A solo shed builder hands a customer the keys to a $9,800 12-by-24 lofted barn, takes a $300 down payment, and signs a 48-month rent-to-own contract for $295 a month. On paper that looks like a $9,800 sale. On the books, it might be a $14,160 lease, a $9,800 sales-type lease with deferred profit, or something in between — depending on whether you can repossess the building, what residual value you assign, and which state's tax rules apply. Get the classification wrong and you'll either overpay tax on phantom income or understate revenue badly enough to spook a bank when you apply for floor-plan financing.
The U.S. portable buildings sector is projected to reach about $62.87 billion in 2025 and continue growing past $100 billion by 2033, and a meaningful slice of that volume moves through rent-to-own (RTO) contracts that average 40–60% premiums over the cash price. The accounting for these contracts sits at the intersection of ASC 606, ASC 842 lessor accounting, sales tax nexus rules, and inventory floor-plan financing — a combination that catches many solo builders, multi-site dealer lots, and manufactured brands off guard.
This guide walks through the bookkeeping framework: how to classify each RTO contract, how to capitalize inventory and delivery equipment, how to handle multi-state sales tax on a delivery network, and which KPIs actually predict whether your lot is profitable.
The Three Business Models You Need to Distinguish
Before any accounting decision, identify which role you play in the transaction. The bookkeeping differs sharply across these three structures.
Solo Shed Builder
You build the building, sell it, and either deliver it yourself or pay a hauler. RTO contracts may or may not be in scope — if your contracts run more than 12 months and include a purchase option, you have a lessor accounting problem regardless of company size.
Multi-Site Dealer Lot
You display buildings on a sales lot, sell on behalf of one or more manufacturers, and originate RTO contracts. The manufacturer typically retains title until the contract is paid out, and you earn a sales commission plus an RTO origination fee. Your inventory accounting is dominated by floor-plan financing.
Manufactured Portable Building Brand
You manufacture sheds, carports, garages, cabins, or chicken coops in a central plant and distribute through an independent dealer network. You bear most of the RTO credit risk and book the consolidated lessor accounting on your statements.
The accounting choices that follow apply across all three, but the magnitude shifts dramatically. A solo builder might carry three open RTO contracts; a manufacturer might carry 12,000.
Classifying Each RTO Contract Under ASC 842
ASC 842 (the lease accounting standard) requires lessors to classify every lease as a sales-type lease, direct financing lease, or operating lease. The choice drives whether you recognize revenue upfront or over time.
The Five Classification Tests
For an RTO contract to be classified as a sales-type or direct financing lease, at least one of these must apply:
- Ownership transfers to the customer at the end of the term
- The contract contains a purchase option the customer is reasonably certain to exercise
- The lease term covers the major part of the building's economic life
- The present value of lease payments equals or exceeds substantially all of the building's fair value
- The building is specialized to the customer with no alternative use
Most 36-to-60-month RTO contracts for sheds will fail the "specialized asset" test (a 12-by-24 storage shed is generic) but pass the "purchase option reasonably certain" test if the contract requires only a nominal final payment to transfer title. They'll also generally pass the present-value test, since the total RTO payments substantially exceed the building's fair value.
That combination usually pushes RTO contracts into sales-type or direct financing classification rather than operating lease.
Sales-Type Lease Mechanics
In a sales-type lease, you derecognize the inventory and recognize:
- A net investment in the lease (present value of remaining payments)
- Selling profit (the spread between fair value and your cost) upfront
- Interest income over the contract term as the present value unwinds
For the $9,800 shed example with a $300 down payment and 48 monthly payments of $295: assume a 12% imputed rate, present value of payments roughly $11,500, fair value $9,800, carrying cost $6,500. You'd recognize about $3,300 selling profit at delivery and approximately $4,460 in interest income across the 48 months.
Operating Lease Mechanics
If the present value of payments is materially below the fair value (rare with RTO premiums), or if the contract is genuinely cancellable with no penalty, operating lease treatment may apply. You keep the shed on the balance sheet, depreciate it, and recognize rental income straight-line. This is the cleaner approach for short-term storage rentals.
