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Deal Analysis·4 min read·invest

現金流分析(Cash Flow Analysis)

Also known as現金流預測租金現金流分析
Published Dec 8, 2024Updated Mar 22, 2026

What Is 現金流分析(Cash Flow Analysis)?

現金流 = NOI還貸支出NOI = 毛收入 − 空置損失營運費用還貸支出 = 本金 + 利息。以曼菲斯一棟雙拼為例:毛租金$28,800,6%空置率,$10,400營運費用,得到NOI $16,672。還貸支出$14,400。現金流 = $2,272/年($189/月)。現金流分析就是從頭搭建這套計算:租金明細、空置率營運費用、貸款條件。它是買入持有策略核算的基石——你必須知道最終有多少錢能到你手上。

現金流分析(Cash Flow Analysis)是預測一處出租物業每月或每年能裝進你口袋多少錢的過程——淨營業收入(NOI)減去還貸支出

At a Glance

  • 定義: 預測現金流 = NOI還貸支出
  • 核心意義: 現金流是真正付給你的錢——最終入帳的數字
  • 關鍵輸入: 租金、空置率營運費用、貸款條件
  • 目標:保守核算下仍維持正現金流
Formula

Cash Flow = NOI - Debt Service

How It Works

第一步:搭建NOI 從毛潛在租金入手——實際租金明細或市場租金。減去空置損失——穩定市場通常按5–8%計。加上其他收入(洗衣、寵物費等),得到有效毛收入(EGI)。再減去營運費用:房屋稅、保險、維修、物業管理費、水電瓦斯、維修準備金。結果就是NOI

第二步:計算還貸支出 貸款金額 × 利率 × 期限。用貸款計算器或攤還公式算出月付額。年還貸支出 = 月付額 × 12。對於只付息貸款,還貸支出 = 僅利息部分。

第三步:得出現金流。 現金流 = NOI還貸支出。正數 = 錢進口袋。負數 = 你在倒貼物業。月現金流 = 年度數據 ÷ 12。

第四步:壓力測試。保守核算跑一遍:空置率上調2%,費用上調5%。現金流還是正的嗎?如果不是,這筆交易的安全邊際太薄了。

Real-World Example

哥倫布(Columbus, Ohio)四拼公寓。 陳先生(Chen)看中一棟售價$380,000的四拼。頭期款$95,000,利率7%,25年攤還。年還貸支出$24,200。毛租金$48,000(4個單元 × $1,000/月)。空置率6%:-$2,880。有效毛收入$45,120。營運費用:房屋稅$5,700、保險$2,200、維修$3,800、管理費$4,800、維修準備金$2,400,合計$18,900。NOI = $45,120 − $18,900 = $26,220。現金流 = $26,220 − $24,200 = $2,020/年($168/月)。現金報酬率 = $2,020 ÷($95,000 + $7,600過戶費)= 2%。偏薄但為正。保守壓力測試:8%空置率、42%費用率。NOI降至$22,800。現金流 = −$1,400。壓力測試不通過——放棄或議價。

Pros & Cons

Advantages
  • 聚焦核心——現金流是你真正能花的錢
  • NOI還貸支出銜接——業界標準格式
  • 便於比較——可透過現金報酬率在不同交易間橫向對比
  • 揭露敏感性——調整空置率或利率即可看到影響
Drawbacks
  • 未包含增值和貸款本金償還帶來的隱性收益
  • 依賴預測收支表——NOI估計有誤會傳導到現金流
  • 空置率和費用波動可能導致實際現金流與預測偏差較大
  • 單期分析——無法捕捉多年期的趨勢變化

Watch Out

  • 預測收支表陷阱: 賣方提供的NOI往往偏高。務必用你自己的空置率營運費用重新核算。NOI偏差$5,000 = 現金流偏差$5,000。
  • 利率假設風險: 如果你按6.5%建模,但實際鎖定7.5%,還貸支出上升,現金流下降。用當前利率或加0.5%緩衝。
  • 現金流過薄: 每月$100的現金流經不住8%空置率的衝擊。建議每個單元至少$200+/月作為安全墊。
  • 忽視大額維修: 現金流不包含屋頂更換等資本支出。老舊物業每個單元每年預留$200–400作為維修準備金。

Ask an Investor

The Takeaway

現金流分析 = NOI還貸支出。從租金明細、空置率營運費用搭建NOI,再減去還貸支出——這就是最終到你手上的錢。用保守核算做壓力測試。如果現金流仍為正、現金報酬率達到你的目標門檻,這筆交易就值得推進。

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