Accounting _Ver01. _「Manufacturing Cost Management- Why Financial Accounting and Management Accounting Never Match- and How Companies Can Finally See “One Truth”

Mar 1, 2026

Spring is finally around the corner-although the wind is still strong. We were hoping the recent rain would ease the water shortage, but it seems we still need more. Today's topic is manufacturing cost management.

Introduction

Inside many companies, numbers that should be identical often appear in three different versions:

• The financial accounting numbers produced by the accounting department

• The project-based numbers managed by the shop floor (close to management accounting, but not exactly the same)

• The “real” numbers that management wants to see

Even within the same company, the numbers don’t match. This is not because someone is wrong—it's because each group is operating under a different worldview.

Financial Accounting: The “Vertical World”

Financial accounting aligns numbers by periods—monthly, quarterly, and annually.

• Inventory adjustments

• Provision entries

• Replacing standard cost with actual cost

• Tax, banking, and audit requirements

Its purpose is to present accurate numbers to external stakeholders. Therefore, it rarely matches the in-progress status of individual projects.

Management Accounting: The “Horizontal World”

Management accounting aligns numbers by projects, products, and customers.

• Labor hours

• Outsourcing costs

• Material consumption

• Project profitability

Its purpose is decision-making and improvement at the project level. Naturally, this creates a mismatch with financial accounting.

The “Three Kingdoms of Numbers” in Mid-Sized Manufacturers

In many mid-sized companies:

• The financial system (for accounting)

• The production management system (for operations)

are completely separated.

As a result:

• Accounting → Financial numbers (accurate but disconnected from operations)

• Shop floor → Excel-based project tracking (realistic but not standardized)

• Management → Unsure which numbers to trust

This creates a world where no One Truth exists.

How Can a Company Create “One Truth”?

The answer is simple:

Use “standard rate × actual labor hours” during the period, and replace it with the “actual rate” at period-end - plus project-level provisions.

This aligns financial accounting, management accounting, and shop-floor numbers.

Step 1: During the Period — Use Standard Rate × Actual Hours as the Common Number

Labor hours entered into the core system represent actual shop-floor performance. By multiplying these hours by the standard rate, the company can use the same number for:

• Project cost

• Manufacturing cost in financial accounting

• Management decision-making

This becomes the One Truth during the period.

Step 2: At Period-End — Replace with the Actual Rate

At period-end, actual labor and overhead costs become clear.

• Actual labor cost

• Actual labor hours → Actual rate is determined

Using the system’s “rate replacement” function (or Excel if unavailable), the company updates the numbers.

This makes financial accounting and project cost fully consistent.

Step 3: Reflect Project-Level Provisions

Projects always involve expected or pending costs, such as:

• Additional costs

• Unpaid outsourcing fees

Financial accounting handles these through provisions, but they do not automatically flow into project-level numbers—creating another mismatch.

To fix this:

• Maintain an official project-level provision ledger (Excel is fine)

• Apply provisions during the period-end rate replacement

• Align project-level provisions with financial accounting

This synchronizes project profit and financial profit.

Conclusion

During the period: Standard rate × actual labor hours

At period-end: Actual rate × actual labor hours + project-level provisions

This is the only method to create “One Truth” across the company.

When accounting, operations, and management all see the same numbers, the organization finally moves in the same direction.

And this system can only be designed by someone who understands financial accounting, management accounting, and project accounting together.

This is all for today. See you in the next blog!

If you'd like to understand how your company's numbers flow in reality, I can walk through your actual data and help you structure it.

Standard rates, actual rates, and project-level provisions all require company-specific design. If you’re interested, I can help you build the optimal structure for your situation.

60-minute initial consultation available >> info@metricjapan.com

Tags

#ManufacturingCost #FinancialAccounting #ManagementAccounting #ProjectCost #CostVariance #OneTruth #StandardRate #ActualRate #MidSizedManufacturers