Direct Financing Lease
Direct financing applies when a third party (usually the manufacturer or a finance company) guarantees a residual value or the customer's payments. The dealer recognizes interest income but no selling profit. Heritage-brand dealers operating under a manufacturer's master RTO program often land here.
Revenue Recognition Under ASC 606 for Outright Cash Sales
Cash sales of sheds are the easy case. Under ASC 606, you recognize revenue when control transfers to the customer — typically at delivery and setup completion.
Pay attention to these complications:
- Delivery and setup as separate performance obligations: If you charge a separate delivery fee, it's usually a distinct performance obligation. Recognize when delivery occurs, not when the building is sold.
- Anchoring, leveling, and tie-down kits: Bundled installation services in tornado-prone states are often a separate obligation. Allocate transaction price based on standalone selling prices.
- Customer-specific custom builds: Custom orders (special doors, wraparound porches, electrical pre-wires) may qualify for over-time revenue recognition if they have no alternative use and you have an enforceable right to payment for work-in-progress.
Repossession Reserves and Bad Debt Allowance
Industry studies of small-lot RTO dealers suggest 15–25% of contracts go to repossession before payout. Your accounting must reflect that reality.
Setting Up the Reserve
Establish an allowance for credit losses against your net investment in lease receivables. Build the reserve from your own loss history:
- Track contracts that defaulted within the first six months separately from later-stage defaults
- Net out repossession recovery proceeds (resale of the repossessed shed at typically 50–65% of original carrying value)
- Adjust quarterly based on roll rates (current → 30-day → 60-day → 90-day → default)
For a new lot without history, industry benchmarks of 18% gross default with 55% recovery on resale yield a net loss provision around 8% of net investment in lease.
Repossession Mechanics
When a shed is picked up by a mover/hauler and returned to the lot:
- Reclassify the net investment in lease balance to repossessed inventory
- Write down to net realizable value (resale price less refurbishment and transport)
- Record any difference as a charge against the loss reserve
- Pay close attention to state repossession laws — many require notice periods and a right to cure, and a botched repossession voids your recovery
Inventory, Floor-Plan Financing, and Section 263A
For dealer lots that don't manufacture, inventory accounting hinges on floor-plan terms.
Floor-Plan Mechanics
Manufacturers typically extend a 90-to-180-day interest-free curtailment window. After that, monthly floor-plan interest kicks in (often around prime + 4%). On the books:
- The building is your inventory once it lands on your lot, even if the manufacturer retains a security interest
- Floor-plan interest is a period cost, not capitalized into inventory under most small-business safe harbors
- If the curtailment expires and you owe the manufacturer the full wholesale price, treat the payable as a short-term note
Section 263A UNICAP
Builders that manufacture buildings in-house must apply Section 263A to capitalize indirect production costs (factory rent, supervisor labor, depreciation on jigs and lifts) into inventory unless they qualify as a small business taxpayer (gross receipts under approximately $31 million for 2026, indexed). Most solo builders qualify for the exception and can deduct overhead currently.
Depreciation on Yard, Mover, and CAD Equipment
The trade equipment you use to move and configure buildings is where Section 179 pays off.
Section 179 Limits
For 2025 and 2026, Section 179 maxes out at roughly $2.5 million per year (indexed) with a phase-out starting around $4 million in qualifying property purchases. Practical implications:
- A new forklift, mule, or skid steer with a fork attachment qualifies in full
- Custom mover trucks and gooseneck trailers used in-business qualify
- Site-delivery mules (small remote-controlled tractors that maneuver buildings into tight back yards) qualify
- CAD design software for custom builds qualifies as off-the-shelf software
Bonus Depreciation
Bonus depreciation rules under the One Big Beautiful Bill Act have shifted 100% bonus back in effect for qualifying property acquired after January 19, 2025. For property acquired before that date, the older 40%-or-60% phasedown applies. This makes large equipment purchases in 2026 attractive — but coordinate timing with Section 179 to avoid wasting deduction capacity.
