The Quick Read: A jumbo refinance is approved on four things: your credit and debt load, how much you borrow against the home’s value, the cash you hold after closing, and the appraisal. No federal rule sets the leverage, reserve or credit minimums. Each lender sets its own, so the same file can get different answers. Across the wholesale lanes Lendmire works with, the headline lane starts at a 660 decision score, reaches 90% leverage, and runs to $5,000,000, all subject to lender guidelines and full file review.
What Makes a Refinance “Jumbo”?
A refinance is jumbo when the new loan is above the conforming limit for your county. The limit is the most Fannie Mae and Freddie Mac can buy. FHFA sets it each year and raises it in high-cost areas. Alaska, Hawaii and a few territories have their own statutory limits. Check your county on the FHFA data page, because the line differs by county and by number of units.
Refinance savings and break-even estimate
The starting figures are an example value with a balance in proportion and a placeholder for costs. Replace them with yours, and enter the current rate from your statement.
Editable benchmark: 7.40% as of October 15, 2026 · Freddie Mac 30-year average via FRED®. A conventional market reference, not a refinance quote.
Illustrative starting assumptions: a $350,000 home value, a $245,000 current balance, a current rate you enter and a remaining term seeded at twenty-five years, closing costs seeded at $5,000 as an editable placeholder (not a fee quote) and rolled into the new loan, a thirty-year term at the current Freddie Mac benchmark, and property taxes and insurance estimated at typical national rates. Every field is editable.
Illustrative estimate only — not a Loan Estimate, approval, quote, or commitment to lend. The new rate field carries the weekly Freddie Mac thirty-year conventional benchmark, a market reference and not a refinance quote; a refinance is priced by the lender at lock, and the current rate, the remaining term and the closing costs are figures you enter. The current payment is estimated from the balance, the current rate and the remaining term; the break-even divides the closing costs by the monthly saving and ignores the interest effect of a longer term. On the VA IRRRL the funding fee is added to the loan unless the veteran is exempt. Taxes and insurance are editable estimates. Licensed in sixteen states for consumer mortgages; Lendmire is a broker, never the lender.
Size is measured on the new loan, not the home's price. The new loan is your payoff, plus any cash you take out, plus any costs you finance. A homeowner whose payoff sits near the line can cross it just by rolling in closing costs. A loan right at the line can also be conforming at one lender and jumbo at another, since lenders handle limit changes differently. Don't plan around a future limit until FHFA announces it.
Because the loan can't be sold to the agencies, the lender or investor writes its own rules. That's why jumbo is stricter and less uniform than conforming. Lendmire's jumbo loan programs are arranged through wholesale lenders, and each lane has its own limits.
Key Terms Defined
Conforming limit: The maximum loan size Fannie Mae and Freddie Mac can buy, set by FHFA by county and unit count. Exact terms depend on the lender's guidelines, property type, leverage, and a full review of the borrower's file.
LTV (loan-to-value): The loan amount divided by the appraised value of the home.
CLTV (combined loan-to-value): All loans against the home, added together, divided by the appraised value.
Reserves: Liquid assets left after closing, counted in months of your full housing payment.
DTI (debt-to-income): Your monthly debts, including the new payment, divided by your monthly gross income.
Ability-to-repay: The federal duty for lenders to make a good-faith finding that you can repay the loan.
How Is a Jumbo Refinance Underwritten, Step by Step?
The deal works through the same stages at nearly every lender. Underwriting starts with size and ends with a decision on the whole picture.
1. Loan size versus the county limit. The lender adds the payoff, cash out and financed costs, then compares the total with your county's limit. Above it, the loan is jumbo.
2. Application and appraisal notice. For a first-lien loan on a home, the lender must tell you in writing, shortly after the application, that you can get a copy of any appraisal. The Federal Register rule covers the timing and notes that the copy is free, though the appraisal itself is a borrower cost.
3. Documentation. The lender verifies income, employment, assets, debts and credit. Federal ability-to-repay rules require eight underwriting factors and verification from reliable third-party records. Exact document lists vary by lender.
4. Appraisal and value. The appraised value sets your LTV. Everything else in the file leans on that number.
5. Reserves check. The lender confirms the liquid cash left after closing.
6. Decision. Leverage, ratios, credit, reserves, occupancy and purpose (rate-and-term or cash-out) are weighed together.
Leverage: How Much Can You Borrow Against the Home?
