What Is RUBS and How Does It Affect Your MHP Taxes?

By Harry Shurek, EA | The MHP Accountant®

RUBS shows up on every MHP operator’s radar eventually — usually when they are analyzing a park acquisition and the current owner is using it to recover utility costs, or when their own utility bills are climbing and they are looking for a pass-through solution.

What RUBS is operationally is easy to explain. How it affects your tax return is where most operators — and their accountants — get it wrong.

This post covers both.

What Is RUBS?

RUBS stands for Ratio Utility Billing System. It is a method of allocating master-meter utility costs to individual residents without individual submeters. Instead of measuring each resident’s actual usage (which requires a physical submeter), RUBS estimates each resident’s proportionate share of the total utility cost based on a proxy ratio.

The allocation ratios most commonly used are:

• Occupants per lot: Each resident’s share of the utility cost is proportional to the number of people living in their home relative to the total number of occupants in the park
• Lots (equal split): Total utility cost divided equally among all occupied lots
• Square footage: Proportional allocation based on the square footage of each home

The allocation method is established in the RUBS policy and disclosed to residents, typically in the lease agreement or a utility addendum. Once the master meter bill arrives, the total is allocated according to the formula, and each resident receives a RUBS charge in addition to their base lot rent.

Why Parks Use RUBS Instead of Submetering

Submetering — installing individual meters at each lot — is the most accurate method of utility cost recovery. But it has upfront capital costs (meter installation, plumbing work, electrical connections) and ongoing administrative requirements (reading meters, calculating usage-based charges).

RUBS requires no capital investment beyond the administrative setup. There is no meter to install. The allocation happens in your property management software. For parks where the utility infrastructure makes individual metering impractical or costly, RUBS is the alternative.

The tradeoff is accuracy. RUBS allocations are approximations. Some residents will pay more than their actual usage; others will pay less. This is generally acceptable and legally permissible in most states, subject to disclosure requirements and in some states, caps on the total RUBS charge relative to the actual utility cost.

How RUBS Affects Your MHP Taxes

The tax treatment of RUBS income is not complicated once you understand the gross reporting requirement. But it is routinely mishandled on returns prepared by professionals who are unfamiliar with MHP billing practices.

RUBS Income Is Taxable Revenue

Every dollar you collect from residents through RUBS charges is taxable income to the park. This is true even if the RUBS charge exactly equals the underlying utility cost — there is no “pass-through” exclusion from income for RUBS billings. You collected money. It is income.

The Underlying Utility Cost Is Deductible

The master-meter utility bill you pay to the utility company is a deductible operating expense. This is the matching deduction for the RUBS income. Report both:

• RUBS collections from residents → Income (gross)
• Master-meter utility payments → Expense (gross)

Never Net RUBS Income Against Utility Expense

The single most common error on MHP returns with RUBS programs: the preparer nets the RUBS income against the utility expense and reports only the difference (or nothing, if they are approximately equal).

This is wrong. The IRS requires gross reporting. Your lender requires gross reporting. Your P&L should show both lines — utility income and utility expense — not a single net figure or no figure at all.

See also our post on MHP utility billing tax treatment for the full billing model comparison.

How RUBS Affects NOI Presentation

NOI is the number lenders, buyers, and appraisers use to value your park. RUBS income, presented correctly, increases your NOI and therefore increases your park’s value.

Here is why: a park that absorbs utility costs without billing back to residents shows lower NOI than a park that bills back through RUBS. The first park’s lot rent is $350 and utilities cost the park $75 per occupied lot. The second park’s lot rent is $350 and RUBS billing adds another $70 per occupied lot. The second park’s NOI is $70 per lot higher.

At a 7% cap rate, $70 per lot per month × 12 months × 100 lots = $84,000 of additional NOI = $1,200,000 of additional value.

The RUBS income must be visible on the P&L for this value to be captured in an appraisal or sale. If it is netted away or omitted, the park looks lower in value than it actually is.

RUBS Income on the Tax Return: Specific Line Items

For individual owners filing Schedule E, RUBS income is reported on the “Rents received” line of Schedule E Part I. It is rental income — do not separate it onto a different form. For entities filing Form 1065 or 1120-S, it flows through the rental income schedule on the return.

Your QuickBooks chart of accounts should have a dedicated “RUBS Income” account under the income section. Post RUBS collections to this account monthly. The master-meter utility bills go into the “Utility Expense” account. See our post on MHP accounting software setup for chart of accounts configuration guidance.

RUBS Documentation Requirements

To support RUBS income and expense on your tax return, maintain:

• Monthly RUBS calculation worksheets showing the total master-meter utility cost, the allocation ratio used, the number of participating lots, and the charge per lot
• Monthly RUBS billing statements issued to each resident (generated by your property management software)
• Payment records showing RUBS collections by lot and by month
• Master-meter utility company statements for each billing period
• The RUBS policy document and any lease addendum disclosing the program to residents

Keep these records for at least seven years. In an audit, the IRS examines both the income side (did you report all RUBS collections?) and the expense side (did you pay the utility bills you are deducting?). Clean documentation answers both questions immediately.

RUBS vs. Submetering: Tax Comparison

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.