Car Lease Calculator
From MSRP, selling price, fees, residual and money factor, compute the monthly lease payment (depreciation + finance charge).
輸入資料
計算結果
重點速覽：Car lease monthly payment = depreciation + finance charge (+ tax). net capitalised cost = (selling price + dealer fee + registration) - (trade-in + down payment + other reductions). residual = MSRP x residual %. monthly depreciation = (net cap cost - residual) / term. monthly finance = (net cap cost + residual) x money factor (≈ rate / 2400). monthly payment = (depreciation + finance) x (1 + tax). HK has no general sales tax (tax = 0). Leasing pays only for use-period depreciation + interest; payment is usually lower than a loan, but the car is returned at end — no ownership. WARNING: Convert money factor to APR (x 2400); watch mileage/wear charges; HK adds first registration tax and licence. Compare lease vs buy on total cost.
計算公式
淨資本化成本 = (議定售價 + 車行費 + 登記費) − (舊車折抵 + 首期 + 其他減免)。
殘值 = MSRP × 殘值百分比；每月折舊費 = (淨資本化成本 − 殘值) ÷ 租期。
每月利息 = (淨資本化成本 + 殘值) × 財務因子；每月供款 = (折舊費 + 利息) × (1 + 稅率)。
$$\text{淨資本化成本} = (\text{售價}+\text{車行費}+\text{登記費}) - (\text{折抵}+\text{首期}+\text{減免})$$$$\text{每月折舊} = \dfrac{\text{淨資本化成本} - \text{殘值}}{\text{租期}},\quad \text{每月利息} = (\text{淨資本化成本}+\text{殘值}) \times MF$$$$\text{每月供款} = (\text{折舊}+\text{利息}) \times (1 + \text{稅率})$$使用說明
- Enter MSRP, selling price, dealer fee and registration.
- Enter trade-in, down payment and other reductions.
- Set residual %, money factor and term to see the monthly payment.
以 MSRP 300,000、淨資本化成本 263,000、財務因子 0.0025 (APR 約 6%)、租期 36 個月為例，不同殘值百分比下的每月折舊、利息與月供 (HK$)。
| 殘值百分比 | 殘值 | 每月折舊 | 每月月供 |
|---|---|---|---|
| 50% | 150,000 | 3,139 | 4,171 |
| 55% | 165,000 | 2,722 | 3,792 |
| 60% | 180,000 | 2,306 | 3,413 |
| 65% | 195,000 | 1,889 | 3,034 |
理財情境案例
案例一：財務因子高低，直接反映利息成本
同一部 MSRP 300,000 的車、淨資本化成本 263,000、殘值 60% (180,000)、租期 36 個月，甲車行報 money factor 0.0025，乙車行報 0.0035，差多少？
0.0025 換算 APR = 0.0025 × 2400 = 6%，每月利息約 1,108，月供約 3,413；0.0035 換算 APR = 8.4%，每月利息約 1,551，月供約 3,856。
money factor 看似只差 0.0010，換算成年利率卻差 2.4 個百分點，每月多付約 443。租車時務必把 money factor × 2400 換算成 APR 來比較，別被小數點迷惑。
案例二：加首期能降月供，但那筆錢「租完不還」
同一租約 (淨資本化成本前為售價 285,000 + 費用 8,000)，首期由 30,000 加到 60,000，月供會怎樣？
首期 30,000：淨資本化成本 263,000，月供約 3,413；首期 60,000：淨資本化成本 233,000，月供約 2,505。
多付 30,000 首期，月供由 3,413 降到 2,505、每月省約 908。但租賃的首期 (capitalized cost reduction) 是「預付的使用成本」，租約結束不會退回，若中途出險車輛全損，這筆首期往往血本無歸。因此租車的首期一般不宜過高。
常見問題
What is the money factor and how to convert to APR?
The money factor is how leases express the interest rate. Multiply it by 2400 to get the approximate annual rate (APR): 0.0025 x 2400 = 6%. The lower the money factor, the lower the finance cost. Always convert it to APR before comparing with a loan.
Why does a higher residual lower the payment?
Because you only pay for the depreciation (net cap cost - residual) over the lease. A higher residual means less depreciation to cover, so the monthly depreciation — and thus the payment — falls. Residual % is set by the lessor and reflects expected resale value.
Lease vs buy — which is cheaper?
Leasing usually has a lower monthly payment and you drive a newer car with less upfront cash, but you own nothing at the end and face mileage/wear charges. Buying builds equity and you keep the car, but the monthly payment is higher and you bear depreciation and resale risk. Compare on total cost over your planned horizon, including the HK first registration tax and your intended usage. This tool shows the lease side; pair with the car loan and car depreciation calculators.
What hidden costs should I watch in a HK lease?
Beyond the monthly payment: excess-mileage charges, wear-and-tear/return conditions, and admin fees. The car still attracts first registration tax and annual licence. Read the lease's mileage cap and return standards before signing; the low monthly figure can hide these.
Is the money factor the same as APR?
No. The money factor is a small decimal (e.g. 0.0025) that hides the true rate; APR = money factor x 2400. A seemingly tiny money factor can mean a meaningful APR. Always do the conversion so you compare leases and loans on the same footing.
相關工具
參考資料
內容審核：香港計算器財經團隊。計算邏輯與公式參考香港金融管理局（HKMA）及投資者及理財教育委員會（IFEC）之個人理財計算指引，結果僅供參考，實際以相關機構公佈為準。