Discounted cash flow (DCF) remains the gold standard of business valuation, but in the manufacturing sector it often breaks down. The main culprit is depreciation.
Why standard DCF fails for manufacturing
Manufacturing companies share three characteristics:
- A high share of fixed assets - machines, production lines, buildings.
- Significant capital expenditures (Capex) for maintenance and modernization.
- Non-linear wear of equipment that differs from linear accounting depreciation.
The classic free cash flow to the firm (FCFF) formula looks like this:
FCFF = Net income + Depreciation - Change in working capital - Capex
The problem is that depreciation here is only the appearance of a cash source. When you add it back but do not subtract the real cost of renewing assets, you create the illusion of additional cash flow. For a manufacturing company this is critical: its equipment dies faster than it depreciates on the books.
Depreciation is an accounting entry, not a source of cash. Add it back into FCFF but fail to subtract the real cost of replacing assets, and you get a cash flow that does not exist in reality.
Error #1: substituting Capex with depreciation
Many appraisers use a shortcut: "Capex is roughly equal to depreciation." In an ordinary company this may pass, but for manufacturing such an assumption is fatal. Real maintenance Capex often exceeds depreciation by 30-50% because of:
- inflation in equipment prices;
- the need for unplanned repairs;
- technological obsolescence of equipment.
The plant buys a machine for $100k with a 10-year service life. Accounting depreciation is $10k per year. After 5 years an equivalent already costs $150k, and the machine needs a $20k CNC replacement. Actual maintenance Capex that year is $20k, while depreciation is $10k. By adding back $10k of depreciation but not setting aside $20k of Capex, you overstate FCFF by $30k that year.
Error #2: ignoring economic depreciation
Accounting depreciation is linear, while economic depreciation often accelerates. In manufacturing, key components wear out faster, productivity falls, and operating costs rise. If you do not model the decline in asset efficiency, your DCF generates overstated cash flows in the later periods of the forecast.
Error #3: an incorrect tax shield
Depreciation reduces taxable income, creating a tax saving (the tax shield). In DCF, however, this saving is often counted twice: first in NOPAT (where tax is calculated net of depreciation) and then again by adding the depreciation itself. The formula must be rigorous.
NOPAT = EBIT × (1 - Tax) - here depreciation has already been subtracted from EBIT, and its effect on taxes is accounted for. Then we add back depreciation but subtract Capex. No additional tax-shield adjustment is required.
Error #4: ignoring the phase of the investment cycle
A manufacturing company lives in cycles: several years of low Capex (the equipment runs), followed by a replacement peak (Capex 2-3 times higher than depreciation). Averaging these costs kills the DCF. The result:
- In low-Capex years you get high cash flow - but it is not representative for a long-term valuation.
- In high-Capex years you see negative FCF and may wrongly conclude that the company is inefficient.
The solution is to model investment cycles explicitly, with a 7-10 year horizon and separate forecasts for each asset group.
When depreciation really does "kill" a DCF
- In capital-intensive industries: metallurgy, heavy machinery, cement, chemical production.
- At old plants with more than 60% wear - accounting depreciation has already been booked, while actual repair costs are enormous.
- Under rapid technological change (robotics, CNC machines) - obsolescence eats up asset value within 3-5 years.
The more capital-intensive and older the asset, the wider the gap between accounting depreciation and the real demand for capital - and the more dangerous it is to trust a "bare" DCF.
An audit of your manufacturing DCF
G-Invest specializes in industrial consulting: we check DCF models for distortions from depreciation, incorrect Capex and cyclical replacements, build adjusted cash flows that separate maintenance and growth Capex, and prepare investment memoranda for M&A and fundraising. One mis-accounted machine can cost you a billion in the deal price.
Frequently asked questions
How does depreciation affect a DCF business valuation?
Depreciation increases cash flow, but it simultaneously requires the replacement of worn-out assets. Without an accurate account of maintenance Capex, DCF overstates the value of the company.
Why is DCF unsuitable for manufacturing companies?
Standard DCF poorly captures cyclical capital expenditures, uneven equipment wear, and the difference between accounting and economic depreciation.
Which valuation method is more accurate than DCF for a machine-building plant?
A combination of DCF with the real options method and an income approach that splits assets into groups. For old plants, the liquidation value method plus the cash flow from redevelopment gives good results.
What hidden errors arise when valuing a business with highly depreciated fixed assets?
- Ignoring obsolescence - the equipment works, but inefficiently.
- No preventive maintenance schedule in the model.
- Using averaged Capex without accounting for spikes.
- Overstating terminal value because of "perpetual" asset reproduction.