How-to MeterEase blog

A water leak spiked the shared bill. Who pays?

By MeterEase · Published October 16, 2026

On a shared water meter, one running toilet raises the bill for every unit. If your lease splits water by formula, a leak in one apartment, or in the building’s own pipes, can show up as a higher share for tenants who did nothing wrong. Here’s how to handle it.

This is general information, not legal advice. What you can bill depends on your lease and on state and local rules.

Step 1: Confirm it’s a leak

Compare the bill with last month and the same month last year. A jump with no change in occupants, season or billing days points to a leak. The U.S. EPA’s WaterSense program suggests two checks:

Meter test. Read the water meter, use no water for two hours, and read it again. If it moved, water is going somewhere.
Dye test for toilets. Put a few drops of food coloring in the tank and wait 10 minutes. Color in the bowl means the flapper is leaking.

EPA says the average household’s leaks can waste more than 9,300 gallons a year, and that a faucet dripping once per second can waste more than 3,000 gallons a year. Small leaks add up.

Step 2: Find and fix it

Ask tenants to report running toilets and drips, then check each unit and the common areas: toilets, faucets, water heater relief valves, irrigation lines and outdoor spigots. Fix it promptly; every day costs every unit.

Step 3: Ask the utility about an adjustment

Some water utilities offer a one-time leak adjustment or credit once the leak is repaired, usually with proof such as a plumber’s invoice or receipt. Policies vary, so call yours. Any credit should flow through to the tenants who paid the higher share.

Step 4: Decide who carries the extra cost

There’s no single rule, but these are common approaches:

A building or common-area leak (main line, irrigation, a common laundry): many landlords pay the extra cost themselves, since tenants got nothing for it. The D.C. Attorney General’s consumer alert on RUBS, for example, says formula billing should not include charges for retail or non-residential spaces, because residents get no benefit from utilities used there.
A leak inside one unit that the tenant reported quickly: treat it as a repair. Many landlords absorb the extra or spread it as usual.
A leak a tenant caused or ignored: your lease and local law decide whether you can charge that tenant. Don’t single anyone out without checking both.

Whatever you decide, apply it the same way each time.

Step 5: Tell tenants before the bill goes out

A one-line note heads off most questions. For example:

Hi [Name],

This month’s water bill was higher than usual because of a running toilet we found on [date]. It’s fixed. [We’ve taken $__ off the building total before splitting it, so your share only reflects normal use.] The bill and the math are attached.

Then show the adjusted total and each share on the statement, the same way you always do.

Example with made-up numbers

A fourplex’s water bill is usually about $400. This month it’s $580 because of a leaking flapper in the common laundry. The landlord estimates the leak cost $180 and pays it. The tenants split $580 − $180 = $400 as usual, so their shares look like a normal month.

Prevent the next one

Ask tenants to report leaks, and make it easy.
Check toilets and under-sink lines at turnovers and annual inspections.
Read the meter monthly so a jump shows up before the bill does.

MeterEase emails each tenant their share with the math and the bill attached, after you review it, unless you turn on auto-send for a property, so you can take out a leak adjustment and add a note before anything goes out. See how it works.

Split the bill and email every tenant in minutes

MeterEase reads the master bill PDF, applies your method and vacancy rule, and emails each tenant their share with the math shown and the source bill attached, after you check the numbers, unless you turn on auto-send for a property. Plans start at $14/month.

Sources

Example numbers in this post are made up to show the math. This post is general information, not legal advice; rules differ by state, city and utility. Check your lease and local rules.