Purchase & Refinance Mortgage Guide: Conventional Loans Explained

PPurchase & Refinance Mortgage Guide

Buying a home and refinancing an existing mortgage are two of the most common reasons people take out loans. Whether you’re purchasing your first home, upgrading to a larger property, or restructuring your current mortgage for better terms, understanding how conventional loans work is essential. This comprehensive guide explains the key differences between purchase and refinance mortgages, outlines qualification requirements, and highlights why working with Official Mortgage—with no broker fees, no origination fees, and no lender junk fees—can save you money.

Conventional Purchase Loans

Conventional loans are mortgages not backed by the government (unlike FHA or VA loans). They follow guidelines set by Fannie Mae and Freddie Mac. Here’s what you need to know about using a conventional loan to buy a home:

Credit Scores: Most lenders require a minimum FICO score of 620 for conventional loans, though higher scores (740+) earn lower interest rates and better loan-level price adjustments.
Down Payment: First‑time homebuyers can put as little as 3% down through programs like HomeReady or Home Possible. Repeat buyers typically need 5% or more. Putting 20% down eliminates mortgage insurance.
Loan Limits: Conventional loans must conform to the FHFA’s baseline conforming limit or, in high-cost areas, the high-balance limit. See our 2026 Loan Limits Guide for details.
Debt-to-Income Ratio (DTI): Conventional loans usually allow up to 45% DTI (some lenders go to 50% with strong credit and reserves).
Private Mortgage Insurance (PMI): Required when your down payment is under 20%. PMI can be removed once you reach 20% equity.
Property Types: Primary residences, second homes, and 1‑4 unit investment properties are eligible. Investment properties require higher down payments and reserves.

Conventional Refinance Loans

Refinancing replaces your existing mortgage with a new one. There are two main types:

Rate‑and‑Term Refinance – You replace your existing loan with a new term (e.g., 30‑year to 15‑year) or interest rate. No cash is taken out. You may roll closing costs into the new loan or pay them at closing.
Cash‑Out Refinance – You borrow more than your current loan balance and take the difference as cash. This option allows you to tap home equity to consolidate debt, fund home improvements, or cover major expenses. Conventional cash‑out refis typically cap the loan‑to‑value (LTV) at 80% for primary residences and 75% for second homes/investment properties.

When Does Refinancing Make Sense?

Lower Rate: If today’s rates are lower than your existing rate by at least 0.5–1.0%, you can save on monthly payments and total interest.
Shorter Term: Switching from a 30‑year to a 15‑year mortgage reduces interest costs and accelerates payoff. Payments will be higher but total savings often justify the change.
Cash Out: Accessing equity can fund renovations, pay off high-interest debt, or invest in another property. Evaluate closing costs and long-term impact before proceeding.
Remove PMI: If your home has appreciated and you now have 20% equity, refinancing can eliminate PMI.

Official Mortgage: A No‑Fee Experience

Most lenders charge a laundry list of fees—broker fees, origination fees, underwriting fees, processing fees, and administrative junk fees. Official Mortgage does not. We are structured on a lender‑paid compensation model that eliminates broker and origination fees altogether. You benefit from:

No broker fees on your Loan Estimate or Closing Disclosure.
No origination fees (often 0.5–1% of the loan amount at other lenders).
No lender junk fees (no underwriting, processing, or administration add-ons).
Transparent third-party costs only (title, escrow, appraisal, and recording).

This structure leads to a cleaner APR and reduces your closing costs. Whether you are buying or refinancing, avoiding fees can save thousands of dollars.

Mortgage Calculator

Use this simple calculator to estimate your monthly payments based on loan amount, rate, and term. You can adjust the numbers to compare purchase or refinance scenarios:

<div id="conv-calculator">
  <label>Loan Amount: <input type="number" id="convLoan" /></label><br>
  <label>Interest Rate (%): <input type="number" id="convRate" step="0.01" /></label><br>
  <label>Term (years): <input type="number" id="convTerm" /></label><br>
  <button onclick="calcConv()">Calculate</button>
  <p id="convResult"></p>
</div>
<script>
function calcConv() {
  var P = parseFloat(document.getElementById('convLoan').value);
  var r = parseFloat(document.getElementById('convRate').value)/100/12;
  var n = parseFloat(document.getElementById('convTerm').value)*12;
  var payment = (P*r*Math.pow(1+r,n))/(Math.pow(1+r,n)-1);
  document.getElementById('convResult').innerText = 'Estimated Monthly Payment: $' + payment.toFixed(2);
}
</script>

Internal Links

Jumbo Loans Hub – For financing amounts above conforming and high-balance limits.
2026 Conforming Loan Limits Guide – Understand the latest limits and how they impact conventional loans.
DSCR Loans Hub – Investors can explore debt service coverage ratio loans.
Pre‑Rate Check – Start your rate check without a hard credit pull or Social Security number.
About Official Mortgage – Learn about our no‑fee philosophy.

Call to Action

Whether you’re buying a new home or refinancing your current mortgage, make sure you know all your options. Get personalized, scenario-based pricing now with our soft‑pull Pre‑Rate Check. There’s no SSN required to start and no hard credit inquiry.

Start Accurate Rate Check →

Frequently Asked Questions (FAQ)

Do conventional loans require mortgage insurance?
If your down payment is below 20%, PMI is required. Once your equity reaches 20%, you can request PMI removal.

Can I refinance more than once?
Yes, you can refinance multiple times, but consider closing costs and whether your savings justify another refi.

How soon can I refinance after buying a home?
Many lenders allow refinancing as soon as six months after closing. Cash-out refinances often require six months’ seasoning.

Can I use a conventional loan for an investment property?
Yes. You can finance 1‑4 unit investment properties with conventional loans. Down payment and reserve requirements are higher than for primary residences.

What credit score do I need to refinance?
Most conventional refinance programs require a 620+ FICO. Cash-out refinances usually require higher scores (680+).

Are there penalties for paying off my mortgage early?
Most conventional loans do not have prepayment penalties. You can make extra payments or pay off the loan early without penalty. Always confirm with your lender.

Choosing the right mortgage strategy doesn’t have to be overwhelming. Whether you’re purchasing or refinancing, Official Mortgage provides clear guidance, transparent pricing, and no hidden fees. Get started now with your personalized rate check.urchase & Refinance Mortgage Guide