租房与买房计算器
对比租房与购买住房的长期财务成本，包含盈亏平衡分析。
关于此工具
选择租房还是买房是大多数人面临的最重要的财务决策之一，但许多人基于情感而非数据做出决定。租房vs买房计算器通过量化每个选项的真实长期成本来消除猜测，其中包括住房贷款、房产税、保险、维修、首付机会成本和房价升值。通过并排比较这些因素，您将清楚地看到哪个选项与您的财务状况、时间范围和人生目标相符。
要使用计算器，请输入房屋价格、首付、贷款详情、租房和买房的月度支出以及房价升值假设。该工具可立即计算您的盈亏平衡点（累积成本倾向于买房而非租房的年份），以及月度成本比较和详细的财务摘要。您可以调整利率、房价升值和租金增长等变量来模拟不同的市场情景，从而了解变化如何影响您的决策。
该工具对正在考虑从租房转为购房的租户、比较不同市场条件地区的购房者，或因人生变化而重新评估住房策略的任何人都极具价值。无论您在稳定工作中计划几十年的未来，还是在权衡职业流动性与房产权益，计算器对成本、权益积累和机会成本的透明分析都将一个令人困惑的决定转变为一个有根据的、数据驱动的选择。
常见问题
代码实现
def rent_vs_buy(
home_price, down_payment, annual_rate, years,
monthly_rent, rent_increase_rate=0.03,
home_appreciation=0.04, investment_return=0.07,
property_tax_rate=0.012, maintenance_rate=0.01
):
loan = home_price - down_payment
monthly_rate = annual_rate / 100 / 12
n = years * 12
monthly_pi = loan * (monthly_rate * (1 + monthly_rate) ** n) / ((1 + monthly_rate) ** n - 1)
# Buying costs over years
total_mortgage = monthly_pi * n
total_tax = home_price * property_tax_rate * years
total_maintenance = home_price * maintenance_rate * years
home_value = home_price * (1 + home_appreciation) ** years
equity = home_value - loan # simplified (ignores principal paid)
total_buy_cost = total_mortgage + total_tax + total_maintenance - (home_value - home_price)
# Renting costs over years
total_rent = sum(monthly_rent * (1 + rent_increase_rate) ** y * 12 for y in range(years))
# Down payment invested
investment_gain = down_payment * ((1 + investment_return) ** years - 1)
print(f"--- Buying ---")
print(f"Total mortgage paid: ${total_mortgage:,.0f}")
print(f"Home value at year {years}: ${home_value:,.0f}")
print(f"Net cost to buy: ${total_buy_cost:,.0f}")
print(f"\n--- Renting ---")
print(f"Total rent paid: ${total_rent:,.0f}")
print(f"Down payment gain: ${investment_gain:,.0f}")
print(f"Net cost to rent: ${total_rent - investment_gain:,.0f}")
rent_vs_buy(400000, 80000, 7.0, 30, 2000)Comments & Feedback
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