Mobile Home Park Utility Billing: Tax Treatment Explained

By Harry Shurek, EA | The MHP Accountant®

Utility billing in a mobile home park is more complex than it looks on the rent roll. Depending on how your park is set up — master-metered, submetered, or direct-billed — the income recognition, expense matching, and NOI presentation all change.

Get this wrong on your tax return and you either overstate income (by not deducting the utility cost), understate income (by netting when you should be reporting gross), or present your NOI in a format that confuses your lender.

Here is the complete tax treatment for each billing model.

The Three Utility Billing Models

Model 1: Master-Metered, Included in Lot Rent

In this model, the park has a single master meter for water, sewer, or both. The utility cost is paid directly by the park. Tenants do not receive a separate utility bill — the utility cost is built into the lot rent.

Tax treatment is straightforward. The lot rent you collect is fully taxable rental income. The utility cost you pay to the utility company is a fully deductible operating expense. There is no utility income line on your P&L — only a utility expense line.

The challenge with this model is NOI presentation. Because utilities are absorbed in the park’s expenses, the lot rent looks lower than parks where utilities are billed back to residents. When comparing NOI across parks or when presenting to lenders, this requires a utility inclusion adjustment.

Model 2: Submetered — Park Bills Back to Residents

In this model, the park installs individual submeters at each lot. The park pays the master-meter utility bill and then bills each resident based on their individual usage as recorded by the submeter. The billing may reflect the actual cost or may include a small administrative markup (subject to state law limitations).

Tax treatment: Both the income and the expense must be reported gross. You cannot net the resident billing against the utility cost and report only the difference.

• The submeter billings collected from residents are taxable income — report on your P&L as “Utility Income” or “Submeter Billing Income”
• The master-meter utility bill you pay is a deductible expense — report on your P&L as “Utility Expense”

If your park generates $8,000 per month in utility billings and pays $7,500 per month on the master meter, you report $8,000 as income and $7,500 as expense. The $500 difference is your net utility income. You do not report only $500 as income.

Model 3: Direct-Billed — Residents Pay the Utility Company

In this model, each lot has its own meter in the resident’s name. The resident pays the utility company directly. The park has no involvement in utility billing.

Tax treatment: No utility income, no utility expense on the park’s return. The park’s only involvement is in any utility infrastructure on the park’s side of the meter (pipes, distribution lines, meter boxes) — those infrastructure assets are on the park’s depreciation schedule as land improvements.

This is the cleanest model from a tax perspective and the most favorable for NOI presentation (all lot rent is net of utility cost).

Tax Treatment Summary by Model

How Utility Pass-Through Affects NOI Presentation

When presenting your park’s financials to a lender, buyer, or broker, NOI (Net Operating Income) is the key metric. Lenders and appraisers normalize the P&L to arrive at a stabilized NOI.

For parks with utility pass-through (submetering or RUBS), the normalized NOI presentation is gross. Gross Scheduled Income includes the lot rent plus the utility income. Operating expenses include the utility cost. The net flows through to NOI.

Do not present a P&L that shows utility income netted against utility expense — even if the net is small. Lenders expect to see both lines. A P&L that netted utility income and expense looks like the preparer does not understand MHP accounting, which undermines confidence in all the other numbers.

State Law Considerations on Utility Markup

Many states regulate how much a mobile home park can charge residents for utilities. Some states prohibit any markup above actual cost. Others permit a reasonable administrative fee. Some require specific meter accuracy standards and billing statement formats.

State utility regulations are not primarily a tax issue — they are a compliance issue. But they affect your income. If you are charging a markup that is not permitted under state law, the entire billing program may be challenged, which would require retroactive refunds that affect previously reported income.

Before implementing a submeter or RUBS program, confirm the applicable state regulations in the park’s state. This is not optional — several states have significant penalties for non-compliant utility billing practices.

Documentation Requirements for IRS Purposes

For utility income and expense to hold up on audit, you need:

• Master meter bills: Monthly statements from the utility company showing amount billed, payment, and the billing period. Keep 7 years of records.
• Resident billing records: Monthly statements or invoices issued to each resident showing the lot number, billing period, usage (if submetered), and charge. Your property management software (Rent Manager) should generate these automatically.
• Payment records: Evidence that residents paid the utility billings (checks, electronic payment records, ledger entries).
• RUBS calculation methodology: If using RUBS, document the allocation methodology (basis for allocation — occupants, lots, square footage), the calculation formula, and monthly calculation worksheets showing how the master meter cost was allocated to each lot.

How to Set Up Utility Billing Correctly in QuickBooks

The QuickBooks setup for utility billing should mirror the gross reporting requirement:

1. Create a separate income account: “Utility Income — Submeter” or “Utility Income — RUBS”
2. Create a separate expense account: “Utility Expense — Water/Sewer” (or by utility type)
3. Post resident utility billing collections to the income account
4. Post master-meter payments to the expense account
5. Never net these two accounts against each other in QuickBooks — the P&L will show both lines

Your property management software (Rent Manager) should track the utility billing at the lot level. The monthly totals from Rent Manager flow into QuickBooks as the utility income line. See our post on MHP accounting software for the integration setup.

Frequently Asked Questions

Disclaimer: This article is for general informational purposes only and does not constitute tax, legal, or financial advice. Tax laws change frequently and individual circumstances vary. Consult a qualified tax professional before making any decisions based on the information contained herein. The MHP Accountant® is a tax preparation and advisory firm; nothing in this article creates a client relationship.