Maryland Security Deposit Interest Calculator

Determine the simple interest accrued on a residential rental deposit in Maryland.

Understanding the Maryland Security Deposit Interest Calculator

This maryland security deposit interest calculator is a specialized tool designed to help both tenants and landlords in Maryland compute the interest due on a security deposit. According to Maryland law, landlords are required to hold security deposits in an interest-bearing account and pay the accrued interest back to the tenant at the end of the tenancy. This calculator simplifies the process by applying the state-mandated interest rates and accrual rules.

Anyone involved in a residential lease in Maryland, whether a tenant wanting to verify their return or a landlord ensuring compliance, should use this tool. It removes guesswork and helps prevent disputes over the final returned amount. For more details on compliance, you might want to review Maryland Landlord-Tenant Laws.

Maryland Security Deposit Interest Formula and Explanation

Maryland law specifies how interest on security deposits must be calculated. The interest is simple interest, meaning it does not compound. It accrues in six-month intervals.

For leases starting after January 1, 2015, the annual interest rate is the greater of 1.5% per year or the daily U.S. Treasury yield curve rate for 1 year from the first business day of the year. For simplicity, this calculator uses a rate of 1.5% per six-month period (equivalent to 3% annually) as a baseline, but the actual rate can vary each year.

The basic formula is:
Total Interest = Deposit Amount × (Annual Rate ÷ 2) × Number of Full 6-Month Periods

Formula Variables

Variables used in the Maryland security deposit interest calculation.

Variable	Meaning	Unit	Typical Range
Deposit Amount	The principal amount of the security deposit.	USD ($)	$50 – $5,000+
Annual Rate	The legally mandated annual interest rate.	Percentage (%)	≥ 1.5%
6-Month Periods	The total number of full six-month intervals the deposit was held.	Count (unitless)	1, 2, 3…

Practical Examples

Example 1: Standard One-Year Lease

• Inputs:
  • Security Deposit: $1,800
  • Move-In Date: January 15, 2024
  • Move-Out Date: January 14, 2025
• Calculation: The deposit is held for 12 full months, which equals two 6-month periods. Assuming a 3% annual rate (1.5% per period): Interest = $1,800 * 0.015 * 2.
• Results:
  • Total Interest Earned: $54.00
  • Total Return (Deposit + Interest): $1,854.00

Example 2: Long-Term Lease

• Inputs:
  • Security Deposit: $2,500
  • Move-In Date: July 1, 2022
  • Move-Out Date: December 31, 2024
• Calculation: The deposit is held for 30 full months, which equals five 6-month periods. Using the same rate: Interest = $2,500 * 0.015 * 5.
• Results:
  • Total Interest Earned: $187.50
  • Total Return (Deposit + Interest): $2,687.50

For questions about what can be deducted, see our Guide to Deposit Deductions.

How to Use This Maryland Security Deposit Interest Calculator

1. Enter Deposit Amount: Input the total dollar amount of the security deposit you paid.
2. Select Lease Start Date: Use the date picker to choose the date the landlord received the deposit. This is typically your move-in date.
3. Select Lease End Date: Choose the date your tenancy officially ends or the current date if you are calculating interest mid-lease.
4. Click “Calculate”: The calculator will instantly show the total simple interest accrued and the total value of your deposit including interest.
5. Interpret Results: The primary result is the interest earned. The secondary result shows the total amount a landlord should return, assuming no damages are withheld. Exploring Tenant Rights in Maryland can provide additional context.

Key Factors That Affect Security Deposit Interest

• Tenancy Duration: Interest is only legally required if the deposit is held for six months or longer. The longer the tenancy, the more interest accrues.
• Deposit Amount: Interest is not required for deposits of $50 or less. For all other amounts, a higher deposit will naturally generate more interest.
• The Annual Interest Rate: The rate is tied to the 1-year U.S. Treasury yield and is updated annually. This means the interest earned can change from year to year.
• Lease Agreement Terms: While the law sets a minimum interest rate, a lease could theoretically specify a higher rate, which would be binding.
• Accurate Dates: Using the correct start and end dates is crucial for an accurate calculation, as interest is based on full six-month periods.
• Landlord Compliance: The entire process depends on the landlord following the law by placing the deposit in a proper account. A Small Claims Court Guide may be useful if a landlord fails to comply.

Frequently Asked Questions (FAQ)

1. What is the current interest rate for security deposits in Maryland?

The rate is the greater of 1.5% per year or the 1-year U.S. Treasury yield curve rate on the first business day of the year. The rate can change annually.

2. Is the interest compounded?

No. Maryland law requires simple interest, which is calculated on the original deposit amount only. Interest does not earn interest.

3. When is the interest supposed to be paid?

The landlord must pay the tenant the total accrued interest within 45 days after the tenancy ends, along with the base security deposit.

4. What if my landlord doesn’t pay me the interest?

If a landlord wrongfully withholds any portion of the security deposit, including accrued interest, a tenant may sue and recover up to three times the withheld amount, plus attorney’s fees.

5. Does my landlord have to give me a receipt for the deposit?

Yes. A landlord must provide a written receipt for the security deposit, which may be included in the lease. Failure to do so can result in a $25 penalty.

6. My lease was only 5 months long. Do I get interest?

No. The law states that interest is only required for deposits held for six months or more.

7. Can a landlord use my interest to cover damages?

Yes. The total amount returned to you is the deposit plus interest, minus any legally justifiable deductions for damages beyond normal wear and tear or unpaid rent. Learn more about your options with our Rental Dispute Navigation page.

8. Where can I find the official Maryland law on this?

The governing statute is the Maryland Code, Real Property § 8-203.

Related Tools and Internal Resources

Explore these resources for more information on renting in Maryland:

• Maryland Landlord-Tenant Laws: A complete overview of rights and responsibilities.
• Guide to Security Deposit Deductions: Understand what can and cannot be withheld.
• Tenant Rights Overview: A summary of key protections for tenants.
• A Tenant’s Guide to Small Claims Court: Steps for legal recourse.
• Navigating Rental Disputes: Tips for resolving conflicts with your landlord.
• Lease Agreement Checklist: Know what to look for before you sign.