Who Pays for What on a Solar Project, the Money Flow Explained
By Seamless Home Team, Solar fulfillment operations · August 14, 2026
Quick answer
On a financed residential PV solar project the homeowner usually pays nothing up front. The lender pays, in stages tied to milestones. Between those stages somebody has to fund equipment, labour, permit fees and design work before the money arrives. That gap is working capital, and who carries it is the single most consequential commercial question in the structure. Contract value is also not what the seller receives: dealer fees, equipment, labour, permitting and design all come out of it, and the timing of each outflow rarely matches the timing of the inflows.
Most explanations of residential PV solar economics stop at the contract value. That is the least useful number in the whole structure, because almost none of it reaches the seller, and none of it arrives when the costs do.
Following the money properly explains most of what otherwise looks like bad luck: why profitable companies run out of cash, why funding delays hurt more than thin margins, and why the working capital question decides which organisations can grow.
The homeowner's side
On a financed project, the homeowner typically pays nothing up front. The lender disburses funds against milestones, and the homeowner begins paying the lender under the terms of their agreement.
The structures differ in who owns the system and therefore who is responsible for it, which is the substance of TPO vs loan vs cash:
| Structure | Who owns the system | How money reaches the project |
|---|---|---|
| Loan | The homeowner | Lender disburses against milestones |
| Lease / PPA | The financing party | The system owner funds against milestones |
| Cash | The homeowner | Paid directly on a schedule set in the contract |
One practical note for homeowners: be cautious about large deposits before any work has begun. A modest deposit is ordinary. A substantial payment before design, permitting or materials is a risk concentrated entirely on your side.
Where the contract value actually goes
From the seller's perspective, contract value is the top of a subtraction, not revenue:
- Dealer fee retained by the lender: variable by product, rate and term, and frequently the largest single deduction.
- Equipment: panels, inverter, racking, and a battery where included.
- Labour: the installation crew, whether employed or subcontracted.
- Design and engineering, internal cost or paid to a provider.
- Permit fees, set by the jurisdiction, paid before work starts.
- Adders and change orders: roof work, electrical upgrades, trenching, structural remediation. Frequently the difference between an expected margin and the real one.
- Overhead and sales cost: commissions, marketing, the cost of originating the sale.
The dealer margin calculator exists because doing this subtraction reliably, before committing to a project, is more useful than discovering the answer afterwards, and the adder margin calculator prices the change orders that most often move the result. Both sit in the free tools library.
The timing problem
Here is the part that catches people, and it is a timing problem rather than a margin problem.
Money goes out early. Money comes in late.
Design, engineering and permit fees are spent before anything is installed. Equipment usually has to be bought and delivered before installation. Labour is due at or shortly after installation. Meanwhile funding arrives in stages: often a portion after contract and documentation, a larger portion after installation, and a final portion after inspection or permission to operate.
Every step in between, permit review, an AHJ correction, scheduling, inspection, utility interconnection and PTO, extends the gap. None of those steps care about your cash position, and a draw that comes back for correction extends it again; the funding packet checklist covers what each one has to evidence.
Who carries the gap
This is the question that decides how a PV solar organisation can operate.
The sales organisation carries it. Common where a sales org buys materials and pays an installer, then waits for funding. It requires real capital and caps how many projects can run at once, regardless of how many can be sold.
The installer carries it. The installing company fronts materials and labour and is paid on completion or on funding. Common, and hard on installers, who are typically the least capitalised party.
The lender's schedule reduces it. Products that pay earlier or in more stages shrink the gap. This is a genuine reason to weigh funding speed alongside dealer fee when comparing lenders, see what lender-agnostic means.
Material procurement is restructured so nobody fronts it. Removing the equipment cost from the gap changes its size materially, because materials are usually the largest single early outflow. That is what Direct Pay does.
A fulfillment partner carries it. Where one licensed contractor handles procurement, labour and permitting, the gap sits with that party rather than with the seller.
Change orders and adders
Worth calling out separately, because they are where predicted economics most often diverge from actual.
A main service panel upgrade, unexpected structural work, a re-roof discovered at survey, trenching for a ground mount, or an AHJ requirement that changes the design. All add cost after the price was set.
