Understanding Expenses, Revenue & Profit

Introduction to Solar Managerial Accounting

Solar is a build-and-collect business. Your cash gets tied up in site surveys, permitting, materials, subcontractors, and labor—then you wait for customer approval, incentives, and payment milestones. Managerial accounting helps you run the business using clear numbers for expenses, revenue, and profit. Instead of guessing, you learn where money is actually going and which job steps are hurting or helping your margins.

This module will help you answer four questions every week:
1) What did we earn?
2) What did it cost us to earn it?
3) How much profit did we actually keep?
4) Do we have cash available to keep installs moving?

Concept: Expenses (Solar Edition)

Expenses are the costs you incur to deliver solar—directly to each job and also to run your company. In solar, expenses often hide across multiple buckets:
- Direct job costs: permits paid, utility paperwork fees, engineering/design (if needed), panels/inverters/ballasts, racking, wiring, fasteners, consumables, on-site labor, and crane/boom time.
- Subcontractor costs: roofers, electricians, integrators, inspectors that you hire through partners.
- Operational costs: payroll for coordinators/estimators, vehicle costs, software subscriptions, office rent, accounting, marketing, chargebacks, and insurance.

Solar scenario: You win a job, but when you compare the estimate to what you actually paid, you see you undercounted electrical labor and paid extra for a re-design after the utility requested changes. That undercount becomes a margin leak. Managerial accounting forces you to track expenses by job step so you can fix the process—not just “work harder.”

Concept: Revenue (How Solar Gets Paid)

Revenue is the money you earn from your solar work. The tricky part in solar is that revenue shows up in milestones, not all at once. Common sources include:
- Customer deposits (before survey/design/materials)
- Progress payments tied to permitting, equipment delivery, or roof readiness
- Final payments after inspection/permission-to-operate
- Change orders (extra panels, different roof layout, additional structural work)

Solar scenario: A homeowner signs, pays a deposit, and then your schedule slips because permits took longer than expected. You might still look “busy” in the pipeline, but revenue you expected to land this month doesn’t arrive. That’s why revenue tracking must connect to job stages and payment events.

Concept: Profit First (Make Profit a Non-Negotiable)

Profit First changes how you think about money. Instead of “what’s left after expenses,” you set profit aside first.
A simple solar version:
- Revenue − Profit = Expenses

In practice, you decide a profit percentage (or a target dollar amount) and immediately allocate it when customer payments hit your business account—before you pay everything else.

Solar scenario: When a customer’s deposit clears, you split it instantly:
- Job deposit bucket (for survey/design/initial engineering)
- Tax bucket (sales tax/contractor tax needs, depending on your setup)
- Profit bucket (kept separate)
- Operating bucket (overhead + staffing)

This protects you from the “we’re busy but broke” cycle. If a job goes sideways, you learn it sooner because your profit allocation discipline won’t magically appear after the fact.

The Importance of Cash Flow Management (Solar’s Real Score)

Cash flow is the timing of when money comes in vs. when you must pay. Solar is notorious for timing gaps:
- You often pay design/engineering and schedule labor before final payments.
- Permitting delays postpone downstream payments.
- Equipment procurement can require deposits or early payments.
- Inspection rework and documentation issues can extend the time until final sign-off.

Solar scenario: You have $80,000 in signed contracts, but half are awaiting utility approval. You still owe subcontractors for roof work and you need to buy racking for the next batch. If you manage only your bank balance, you miss that those contracts aren’t cash yet.

So cash flow management means you track:
- Expected cash in by week (deposits, progress, final)
- Expected cash out by week (materials orders, subcontractors, payroll, insurance, software)
- Required minimum cash to keep installs moving (so you don’t pause production)

Conclusion

In solar, profit and cash are not the same thing—and managerial accounting helps you keep them straight. When you understand solar expenses by job step, track revenue by payment milestone, set profit aside early, and watch cash timing, you stop relying on hope. You’ll make faster decisions: which jobs to prioritize, where your estimates leak money, how to staff your schedule, and when to adjust operations to protect both margins and cash.