Tracking Your Money & Keeping Records

Understanding Cash Flow

In manufacturing, cash flow is not just “money in and out.” It’s survival tied to purchase orders, long supplier lead times, inventory build-ups, and payroll timing. Cash flow is the movement of money in and out of your business over time. When cash is tight, the shop keeps running only because you manage timing—what you pay and when.

Use the same simple bucket idea, but translate it to your world: cash enters when customers pay (often after delivery and sometimes after a dispute window). Cash leaves when you pay for raw materials, freight, energy, maintenance, subcontracting, and labor—often before customers have paid. If expenses consistently outpace incoming cash, the “bucket” empties and you’ll feel it first in delayed payments, missed production commitments, and tense supplier conversations.

The Importance of Basic Records

Accurate records are your financial map. In manufacturing, “good records” means you can answer, quickly, what each job and each product line is really doing to cash—not just to profit on paper.

Start with these basics:
- Sales and cash collected by date (not just invoices issued)
- Purchases and cash paid by date (not just bills received)
- Payroll and major overhead due dates
- Inventory movements and large buys (steel, castings, electronics, chemicals, packaging)
- Any downtime-related costs you track (expedites, scrap, rework)

Why it matters: without reliable records, you miss the early warning signals. You might think you’re fine because the P&L shows “profit,” while the bank account shows you’re short—usually due to inventory tied up or customers paying slower than expected.

Real-World Scenario

Imagine a job shop that runs CNC machining for medical device components. In March, they win two orders that require upfront tooling and a specialty material with a 6-week lead time. Production starts, parts ship, and revenue gets invoiced. But customer payment terms are Net 60.

During March and April, cash leaves fast:
- Tooling deposits
- Material purchases
- Overtime to meet deadlines
- Freight and expediting charges

By the time payments arrive in May, the shop has already committed money across inventory and labor. If the owner only checks finances when taxes are near, they won’t notice the squeeze until they can’t pay the next material order. On the other hand, if they track cash by week and watch upcoming bills, they can decide early—adjust payment terms, phase material buys, negotiate deposits, or pause non-critical projects.

The Bootstrapper’s Ledger

You don’t need complex software to build control. A bootstrapper’s ledger is a simple weekly list of income and expenses that gives you two outcomes: your burn rate and your runway.

How to set it up for manufacturing:
1) Create a weekly sheet with two sections: Cash In and Cash Out.
2) Record cash received from customers by date.
3) Record cash paid to suppliers and for overhead by date.
4) Highlight “big rocks” that swing cash: material replenishments, tooling deposits, freight, and scheduled maintenance.

Then calculate:
- Burn rate: weekly cash out minus weekly cash in (when negative, you’re spending more than you bring in)
- Cash runway: how many weeks (or months) you can cover cash out with current cash reserves at the current burn rate

This becomes your early warning system. You’ll see if a material spike or a slow-paying customer is turning into a cash crunch.

Forecasting and Decision Making

Forecasting cash flow lets you make shop-floor and purchasing decisions with confidence. You don’t guess—you plan around reality.

In manufacturing, forecasting typically answers questions like:
- Can we buy the next material lot without risking payroll?
- Should we staff up for the next 30 days or hold until customer payments land?
- If a customer is late, what supplier payments must we delay?
- How much cash cushion do we need before we take on a new job that needs deposits?

Example of a practical decision: If your runway is 10 weeks, you should treat it as a constraint. You might request a 30–50% deposit for new jobs, negotiate Net 30 for repeat customers, or shift the purchase schedule so you don’t pay for all material before production is ready.

Conclusion

Cash flow and basic records are the foundation for safe growth in manufacturing. When you track cash weekly and keep clean records, you catch problems before they hit the bank account. Forecasting then turns your numbers into decisions—about purchasing, staffing, and quoting.

Bottom line: profit is not the same thing as cash. Your ledger and runway tell you whether your next production cycle is funded.