To determine whether the bicycle manufacturer should make its own chains or continue buying them from the supplier, we need to calculate the Net Present Value (NPV) of producing the chains in-house.
The important idea is that making the chains saves money every year, but the company must spend money upfront on machinery and working capital. We need to determine whether the savings are worth more than the initial investment.
Step 1: Calculate the annual cost savings.
The company currently purchases 300,000 chains per year at $2.00 each.
Annual purchasing cost:
300,000 × $2.00 = $600,000
If the company makes the chains itself, each chain will cost only $1.50.
Annual production cost:
300,000 × $1.50 = $450,000
Therefore, the annual savings are:
$600,000 - $450,000 = $150,000
Annual savings = $150,000
This means the company would save $150,000 each year by manufacturing its own chains.
Step 2: Calculate annual depreciation.
The machinery costs $250,000 and will be depreciated to zero over 10 years using straight-line depreciation.
Annual depreciation = Machinery Cost / Useful Life
= $250,000 / 10
Annual depreciation = $25,000
Depreciation is not an actual cash payment each year. However, it reduces taxable income, which saves the company money on taxes.
Step 3: Calculate the annual after-tax operating cash flow.
First, subtract depreciation from the annual savings to find the additional taxable income:
$150,000 - $25,000 = $125,000
Next, calculate the taxes at 35%:
$125,000 × 0.35 = $43,750
Now subtract taxes from the annual savings:
$150,000 - $43,750 = $106,250
Annual after-tax operating cash flow = $106,250
We can also check this using the standard operating cash flow formula:
Operating Cash Flow = (Savings - Depreciation) × (1 - Tax Rate) + Depreciation
= ($150,000 - $25,000) × 0.65 + $25,000
= $81,250 + $25,000
= $106,250
The company generates an additional $106,250 in cash each year for 10 years.
Step 4: Calculate the initial investment.
The company needs to purchase machinery costing $250,000 and invest $50,000 in working capital.
Initial Investment = Machinery + Working Capital
= $250,000 + $50,000
Initial Investment = $300,000
The plant manager is incorrect to suggest ignoring working capital simply because it will eventually be recovered.
The company must spend the $50,000 today but will not receive it back until year 10. Because of the time value of money, receiving $50,000 in 10 years is worth less than having $50,000 today.
Therefore, we must include both the initial working capital investment and its eventual recovery.
Step 5: Calculate the after-tax salvage value.
At the end of 10 years, the machinery can be sold for $20,000.
Since the machinery will be fully depreciated, its book value will be zero.
This means the entire $20,000 salvage value is taxable.
Tax on salvage value:
$20,000 × 0.35 = $7,000
After-tax salvage value:
$20,000 - $7,000 = $13,000
After-tax salvage value = $13,000
Step 6: Calculate the total cash flow in year 10.
At the end of year 10, the company receives:
- Annual operating cash flow = $106,250
- After-tax salvage value = $13,000
- Recovery of working capital = $50,000
Total year 10 cash flow:
$106,250 + $13,000 + $50,000 = $169,250
However, when calculating NPV, we will value the $106,250 annual operating cash flows as a 10-year annuity and add the $63,000 of additional year 10 proceeds separately. This prevents double-counting.
Step 7: Calculate the Net Present Value (NPV).
The NPV formula is:
NPV = Present Value of Annual Cash Flows + Present Value of Terminal Cash Flows - Initial Investment
The annual cash flow is $106,250 for 10 years, and the discount rate is 15%.
Present value of annual cash flows:
PV = $106,250 × [1 - (1.15)^(-10)] / 0.15
The annuity factor is approximately 5.01877.
PV = $106,250 × 5.01877
PV ≈ $533,244.50
Next, calculate the present value of the additional cash received in year 10.
Terminal cash flow = $13,000 + $50,000 = $63,000
PV = $63,000 / (1.15)^10
PV ≈ $15,573.59
Finally, subtract the initial investment:
NPV ≈ $533,244.50 + $15,573.59 - $300,000
NPV ≈ $248,818.09
Final Answer: The NPV is approximately positive $248,818.
Should the company manufacture the chains in-house?
Yes. Since the NPV is positive, producing the chains in-house is financially preferable to purchasing them from the outside supplier, assuming the estimates are accurate.
The company must invest $300,000 initially, but it will save enough money over the next 10 years to recover that investment, cover its 15% required return, and create approximately $248,818 in additional value.
The key lesson is that we must account for all relevant cash flows, including taxes, depreciation tax savings, working capital, and the after-tax salvage value of the machinery.