Heavy-Duty Trucks
Mover trucks over 14,000 GVWR are not subject to luxury auto depreciation caps, so they can be fully expensed under Section 179 or bonus. Trucks under 6,000 GVWR are luxury-auto capped.
Multi-State Sales Tax Under Wayfair
Lot networks selling buildings into multiple states face the Wayfair economic nexus framework. Most states impose nexus once you exceed $100,000 in sales or 200 transactions in a 12-month period.
State-Specific Quirks for Sheds
- Texas, Florida, and Tennessee generally treat portable buildings under 200 square feet as tangible personal property, not real property — meaning state sales tax applies at delivery
- California and New York treat permanently affixed buildings (set on a foundation or anchored) as real-property improvements, often shifting tax to the materials only
- Some states include delivery and setup charges in the taxable base; others exempt separately stated delivery if optional
For RTO contracts, sales tax treatment varies again — some states tax the full RTO payment stream as if it were a sale, others tax each rental payment separately, and a few exempt RTO entirely if a true lease structure is preserved.
Bookkeeping Implication
Build a state-tax lookup table by ZIP code, set up sales tax payable accounts per state, and reconcile monthly. Tools like Avalara, TaxJar, or a well-structured spreadsheet feeding into your accounting system make this manageable.
Code Compliance Costs and Where They Land
Many builders mistakenly treat compliance costs as overhead when they should be capitalized into specific products.
- State manufactured-building code approvals (e.g., L-Sticker programs): capitalize as an intangible asset and amortize over the approval period
- IBC wind-and-snow-load engineering stamps for carports: charge to project cost if for a specific custom job; otherwise period expense
- EPA Lead-Safe practices for paint sites: training certifications are intangibles; consumables (HEPA filters, plastic) are inventory or expense
- DOT commercial vehicle compliance: vehicle expenses (capitalize the IRP plates, expense the IFTA filings)
Insurance Allocation
Two coverages dominate the books:
- General liability: typically allocated to each project on a square-footage or revenue basis
- Inland marine (covering buildings in transit between lot, customer site, and repossession recovery): a specialized policy that's often experience-rated; track losses by truck/driver to negotiate renewals
Premiums are deductible in the period covered. If you prepay a 12-month policy, set up a prepaid insurance asset and amortize monthly.
KPIs That Predict Lot Profitability
Three numbers separate profitable lots from struggling ones:
Average Build Margin
Cash-sale margin should run 28–38% on a basic shed and 35–45% on a finished cabin. Drop below 25% and you're not pricing inflation into your wholesale costs.
Lot Turn Days
How many days does a building sit on your display lot before sale? Industry benchmark is 75–110 days. Slower means you're over-inventoried; faster usually means you're under-displayed and losing impulse buyers.
RTO Default Rate
Track 12-month default rate by contract origination cohort. A trailing rate above 25% means your origination process is too loose — likely missing income verification or geographic concentration in distressed markets.
Per-Truck Delivery Revenue
For multi-site networks, daily delivery revenue per truck should exceed two-and-a-half to three times the loaded daily cost of the truck (driver, fuel, depreciation, insurance). Below that, you're delivering at a loss and subsidizing the lot's sales.
Keep Your Lot's Books Tight from the First Contract
A shed business looks simple from the outside — build, deliver, get paid. The accounting behind it is anything but simple, especially once you start originating rent-to-own contracts that mix elements of sales, financing, and leasing. Clean books from your first sale prevent painful restatements at tax time and make floor-plan and SBA lender conversations dramatically smoother.
Beancount.io provides plain-text, version-controlled accounting that gives you full transparency over every lease classification, depreciation election, and multi-state sales tax filing — without locking your data behind a vendor portal. Get started for free and bring the same engineering discipline your dealer manual demands to your general ledger.