投资回收期 计算器

Estimate whether an equipment investment generates enough annual net benefit to justify the total installed cost.

• Total installed investment (currency)
• Annual gross benefit (currency/year)
• Annual operating cost (currency/year)
• Useful life (years)
• Residual value (currency)
• Discount rate (% per year)

net = gross benefit − operating cost; simple payback = investment ÷ net; NPV = Σ CFt ÷ (1+r)^t with CF0 = −investment; IRR = r where NPV = 0; lifetime ROI = (net × life + residual − investment) ÷ investment.

• Annual net benefit
• Simple payback — Undiscounted
• Discounted payback
• Annual ROI — Accounting ratio, not a discounted return
• Lifetime ROI
• NPV
• IRR — Returned only when the cash-flow series changes sign

• Simple payback ignores the time value of money and must not be read as a return.
• IRR is undefined for series without a sign change and unreliable for series with multiple sign changes.
• Does not model financing cost, tax, inflation or currency risk.
• Single-currency model. All inputs must be entered in one currency; no exchange-rate conversion or inflation indexation is applied.
• Pre-tax model. Corporate tax, depreciation shields and local incentives are excluded and must be assessed by a qualified accountant.

This is a preliminary planning estimate. Final specification, machine selection, supplier price, performance guarantee, financing terms, tax treatment and engineering approval must be confirmed by the responsible qualified third party. Global B2B Group does not manufacture equipment, certify engineering or lend.

Carry the result into a structured RFQ: Project budget, Annual benefit, Operating cost, Required payback, Project life. You review and approve every transferred value — nothing is submitted automatically.

Engine version 1.2.0 · reviewed 2026-08-21 · full methodology