Year-End Tax Checklist for Mobile Home Park Owners

By Harry Shurek, EA | The MHP Accountant®

Q4 is not the time to start thinking about your MHP taxes. It’s the time to act on everything you identified during the year — and to make the decisions that cannot be reversed after December 31.

Too many mobile home park owners hand their accountant a shoebox of documents in March and hope for the best. The owners who consistently pay less in taxes are the ones who spend Q4 like a tax professional: reviewing depreciation schedules, timing CapEx, confirming estimated payments, and setting up the next year for success.

This checklist covers every category that matters for MHP operators specifically. Work through it with your accountant before December 31. Not in January. Not at extension time. Before December 31.

Category 1: Depreciation and Fixed Assets

☐ Confirm All POH Additions Are on the Fixed Asset Register

Any park-owned home (POH) added during the year — whether purchased, moved in, or converted from TOH — must be on your depreciation schedule before year-end. POHs are depreciable assets (typically 27.5 years under MACRS as residential rental property). If they’re not on the register, you’re leaving depreciation deductions on the table.

☐ Review Land Improvement Additions for 15-Year MACRS Eligibility

Roads, parking areas, landscaping, fencing, and utility lines (to the extent they are not structural components of buildings) may qualify for 15-year MACRS depreciation. Under the current bonus depreciation rules, 15-year property may also qualify for bonus depreciation. Confirm with your accountant which additions made this year qualify.

☐ Decide Whether to Order a Cost Segregation Study

If you acquired a park this year — or did significant site improvements — a cost segregation study can reclassify portions of your investment from 39-year nonresidential or 27.5-year residential property to 5-year, 7-year, or 15-year MACRS categories, dramatically accelerating depreciation. The study must be completed and the method established before filing. Q4 is your window to engage a cost seg provider.

☐ Confirm Your Bonus Depreciation Election Strategy

Bonus depreciation under the Tax Cuts and Jobs Act is phasing down. Eligible property placed in service this year may qualify for first-year bonus depreciation under the phase-down schedule. Your election (or opt-out) must be reflected on your return. Discuss with your accountant whether taking bonus depreciation makes sense given your passive loss situation and anticipated future income. See our post on MHP taxes for W-2 owners — if you have W-2 income, bonus depreciation losses may be suspended anyway.

☐ Reconcile Disposals — Did You Remove Any Homes or Equipment?

If you demolished, sold, or abandoned a POH, removed infrastructure, or disposed of any other depreciable asset, the disposal must be recorded. Continuing to depreciate disposed assets creates phantom deductions that the IRS can challenge. Removing a fully depreciated asset is still a bookkeeping event.

☐ Consider a Catch-Up Depreciation Study (Tangible Property Regulations)

If you’ve owned your park for several years and never had a cost segregation study done, a look-back study under the tangible property regulations can capture missed deductions through an accounting method change on Form 3115. This is a one-time opportunity with a large potential benefit. Q4 is a good time to assess whether it applies to your park.

Category 2: Income and Expense Timing

☐ Reconcile Your Rent Roll to Your Accounting Records

Before year-end, pull a complete rent roll from your property management software and reconcile it to your QuickBooks (or equivalent) income records. Discrepancies — especially if you’re on the cash basis — should be identified and resolved before you hand records to your accountant. Lot rent, POH rent, RUBS income, and late fees should all reconcile independently.

☐ Decide on Year-End Capital Expenditure Timing

If you’re planning a capital project — road resurfacing, water line repair, new community building — the timing of when you place the asset in service affects which tax year you can begin depreciating it. Assets placed in service by December 31 are eligible for that year’s depreciation. Assets placed in service January 2 start the following year. This decision can be worth thousands.

☐ Apply the Repair vs. Capitalize Rules Before Year-End Invoices Are Posted

Under the IRS tangible property regulations (the “Repair Regs”), certain expenditures qualify as deductible repairs rather than capitalizable improvements. The analysis turns on whether the expenditure results in a betterment, restoration, or adaptation of a unit of property. Year-end is the time to review any large invoices posted to repairs and confirm the treatment is defensible. A $40,000 entry miscategorized as a repair expense will draw IRS attention.

