+$500/mo in hidden costs
Real costs of a mortgage: beyond the payment
Your monthly principal-and-interest payment is only part of the true cost of homeownership. Property taxes typically add $250-$500/month on a $300,000 home, insurance another $83-$250/month, mortgage insurance (if down payment is under 20%) varies by lender, and maintenance averages roughly 1% of home value per year. Budget for the full cost, not just the loan payment.
Key takeaways
04 · ideas- Property tax: $250–$500/mo on a $300k home
- Homeowner's insurance: $83–$250/mo
- Mortgage insurance if down < 20%: varies
- Maintenance: ~1% of home value/year
Illustrative chart
$200k · 7.5% · 30yr
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Basic level
The essentials · 1 min
Your P&I payment (principal + interest) is just the start. A home also requires:
- Property tax — paid monthly via escrow, ~1–2%/year of home value
- Homeowner's insurance — required by lender, ~$100–250/month
- PMI — required if down payment < 20%, ~$50–200/month
- Maintenance — budget 1% of home value per year
On a $300,000 home, these can add $500–900/month on top of your P&I payment.
Intermediate level
How it applies · 2 min
Full cost breakdown — $300,000 home, 20% down ($60,000), 7.5% rate
| Cost item | Monthly | Annual | Notes |
|---|---|---|---|
| Principal + Interest | $1,678 | $20,136 | On $240k loan, 30yr |
| Property Tax (1.2%) | $300 | $3,600 | Varies by location |
| Homeowner's Insurance | $150 | $1,800 | ~0.5–1% of value |
| PMI (if <20% down) | $0 | $0 | Zero with 20% down |
| HOA | $200 | $2,400 | If applicable |
| Maintenance | $250 | $3,000 | 1% of value/yr |
| **Total PITIA+M** | **$2,578** | **$30,936** |
- Loan: $270,000 → P&I: $1,888/month
- PMI: ~$135/month (0.6% of loan/year)
- Total: $2,923/month (+$345 vs 20% down)
PMI cancels automatically when your LTV reaches 80% — typically after several years of payments plus appreciation.
Advanced level
The math, step by step · 1 min
True cost of ownership (TCO) model
$$\text{TCO} = M_{\text{annual}} + \text{Tax} + \text{Insurance} + \text{PMI} + \text{HOA} + \text{Maint.} - \text{Appreciation} - \text{Equity} + \text{OpportunityCost}$$
Where:- Appreciation $= V_0 \times g$ (e.g., $300{,}000 \times 3\% = \$9{,}000$)
- Equity built in year $y$ $= 12M - \text{AnnualInterest}_y$
- Opportunity cost $= D \times r_{\text{invest}}$ (down payment $D$ invested at rate $r$)
Year 1 calculation — $300k home, 20% down:
$$\text{TCO}_{Y1} = 20{,}136 + 3{,}600 + 1{,}800 + 0 + 2{,}400 + 3{,}000 - 9{,}000 - 2{,}080 + 4{,}800 = \$24{,}656/\text{yr}$$
$$\text{Effective monthly cost} = \frac{\$24{,}656}{12} = \$2{,}055/\text{month}$$
The break-even rent is the rental price at which buying and renting are financially equivalent — approximately $2,055/month for this scenario.