured on the land alone or on a partial value. The full value appears on a later bill, once the county adds the finished home to its tax roll.

When will my new home be fully assessed?

It depends on the state and the county. South Carolina does not assess a new structure until it is completed and fit for its use. Georgia values property as of January 1, and California bills new construction through a supplemental assessment. The county assessor can give you the date for your parcel.

Will my mortgage payment go up after the first year on a new build?

Often, yes, if your escrow was set from the lot's tax bill. Once the full bill arrives, the servicer's escrow analysis raises the monthly escrow amount to match it and may add a shortage repayment for a year. The principal and interest on a fixed-rate loan stay the same.

Can I set my escrow based on the full tax bill instead of the land-only bill?

Some lenders will set the escrow from a projected bill when you ask, and Fannie Mae and FHA both require the qualifying tax estimate on new construction to include the finished home. If your lender sets the escrow from the current bill anyway, you can save the monthly difference yourself so the money is ready when the analysis comes.

Do I have to pay an escrow shortage all at once?

Usually not. Under Regulation X, 12 CFR 1024.17, a shortage of one month's escrow payment or more can be left in place or spread over at least twelve equal monthly payments, and the servicer cannot require a lump sum. A smaller shortage can be collected within 30 days. A deficiency, which is a negative balance, follows a separate schedule that can be as short as two monthly payments.