Mortgage Guides
Short explainers next to the calculators: term choice, PMI, affordability, extra principal, refinance break-even, and recast vs refinance. Not loan offers or advice.
PMI & loan-to-value
- What Is PMI and How Does It Work
PMI is lender insurance on many conventional loans above 80% LTV. Monthly cost comes from the rate you are quoted. Cancellation rules differ by loan type.
- How Is PMI Calculated?
PMI is typically loan amount × annual rate, divided by 12 for a monthly estimate. The rate comes from your lender, not a fixed table.
- When Can PMI Be Removed?
Many conventional loans allow PMI cancellation near 80% of original value and automatic termination near 78% on the schedule. Rules vary by loan type.
- PMI vs Mortgage Insurance: What Is the Difference?
PMI is conventional mortgage insurance. FHA MIP, VA funding fees, and USDA guarantee fees are separate products with different rules.
- What Is Loan-to-Value Ratio?
LTV compares your loan balance to the home value. Above 80% LTV, many conventional borrowers pay PMI.
Payments & amortization
- How Mortgage Payments Are Calculated
Monthly P&I comes from loan amount, rate, and term using the standard amortizing formula. Taxes, insurance, and PMI are added separately.
- Principal vs Interest: How Your Mortgage Payment Works
Interest is charged on the remaining balance; principal pays down the loan. The split changes every month on a fixed payment.
- What Is an Amortization Schedule?
An amortization schedule shows how each payment splits between principal and interest until the loan is paid off.
- What Does PITI Mean?
PITI is principal, interest, property taxes, and homeowners insurance. Full housing cost often includes PMI and HOA too.
- 15-Year vs 30-Year Mortgage: Key Differences
A 15-year loan costs more each month and usually far less interest over the life of the loan. A 30-year loan lowers the required payment and costs more interest if you keep it.
Affordability & down payment
- How Much House Can I Afford
Affordability tools estimate a housing budget from income, debts, and costs. They are not pre-approvals. Keep payment, reserves, and loan term in the same conversation.
- How Down Payment Size Changes a Mortgage
More down means less borrowed and often no PMI at 20%. Less down preserves cash but raises monthly cost and may require insurance.
Extra payments
- How Extra Mortgage Payments Reduce Interest
Extra principal can cut interest and shorten payoff if the servicer applies it correctly. It is optional cash, not a guaranteed investment return.
- Should You Make Extra Mortgage Payments?
Extra principal saves interest, but only makes sense if you can afford it after reserves and higher-priority debts.
- Lump-Sum Mortgage Principal Payment
A lump-sum principal payment can cut interest and shorten payoff. The required monthly payment usually stays the same unless you recast or refinance.
- Biweekly vs Monthly Mortgage Payments
Biweekly plans make 26 half-payments per year — about one extra monthly payment — which can reduce interest like recurring extra principal.
Refinance
- Mortgage Refinance Break-Even
Break-even asks how long a lower payment takes to recover refinance costs. Check remaining term and total interest, not the payment change alone.
- Mortgage Recast vs Refinance
A recast recalculates payment on your existing loan after a principal reduction. A refinance replaces the loan. Eligibility depends on the servicer and lender.