Simple refund period. investment / annual net savings, simple annual return annual savings / investment ile bulunur. Örneğin 250.000 TL yatırım ve 90.000 TL/yıl tasarruf için geri ödeme ≈ 2,8 yıl ve basit getiri ≈ %36.
Payback = Investment / Annual Savings · Return = Annual Savings / Investment
Example calculation: 250.000 TL yatırım, 90.000 TL/yıl tasarruf → geri ödeme ≈ 2,8 yıl; basit yıllık getiri ≈ %36; 10 yıl ömürde net ≈ 650.000 TL.
Simple Return on Investment (Payback / ROI)
Calculate the payback period and simple return on an energy efficiency investment.
Refund period
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Simple annual return
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Lifetime net income
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Notes: Payback = investment / annual savings · Simple return = savings / investment. It is a simple method (excluding the time value of money); Inflation, tariff increases, maintenance, and discounts (NPV/IRR) are not included. Annual savings should be realistic and verifiable.
How is it calculated?
- Enter the investment amount (TL).
- Enter your annual net savings (in TL).
- (Optional) Enter the equipment lifespan (in years) and click Calculate.
Frequently Asked Questions
How is the repayment period calculated?
The investment amount is divided by the annual net savings; the result gives the number of years it will take for the investment to pay for itself.
Is a simple refund sufficient?
It provides a quick indicator but does not include the time value of money (inflation, discount); NPV/IRR should also be considered for large investments.
What is a good payback period?
It varies depending on the application; in energy efficiency projects, a period of 1–4 years is generally considered attractive.
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