Think of it as your shortcut to math you’d rather not do!
Just enter your deposit amount and the dates it was held, and our calculator instantly figures out how much interest your deposit has earned — using official city rates from places like Los Angeles, West Hollywood, and Santa Monica. No spreadsheets, no guesswork.

Anyone!
If you’re a tenant, use it to check whether you got the right amount of interest when you moved out.
If you’re a landlord, use it to make sure you’re paying exactly what’s owed (and staying compliant with city housing rules). Everybody wins.

Totally free. No sign-ups, no paywalls, and no hidden nonsense. Just clear, simple calculations you can use anytime.

Nope — we’re independent. But we use the same official interest rates published by your city’s housing department.
We just make the math and paperwork part way easier.

Directly from official city sources — like the Los Angeles Housing Department (LAHD) or the City of West Hollywood’s Rent Stabilization Division.
Each rate is verified before it’s added, so you’re seeing the same numbers the city uses.

Every year (or sooner if the city releases a mid-year change). As soon as a new rate is published, we plug it in — usually within a few days.

We currently support Los Angeles, West Hollywood, Santa Monica, and a few others that publish yearly security deposit interest rates.
We’re always adding more — check back often or subscribe for updates.

Absolutely! You can calculate interest for any date range — even ten years ago. The calculator applies the correct rate for each year and gives you a clean year-by-year breakdown.

Yes! Just enter your exact move-in and move-out dates. We automatically prorate the interest so you’ll see the most accurate number down to the day.

It’s simple interest — no compounding.
We take your deposit × the annual city rate × the number of days held.
Example:
$2,000 × 4.32% = $86.40 for that year.
Then we total everything up across all years. Done!

If you live in a city with rent stabilization (like Los Angeles or West Hollywood), landlords usually have to pay interest every year your deposit sits in their account.
Use our calculator to find out what that should look like — it takes seconds!

That depends on your city:

• Los Angeles: Every year and when you move out.
• West Hollywood: Usually at the end of your tenancy.
  Always check your city’s housing department to confirm exact rules.

Start by running the numbers here — then kindly share the total with your landlord.
Most of the time, it’s an honest oversight. If that doesn’t work, you can reach out to your city’s housing department to help sort things out.

Yes, that’s exactly what it’s for! Plug in your deposit, your dates, and your city. You’ll instantly see whether what you got matches what you were owed.

No — this calculator is made for residential tenants covered by city rent stabilization or deposit-interest laws.
Short-term rentals or commercial leases follow different rules.

Absolutely — and you should!
It’s a quick, accurate way to calculate deposit interest before refunding or issuing annual statements.
It saves time and helps avoid compliance issues with city housing ordinances.

A simple written summary showing:

• Tenant name and address
• Deposit amount
• Each year’s interest rate
• Total interest owed

Pro tip: print or attach the PDF report from our site — it looks clean and professional.

You can use the total result from the calculator and then divide it equally or by each tenant’s share of the deposit — whichever matches your lease terms.

Just enter their actual move-in and move-out dates. The calculator automatically prorates the interest for that partial year — no extra math needed.

Yes! Once your calculation is done, you can download a PDF summary that shows each year’s rate, the math, and the total owed. Perfect for your records or to share with tenants.

Yes — everything runs over HTTPS encryption. Your data is safe whether you’re on a laptop, phone, or tablet.

Of course! The site is designed to work smoothly on all devices — mobile, tablet, and desktop — with easy buttons and readable text. Try it while you’re on the go.

Just head to our Contact page and drop us a quick note.
Include the city name, year, and any supporting info — we’ll fix it fast.

No. Only certain cities — including Los Angeles, West Hollywood, and Santa Monica — require annual interest. Other cities may not have any deposit-interest laws.

If a rate isn’t out yet, the calculator uses the previous year’s rate until the new one is officially released. We update as soon as it’s published.

You can always verify at:

• Los Angeles Housing Dept: housing.lacity.org
• West Hollywood Rent Stabilization: weho.org/housing
• Santa Monica Rent Control Board: santamonica.gov

Not yet! Right now, it’s built for California’s cities with rent stabilization programs. But we plan to add more states soon.

Yes! You’ll get a clean, shareable PDF summary with your totals and year-by-year rates — ready to email or print.

It includes your city, deposit amount, interest rates per year, total earned interest, and an easy-to-read summary. It also includes a small disclaimer reminding users it’s for reference only.

Yes! It’s a perfect way to keep both sides on the same page.
Many landlords include it in their deposit return packet for transparency.

That feature is coming soon — property managers and landlords will be able to personalize their reports with their business name or branding.

They’re not city-issued documents, but they are accurate and professional records based on the same official data cities use.

Yes! We’re constantly expanding and improving — expect more cities, custom reports, and even comparison tools in the near future.

Yes — join our free mailing list to get a quick alert when your city releases its new rate each year.

We’re an independent team dedicated to making rental life easier — for both tenants and landlords. No big corporations, just transparency and helpful tools.

No. We’re not officially connected with any city or government office.
We just use their public data and make it much easier for you to work with.