Sign settlement papers on a Newark-area home this October or early November, and the tax proration will rest on a firm number for the city portion only. The county and school portion, the larger share for most homeowners, has no 2026–27 bill behind it yet. Under Delaware law, New Castle County real estate taxes become due July 1 each year, and the county's annual bill covers a July-to-June year. New Castle County now expects to mail county and school bills in mid-November 2026, with payment due December 31, 2026. The school boards that set the biggest piece of that bill are voting on their rates this month. Anyone closing before those bills are mailed is splitting the cost of a bill that hasn't been calculated.
Three bills on three different clocks
A Newark homeowner doesn't get one property tax bill. Depending on where the parcel sits, there can be three separate charges, and in 2026 they're running on very different schedules.
| Piece of the bill | Who sets it | 2026 status as of October 12 |
|---|---|---|
| City of Newark tax | City of Newark, only for parcels inside city limits | Mailed by August 24, due September 30 |
| County tax | New Castle County Council | FY2027 rate adopted in May; bill expected mid-November |
| School tax | Christina, Red Clay or another district board | Rates up for vote at October board meetings |
The city side is settled. Newark posted its 2026 tax notice on August 19 and said bills would go out by Monday, August 24, with payment due September 30 to avoid a penalty. The county's 2025–26 rate schedule lists incorporated Newark as its own tax district, at 4.32 cents per $100 of assessed residential value, separate from the unincorporated areas around it. The city's FY2027 budget overview assumes no property tax rate increase, though the document is labeled as a proposed budget. A Newark mailing address and a Newark city tax bill aren't the same thing. The parcel's tax district decides whether the city line shows up at all.
The other two rows are where a fall closing gets complicated.
Why the county and school bill is four months late
In a normal year, New Castle County mails bills in mid-July and they're due September 30. This year Senate Bill 228 changed that. The law authorized the county to run a quality control review of non-residential property assessments, after complaints that the reassessment had undervalued several prominent business properties. The county hired Cushman & Wakefield to review a random sample of 50 non-residential properties. In its July 9 reassessment update, it said the assessment roll couldn't be finalized until that review was done, and moved billing to mid-November.
That pushes the problem down to the school districts. Spotlight Delaware, in a July report carried by the Newark Post, said Christina, Appoquinimink and Colonial couldn't vote on new rates in July as they normally would, because they first needed the county's updated tax base. Their boards would vote at October meetings instead, and bills would follow in November.
The News Journal reported on September 30 that the county's spokesperson said Cushman & Wakefield had finished reviewing roughly 50 properties. According to that report, the county was still assessing the findings and hadn't said whether more steps were needed. The same story said bills were still expected in November. It also said Rep. Cyndie Romer, who chairs the working group, estimated that roughly 1,000 properties might need separate quality control reviews. The county didn't confirm that figure. So the timeline is still expected to hold, but nobody has confirmed it since the review ended.
What's being decided while your closing date approaches
The county's share is known. New Castle County Council adopted a 17.2% property tax increase for FY2027, Spotlight Delaware reported, which puts the residential rate at 18.46 cents per $100 of assessed value. Delaware Public Media put the increase at about $102 a year, or $8.50 a month, on the county portion for a home at the median assessed value of $378,000. That figure covers only the county portion, not the full bill.
The school portion is still open. Christina's board calendar shows public meetings on October 13 and October 20. Red Clay's regular October meeting is listed for October 21. Neither calendar names a tax vote in the listing. In July, Christina officials signaled that a tuition tax increase, the part of the school levy that funds special education, was likely. Red Clay officials floated a possible 1.9% school tax increase.
The boards are working under two laws passed this summer. House Bill 461, sponsored by Rep. Cyndie Romer and signed July 23, lets New Castle County districts reset 2026–27 rates so operating revenue doesn't exceed the prior year's. The exceptions are referendum revenue and each district's average growth in taxable property. House Bill 462, sponsored by Rep. Kim Williams, became law without the governor's signature on August 5. It lets districts keep separate residential and non-residential rates, with the non-residential rate capped at 1.85 times the residential rate. That split matters to a homeowner. The residential rate depends partly on how much of the district's revenue the commercial side can carry.
How far a school bill can move after the fact
Last year showed how much a Newark-area school bill can change after the first number appears. In its coverage of Christina's 2025 rate reset, the Newark Post used an example home in Fairfield. Its Christina school tax was $2,530 before reassessment, jumped to $3,556 on the first 2025 bill, then fell to $2,734 after Christina reset its rates. That reset set Christina's residential rate at about 61.5 cents per $100 and the non-residential rate at $1.21. The difference between the first bill and the final bill on that one house was $822.
The assessments underneath those rates are still changing too. In its July update, the county reported more than 5,300 appeals from the 2025 reassessment and more than 1,500 new appeals for 2026. Before reassessment, the average was 64 a year. As of June 30, 2026, its tracker showed 9,969 processed 2025 refunds totaling $3,872,055, with 2,777 still remaining. A house under contract this fall could have an appeal pending, a correction on file, or a refund still owed for last year.
What the contract says, and the part it leaves open
The Delaware Association of REALTORS residential Agreement of Sale says taxes are apportioned pro rata at final settlement. That covers the split. It doesn't say how to do the math when the current year's bill hasn't been issued. I couldn't find a published Delaware standard that settles whether the proration should use last year's bill, an estimate, a holdback, or a later re-proration agreement. In practice, that choice is made in the settlement documents.
The person making it is an attorney. Delaware requires real property settlements, including residential sales, to be conducted by a Delaware-licensed attorney, as the law firm Offit Kurman explains. Here are the questions to ask that attorney before settlement day:
- Which figure is the county and school proration based on, and is it last year's final bill or the initial July 2025 bill?
- Does the settlement include any agreement to re-prorate once the November bill arrives?
- If the seller's lender pays taxes from escrow, how does the payoff handle a bill that hasn't been issued?
- Is there an open assessment appeal or correction on the parcel?
- For homes inside city limits, was the September 30 city bill paid, and how is it split?
Mortgage escrow adds its own timing. During the 2025 delay, the county said mortgage companies knew about the revised bills and due date, and that they typically take about three weeks after receiving a bill to pay it. Last year, revised bills went out November 24 to 28, 2025, and were due December 31. If this year runs on a similar schedule, a buyer closing in late October could own the house for weeks before anyone sees the bill.
Quick answers
If the bill changes after the sale, who gets the refund? The county's November 2025 FAQ says overpayment refunds go to the original payee. When a mortgage company paid the taxes, the county refunds that company directly. The county pays whoever paid. Sorting out what the buyer and seller owe each other after that comes down to the settlement terms.
Does every home with a Newark address pay city tax? No. The county's rate schedule lists incorporated Newark as a separate tax district from unincorporated areas, so the parcel's district decides it.
Is another reassessment coming? The county says it's building systems to support reassessments every five years going forward. It hasn't announced a date for the next one.
I've worked through plenty of settlements where taxes were the easiest line on the sheet. This fall in Newark, they're one of the hardest. If you're buying or selling before the November bills arrive and want help pinning down what your proration is based on before you sign, Will Webber is glad to go through it with you. Let's Connect.
This article is general information, not legal, tax or financial advice. Consult a qualified professional about your situation.