☐ Review POH Repair Expenses for Capitalization Requirements

Repairs on park-owned homes that rise to the level of improvements must be capitalized and depreciated, not expensed. This is a common error in MHP books — an entire remodel of a POH running through repairs and maintenance. Separately, if you purchased a new POH and incurred setup costs (skirting, tie-downs, steps), those costs are typically added to the asset basis.

☐ Confirm Security Deposits Are NOT in Your Income

Security deposits are liabilities, not income. If your property management software posted any security deposits to revenue during the year, reverse them before year-end. Equally, if you applied security deposits to unpaid rent (because a tenant moved out owing rent), the applied amount is now income and should be recognized. This is a common area of error in MHP accounting.

☐ Check for Deductible Prepaid Expenses (12-Month Rule)

Under the 12-month rule, cash-basis taxpayers can deduct prepaid expenses if the benefit does not extend beyond the earlier of 12 months after the payment date or the end of the tax year following payment. Prepaying insurance premiums or service contracts before December 31 can accelerate deductions into the current tax year.

Category 3: Entity and Structure Review

☐ Verify Estimated Tax Payments Are Current

If your park ownership generates self-employment income or pass-through income above your withholding, quarterly estimated tax payments are required to avoid underpayment penalties. Confirm that Q1 through Q3 payments have been made and calculate whether a Q4 payment (due January 15 of the following year) is needed to meet the safe harbor. The safe harbor is generally 100% of last year’s tax liability (110% if AGI exceeded $150,000).

☐ Review Entity Structure for Changes That Should Take Effect January 1

Entity structure changes — adding an S-Corp management company, converting entity type, adding a new ownership entity for a recent acquisition — generally need to be in place at the start of a tax year to be effective for the full year. December 31 is effectively the deadline to set up a new entity and elect S-Corp status for the following year. Waiting until spring costs you a full year.

☐ Review S-Corp Owner Payroll for Year-End Accuracy

If you have an S-Corp management company, confirm that W-2 wages are at your documented reasonable compensation level and that all required payroll tax deposits have been made. Q4 is when many owners make a year-end payroll adjustment. Do this through payroll — not as an informal distribution reclassification. See our post on MHP owner salary vs. distributions.

☐ Confirm Retirement Plan Contributions Are Funded or Scheduled

Contributions to a SEP-IRA can be made up to the tax filing deadline (including extensions). Solo 401(k) contributions must be elected by December 31 if you’re establishing a new plan. The contribution deadline for elective deferrals is December 31; employer contributions can be made through the return due date.

☐ Review State and Local Tax Obligations

Confirm that your park’s real estate tax payments are current. In some states, property taxes on POHs titled as personal property (not affixed real estate) have separate assessment deadlines. If your park operates across state lines, confirm that each state’s estimated tax obligations are met.

Category 4: Planning for Next Year

☐ Schedule a Cost Segregation Study for Any Acquisition Planned for Q1

If you’re closing on a new park in early Q1, engage a cost segregation provider now so the study is ready to be incorporated into your return without extension pressure.

☐ Set Up Chart of Accounts for New Properties

If you’re adding a park to your portfolio, establish MHP-specific chart of accounts before the first transaction posts. Retrofitting books from a generic chart of accounts is expensive and error-prone. Start with the right structure from day one.

☐ Review Your Capitalization Policy Election

The IRS tangible property regulations permit taxpayers to elect a de minimis safe harbor for expensing items below a threshold ($2,500 per invoice for non-audited financial statement filers). If your park doesn’t have a written capitalization policy, establish one before the start of the new year to formalize this election.

Frequently Asked Questions

External Resource: IRS.gov — Estimated Taxes explains payment requirements and safe harbor rules.

Disclaimer: This post is for educational purposes only and does not constitute tax, legal, or financial advice. Tax law changes frequently. Every MHP owner’s situation is unique. Consult a qualified tax professional before making decisions based on this content. The MHP Accountant® is available for individual consultations at the contact information above.