Frequently Asked Questions

Everything you need to know about mortgages and our calculator

Using the Calculator

We use the standard amortization formula: M = P[r(1+r)^n]/[(1+r)^n-1], where P is loan amount, r is monthly rate, and n is total payments. Don't worry about the math—just enter your numbers and we'll calculate it instantly. Add property tax, insurance, HOA, and PMI in Advanced Options for your total housing cost.

Very accurate for estimates. Your actual payment may differ by a few dollars due to lender rounding and escrow calculations. Always confirm final numbers with your lender.

It shows how each payment splits between principal and interest. Key insight: early payments are ~70% interest, but by year 20 it flips to ~70% principal. This is why extra payments early have the biggest impact.

Understanding Mortgages

Private Mortgage Insurance. Required if down payment < 20%. Costs 0.5-1% of loan annually (~$200-400/mo on a $400k loan). Drops off automatically at 78% LTV, or request removal at 80%.

15-year: ~0.5% lower rate, saves $100k+ in interest, but 40% higher monthly payment.
30-year: Lower payments, more flexibility. You can always pay extra.
Use the calculator to compare with your actual numbers.

A lot. On a $400k loan (30yr): 6% vs 7% = $240/mo difference = $86,000 over the life of the loan. Even 0.25% saves ~$20k. Shop at least 3 lenders.

2-5% of purchase price, paid at closing. Includes: lender fees (~1%), appraisal ($500), title insurance (~0.5%), prepaid taxes/insurance. On a $400k home, expect $8k-20k. Budget for these separately from your down payment—they're due on closing day.

Minimum: 620 for conventional loans, 580 for FHA (with 3.5% down), 500 for FHA (with 10% down).
Best rates: 740+ gets you the lowest rates. Each 20-point drop can add 0.125-0.25% to your rate. Check your score for free before applying, and avoid opening new credit accounts in the months before.

Fixed-rate: Same payment for the life of the loan. Predictable and safe—best if you're staying 7+ years or rates are low.
Adjustable-rate (ARM): Lower initial rate (often 0.5-1% less), but adjusts after 5-10 years. Risky if rates rise, but smart if you'll move or refinance before the adjustment. Most buyers choose fixed for peace of mind.

Compare APR, not just rate. APR includes fees and gives the true cost. Also compare: origination fees, points (each point = 1% of loan), closing costs, and whether the rate is locked. Get at least 3 quotes—all within 14 days so they count as one credit inquiry. A 0.25% rate difference on a $400k loan saves ~$20k over 30 years.

Financial Decisions

The 28/36 rule: Housing ≤ 28% of gross income, total debt ≤ 36%. Example: $100k income = max ~$2,300/mo housing. But "approved for" ≠ "comfortable with." Leave room for life.

Yes, if: You can hit 20% (avoids PMI), you still have 3-6 months emergency fund, and you're not giving up employer 401k match to do it.
No, if: It drains your savings or delays buying in a rising market.

Math says: If your rate < expected investment returns (~7% historically), invest instead.
Reality: Paying off the mortgage is a guaranteed return and feels great. No wrong answer here—it's about your risk tolerance and sleep quality.

Ready to calculate?

Try our free mortgage calculator and see your monthly payment breakdown.

Try our free mortgage calculator