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Compare the annual cost of keeping the current machine and of replacing it with a new one, and the cost per working hour of each option.
Pre-sizing and estimating tool: the results do not replace a design, calculation, or report signed by a qualified professional, nor verification against the applicable standards.
Cost per hour worked of each option; the highlighted bar is the cheapest.
Annual difference between keeping and buying at different rates; above zero, buying is cheaper.
Drag the controls to simulate data different from what you entered (from 30% less to 30% more) and watch the result change instantly.
Cost per hour of keeping and of buying for 400 to 1,200 working hours per year, with the values entered.
The calculation done in steps, with the values you entered.
The calculation memo gathers this page's inputs, results, equations, assumptions, and references, with fields for project, responsible person, and review. The full report also includes the charts and interpretations, in color. In the print window, choose Save as PDF.
Enter the current machine's market value, its annual maintenance, and the value it will have at the end of the horizon. Then enter the new machine's price, its residual value, annual maintenance, interest rate, horizon, and hours worked per year.
Current one is worth R$ 250,000, will be worth R$ 80,000 in 5 years and costs R$ 9,000/year to maintain. New one costs R$ 400,000, will be worth R$ 120,000 in 5 years and costs R$ 6,000/year. Interest of 12% and 800 hours per year.
Keep = (250,000 − 80,000) ÷ 5 + 12% × 165,000 + 9,000 = R$ 62,800/year, or R$ 78.50 per hour. Buying = (150,000 − 120,000) ÷ 5 + 12% × 135,000 + 6,000 = R$ 28,200/year, or R$ 35.25 per hour.
Because machines work different numbers of hours per year. Comparing annual cost without dividing by hours can favor a machine that works less.
Because the money used for the purchase could earn a return elsewhere. This opportunity cost is a real cost, even without a loan.
Check the market value of similar machines, with similar age and hours. If in doubt, use a conservative value and test other scenarios.
No. It compares costs. The decision also depends on credit, the need for operational capacity, and the risk of downtime.
Important notice: the Agrocalcs tools make estimates and preliminary sizing based on the data entered and on published engineering methods. They do not replace a design, a calculation report or a report signed by a qualified professional (CREA/ART), nor verification against the applicable technical standards and legislation, such as the Regulatory Standards of the Ministry of Labor. Material and fuel properties vary: check with the manufacturer or with analyses of your process before deciding. By using the site, you agree to the Terms of Use.
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