Maryland property taxes are paid in advance. The bill covers a taxable year that starts July 1 and runs through June 30 of the following year, and it becomes due on July 1 at the start of that year.1New York Codes, Rules and Regulations. Maryland Code Tax-Property 10-102 – Due Dates The word “arrears” comes up a lot in this context, but in Maryland it describes what happens when a bill goes unpaid past its deadline, not the billing method itself. Whether you owe interest, and how much, depends on which date on the calendar you miss.
The July 1 Tax Year and the September 30 Line
Every property tax bill in Maryland attaches to a taxable year that begins July 1. That is the date the tax becomes due. For properties billed annually, you have until September 30 to pay the full amount without any interest charge. Anything still owed on October 1 is considered in arrears, and interest starts running from that day.1New York Codes, Rules and Regulations. Maryland Code Tax-Property 10-102 – Due Dates
So the answer to the advance-or-arrears question has two parts. The tax is billed in advance of the year it covers. The tax is only in arrears if you miss the payment deadline for that same year.
How Semiannual Billing Splits the Calendar
Most Maryland homeowners don’t pay the full year in one lump. They’re on a semiannual schedule that divides the bill into two installments. The first half is due July 1 and can be paid through September 30 without penalty. The second half is due December 1 and must be paid by December 31 to stay penalty-free.2Baltimore County Government. Payment Schedules
Both installments still cover the same July-through-June tax year, so the timing is still advance billing. The December installment isn’t payment for a past period. It’s the second half of the tax for the year currently underway. If either installment slips past its deadline, that piece flips into arrears and starts collecting interest.
Who Actually Gets Semiannual Billing
Maryland law requires every county and municipality to offer a semiannual payment option for two types of property. The first is owner-occupied homes used as the owner’s principal residence. The second is business property where the combined annual state, county, municipal, and special-district taxes come to $100,000 or less.3New York Codes, Rules and Regulations. Maryland Code Tax-Property 10-204.3 – Semiannual Payment Schedules Rental properties, second homes, and larger commercial parcels above that threshold get annual bills with a single September 30 deadline.
You do not need to apply for the semiannual schedule. Eligible properties are enrolled automatically once the State Department of Assessments and Taxation (SDAT) has the property coded as owner-occupied. If you’re getting an annual bill and think you should be on the semiannual schedule, the fix is usually an occupancy code correction with SDAT rather than a payment application.2Baltimore County Government. Payment Schedules You can also opt out of the split and pay the whole year by September 30 if you’d rather be done with it.
What “In Arrears” Actually Costs
Once a payment is late, interest starts running. The default rate across Maryland is two-thirds of 1% per month, or partial month, that the tax stays unpaid. A few jurisdictions charge more: Washington County, Somerset County, and the City of Salisbury each impose 1% per month.4Maryland General Assembly. Maryland Code Tax-Property 14-603 – County, Municipal Corporation, and Taxing District Interest Rates for Full Year Property Tax
The interest clock starts on October 1 for the annual bill or the first semiannual installment, and on January 1 for the second semiannual installment. It compounds monthly, so a bill you meant to pay in October can grow noticeably by the following spring even if the underlying amount was small. The month counts by any partial month, meaning a payment made on October 2 draws the same first month of interest as one made on October 31.
A late payment doesn’t just cost interest either. Prolonged delinquency lets the county proceed to a tax lien sale on your property, and the costs at that stage go well beyond the monthly interest rate. Redeeming your property once a lien has been sold means paying the taxes, the interest, the certificate holder’s expenses, and any legal fees the holder has incurred pursuing foreclosure. The cheaper move is always paying before the arrears window opens.
Paying Through a Mortgage Escrow Account
Most Maryland homeowners with a mortgage never write a check to the county themselves. The lender collects a portion of the tax with each monthly mortgage payment, holds it in an escrow account, and pays the county when the installment comes due. That mechanic doesn’t change the advance-billing structure. Your servicer is still meeting a July 1 due date and a December 1 due date for the current tax year.
Federal rules require your servicer to send you an annual escrow statement showing what came in, what was paid out, and whether the account has a surplus or shortage.5Consumer Financial Protection Bureau. Regulation 1024.17 – Escrow Accounts Read it. Escrow miscalculations happen more often than homeowners assume, and an underfunded account can produce a shortage bill or, in the worst case, a missed tax payment that puts your property into arrears without you knowing.
If your servicer misses a payment from your escrow account and the county assesses interest as a result, you can submit a written notice of error to the servicer. The servicer must investigate and respond, cannot charge you for the review, and is barred from reporting related negative information to credit bureaus for 60 days while the matter is being resolved.6eCFR. 12 CFR 1024.35 – Error Resolution Procedures
The Short Version
Maryland bills property taxes in advance for a tax year that runs July 1 to June 30. On the annual schedule, the full bill is due July 1 with a grace period through September 30. On the semiannual schedule that most homeowners fall under automatically, the year is split into a July installment and a December installment, with grace periods ending September 30 and December 31. Miss either deadline and that portion is in arrears, accruing interest at two-thirds of 1% per month in most of the state and 1% per month in Washington County, Somerset County, and Salisbury. The distinction between paid-in-advance and paid-in-arrears in Maryland isn’t about the billing calendar. It’s about whether you paid on time.