Installment Sale vs Lump Sum: Which Exit Structure Is Better for MHP Sellers?

You’ve received an offer on your mobile home park. The buyer qualifies, the price is right, and now you’re facing a question that most MHP sellers don’t think about until they’re sitting across from a closing attorney: do you want all your money now, or do you want to carry a note?

The answer has massive tax and financial implications. An installment sale can spread your gain across multiple years, potentially keeping you out of higher tax brackets. A lump sum gives you immediate liquidity and eliminates counterparty risk. Neither is universally better — but the wrong choice for your situation can cost you significantly.

This post lays out both structures side by side so you can evaluate them with your CPA before you’re under contract and the clock is already running.

The Lump Sum Exit: Clean, Simple, and Fully Taxed Upfront

A lump sum sale is what most people picture when they think of selling real estate. The buyer pays the full purchase price at closing — typically financed through a bank or institutional lender — and you receive your net proceeds in one transaction. You report the entire gain on your tax return for the year of sale.

From a tax standpoint, the lump sum is the simplest structure. All of your Section 1245 recapture, all of your unrecaptured Section 1250 gain, and all of your long-term capital gain are recognized and reported in a single tax year. Depending on the size of your park and how long you’ve held it, this can be a very large number hitting your return in one year.

That simplicity cuts both ways. The paperwork is clean, your obligation to the buyer ends at closing, and you have full liquidity to do whatever you want with the proceeds — reinvest, buy another park through a 1031, put it in the market, or retire. There’s no ongoing administrative burden, no credit risk, and no interest income to manage year after year.

The downside is the tax concentration. All that gain in one year means one large payment to the IRS, and if the gain pushes your income high enough, it can also trigger the 3.8% Net Investment Income Tax (NIIT) on the capital gain portion and potentially push ordinary recapture into the highest federal bracket.

The Installment Sale: Spreading the Gain Across Years

An installment sale — governed by IRC §453 — allows you to recognize gain proportionally as you receive payments rather than all at once. Instead of the buyer borrowing from a bank, you become the lender. The buyer makes payments to you over time, and each payment has three components: return of basis, gain (capital or ordinary), and interest.

The gain-spreading benefit is real. If your park has a gross profit percentage of 60% (meaning 60 cents of every principal dollar received is gain), and you receive $500,000 per year in principal payments, you recognize $300,000 of gain per year instead of recognizing $3 million in year one. For sellers in or near high tax brackets, spreading the gain can keep them at lower rates each year.

The Recapture Exception: Year One Recognition

Here’s the critical rule that catches MHP sellers off guard: Section 1245 recapture cannot be deferred in an installment sale. Under IRC §453(i), all Section 1245 recapture must be recognized in the year of sale regardless of how payments are structured. You can structure beautiful installment payments, but the IRS requires you to recognize all your ordinary income recapture upfront.

For MHP owners with significant park-owned homes, cost-segregated personal property, or equipment, this means the installment sale tax benefit is more limited than it first appears. The ordinary income recapture hits in year one. Only the capital gain portion — unrecaptured Section 1250 gain and long-term capital gain above original cost — actually spreads across payment years.

Interest Income: Ordinary Rates All the Way

Every installment payment you receive contains an interest component. That interest is taxed as ordinary income — not capital gain rates. If you’re carrying a note at 7% over 10 years on a $3 million balance, you’ll receive significant interest income over the note term, and every dollar of that interest is taxed at your marginal ordinary income rate.

The total interest collected over the life of a seller-carry note can be substantial. Model the total interest income and its tax cost when comparing installment vs lump sum.

Imputed Interest: The AFR Floor

If you charge the buyer an interest rate below the Applicable Federal Rate (AFR) published monthly by the IRS, the IRS will “impute” interest at the AFR anyway. You’ll owe tax on interest income you didn’t actually collect. This is a trap for sellers who offer below-market interest rates as a deal sweetener. Always price your seller carry note at or above the current AFR. Your CPA can check the current AFR at the time of closing.

Credit Risk: You Are Now the Bank

When you carry seller financing, you take on the risk that the buyer defaults. This is the most significant non-tax risk of the installment structure.

If the buyer stops paying, you have legal remedies — foreclosure on the property, deficiency judgments in some states — but reclaiming a mobile home park from a defaulting buyer is a lengthy, expensive process. Meanwhile, you’ve already recognized some gain and paid tax on it. Recovering the property doesn’t give you back the tax you paid on gain from payments you never received (though IRC §1341 and bad debt provisions offer partial relief in some circumstances).

Before agreeing to carry any seller financing, evaluate the buyer’s creditworthiness as seriously as a bank would. Review financial statements, credit history, operating experience, and the strength of their business plan for the park. A creditworthy buyer with a track record in MHP operations is a very different counterparty than a first-time buyer stretching to close.

The safest installment sales are those where the buyer is putting significant equity into the deal (meaningful down payment, not just assuming your obligations), has demonstrated management experience, and has the financial reserves to weather a bad quarter at the park.

When Installment Sale Makes Sense

The installment structure works best when:

• Your Section 1245 recapture is modest relative to total gain, so deferring the capital gain component is meaningful
• You have a large capital gain above your basis (the portion that can actually spread across years)
• The buyer is creditworthy with demonstrated management capability
• Spreading gain across years keeps you below a meaningful bracket threshold each year
• You want ongoing income from the note rather than a lump sum you’d have to reinvest
• You cannot identify a satisfactory 1031 replacement property and want to defer some gain

When Lump Sum + 1031 Is Better

The lump sum combined with a 1031 exchange is generally the stronger strategy when:

• You want to redeploy capital into a new income-producing property
• Your recapture exposure is high and the installment deferral benefit is limited
• You don’t want ongoing management of a seller carry note
• The buyer is institutional or using conventional financing and won’t accept seller carry
• You want clean liquidity for estate planning, DST investment, or other passive reinvestment

A 1031 exchange defers all gain — recapture and capital gain — and has no counterparty risk once the exchange is complete. The tradeoff is that you must reinvest all proceeds in like-kind property within strict IRS deadlines. For more on 1031 options at exit, see our post on Delaware Statutory Trusts as a 1031 exit option.

Comparison Table: Lump Sum vs Installment Sale

One More Option: Combining Both Structures

Some MHP exits use a hybrid: the buyer pays a large down payment at closing (triggering the lump sum recapture and some gain recognition), with a seller carry note for the balance. This gives you partial liquidity, partial deferral, and a smaller note to manage. It can work well when the down payment is large enough to cover your recapture tax and leave meaningful liquidity, while the note defers the remaining capital gain across a shorter payment schedule.

The structure needs careful modeling. Every combination produces a different year-by-year tax picture. Your CPA should model the after-tax cash flow for each scenario before you agree to deal terms. See also our guide on depreciation recapture mechanics and how to prepare your financials before listing.

FAQ

For official IRS guidance on installment sales, see IRS Publication 537: Installment Sales.

Internal links: Depreciation Recapture When You Sell Your MHP | DSTs as a 1031 Exit Option | Clean Up Your Books Before Listing

Disclaimer: This post is for educational and informational purposes only and does not constitute tax, legal, or financial advice. Tax laws change and individual circumstances vary. Consult a qualified tax professional before making any decisions regarding the sale of your mobile home park. The MHP Accountant® is an enrolled agent firm; engagement of professional services is required for personalized advice.