Two questions decide whether these are manageable or corrosive:
- Who approves them, and is that documented before work proceeds?
- Who pays, and is that agreed in advance rather than argued afterwards?
Where these are settled in the agreement between the parties, adders are a pricing exercise. Where they are not, they become disputes at exactly the moment everyone is already under pressure. This is core to what a subcontractor agreement should cover.
The underlying rule is about timing rather than cost: what a solar adder is and who actually pays for it walks through why the same panel upgrade is margin when it appears on the proposal and a direct loss when it appears on the survey report.
A worked way to think about it
Rather than invent figures, use the shape:
- Start with contract value.
- Subtract the dealer fee for the specific product and term.
- Subtract equipment, labour, design and permit fees.
- Subtract realistic adders, based on your own history rather than the best case.
- What remains is gross margin, before overhead and sales cost.
- Now ask a separate question: how many weeks is your capital committed, and how many such projects can you run at once?
Step 6 is the one most often skipped, and it is the one that determines whether the business can grow.
How Seamless Home structures it
Seamless Home is a licensed contractor, and the point of the structure is that financing, materials and labour sit with one accountable party instead of being assembled per project.
Materials are procured through Direct Pay so the seller does not front equipment cost. Financing runs across a multi-lender panel. The installation is performed and permitted under our licence, which makes us the contractor of record rather than a party coordinating between others.
The practical effect is on the gap: fewer separate parties each carrying a piece of it, and the largest early outflow removed from the seller's balance sheet. Coverage is confirmed per service area rather than promised as blanket availability.
The bottom line
Contract value is the start of a subtraction. What reaches the seller is what remains after dealer fees, equipment, labour, design, permits and adders, and it arrives in stages, later than the costs.
The gap between those two timelines is working capital, and who carries it matters more to whether a PV solar organisation can grow than almost any other variable.
Want to see what this looks like with the materials cost removed from the gap? Get in touch.
Frequently asked questions
Does the homeowner pay anything up front for solar?
On most financed residential PV solar projects, no. The lender disburses funds, typically in stages tied to milestones such as contract signature, installation completion and final inspection or permission to operate. Cash purchases follow a schedule set in the contract instead. Be cautious about arrangements requiring large homeowner deposits before any work has started.
Who pays for the equipment on a solar project?
Whoever is procuring it, and that depends on the structure. Traditionally the installing company or the sales organisation buys materials and is reimbursed later from funding, which means fronting the cost. Some arrangements shift material procurement so the seller does not front it. Either way the cost is ultimately covered from project revenue. The question is who carries it in the meantime.
What is a dealer fee in solar financing?
It is the amount the lender retains from the contract value in exchange for providing the financing product, varying by lender, product, rate and term. It is frequently the single largest deduction between contract value and what the seller actually receives, and it is why comparing lenders on fee alone is misleading, funding speed and stipulation rates affect the real economics too.
When does a solar seller actually get paid?
In stages, and later than most people expect. A first payment often follows contract signature and documentation, with a larger payment after installation and a final portion after inspection or permission to operate, depending on the product. The full cycle from sale to final payment commonly runs weeks to months, and every delay in permitting or inspection extends it.
Who pays for permits and design?
These are project costs, usually incurred by whoever is responsible for fulfillment, and they are paid before any funding milestone is reached. Permit fees are set by the jurisdiction. Design and engineering are either an internal cost or paid to a provider. Both are spent early and recovered late, which is part of why the working capital gap exists.
What happens to the money if a project is cancelled midway?
It depends on when and on what the contract says. Costs already incurred, design, permit fees, ordered equipment, do not disappear. Well-drafted agreements state who bears them at each stage and whether any funds already disbursed must be returned. This is exactly the scenario that ambiguous paperwork handles badly.
How do I work out what a project is actually worth to me?
Start from contract value, subtract dealer fee, equipment, labour, design, permit fees and any adders or change orders, then consider how long your capital is committed before funding arrives. A project with good gross margin and a long funding cycle can constrain a business more than a thinner one that funds quickly.