Leverage is the first gate, and purpose moves it. Across the wholesale jumbo lanes, the headline lane reaches 90% leverage, and several lanes reach 89.99% CLTV. The rest stop at 80%. Cash-out refinances sit at lower leverage than purchases, and the largest lanes put a cash cap on how much you can take out. Every figure here varies by lender and program — guidelines, property type, leverage, and credit profile all apply.
Here is how the pieces compare, using only the figures that apply to the lanes:
| Factor | What the lanes do |
|---|---|
| Headline lane leverage | Up to 90% |
| Other lanes | Several to 89.99% CLTV; rest stop at 80% |
| Cash-out | Lower leverage than purchase; cash cap on two lanes |
| Occupancy | Primary, second home, investment at lane-specific leverage |
| Loan size | Up to $5,000,000 on the largest lanes |
Run the LTV the way a lender does. Picture a home with a new loan at 75% of its appraised value. A 5% drop in the appraisal lifts the same loan to roughly 79% LTV, and that can push a file out of a leverage tier. A cash-out request sharpens this, because the extra cash raises the loan without changing the value. Final terms depend on lender guidelines, property type, leverage, and the borrower's complete credit picture.
The practical rule: before you apply, price your payoff plus any cash plus financed costs against a cautious value, not the high one. If a lender's lane stops at 80%, a 3% appraisal miss matters.
For more on caps and how they interact with cash out, see Lendmire's piece Jumbo Cash-Out Refinance Loan Caps, Reserves and Appraisals.
Reserves: What Counts and How They're Measured
Reserves are measured in months of your full housing payment. That means principal, interest, taxes, insurance and any association dues. Across the lanes, the required months rise with the loan amount. No federal rule sets a number, so a bigger balance means a bigger cushion.
A few mechanics trip files up:
- Reserves can't do double duty. Money counted as reserves can't also fund closing costs or a payoff shortfall. Count the cash you need to close first, then see what's left.
- Account types are treated differently. Lenders generally value checking and savings at face value. Retirement and brokerage assets are often discounted, and business accounts can need extra documentation. Ask how your lender treats each.
- Statements need to be clean. Large unexplained deposits get questioned. Keep the paper trail simple and move money well before you apply.
- Cash-out proceeds. Some lenders let them count toward reserves and some don't. Confirm this before relying on it.
A borrower with a strong score and a high-leverage request often finds reserves, not credit, set the pace. Here's the catch: the same assets that look strong on a net worth statement can look thin once discounts are applied.
Appraisals: The Number Everything Rests On
The appraisal sets your LTV, so a low value can change your loan size, your lane, or your answer. On jumbo loans, the lenders and investors set their own appraisal age and review rules. The agencies' shortcuts, such as appraisal waivers, are a conforming tool, and jumbo lenders often don't offer them. Plan on a full appraisal.
Above a lane's threshold amount, two appraisals are required. When two values come in, lenders typically work from the lower of the two. Ask your lender how it handles a gap before you order, because that rule varies. Lendmire's article How to Handle Two Appraisals on a Second Home Jumbo Cash-Out Refinance walks through the mechanics.
If the appraisal comes in low, you have four moves:
| Option | What it does |
|---|---|
| Pay down the loan | Brings LTV back under the tier |
| Switch to rate-and-term | Drops the cash-out request and its lower leverage |
| Request reconsideration | Submit recent nearby sales and condition notes |
| Wait | Let value or your balance change, then reapply |
Reconsideration works best with recent, close-by sales and a clear reason the first value missed. Vague complaints rarely move a number. Prepare the home before the visit: list upgrades, clean up, and have your own comps ready.
You also have rights here. The lender must give you a free copy of every appraisal promptly, and the duty still applies if the loan is denied or withdrawn.
Credit, Ratios and Income
The headline lane starts at a 660 decision score. Higher scores widen your options, and some lenders set higher floors than others. On the fixed lanes the ratio ceiling is 50%. It is 45% on the adjustable lanes and 43% on the interest-only lanes.
Your debt ratio counts the new payment, plus car loans, student loans, credit cards, support obligations and any other mortgages. Self-employed and commission earners should expect lenders to average income over a period and look hard at declining years. Show a steady or rising trend where you can.
The home's value can't be the asset that proves you can repay. Federal ability-to-repay rules exclude it. Income and liquid assets carry that job.
How the Levers Trade Off
The gates aren't fully independent. A lower LTV, deeper reserves or a stronger score can offset a thinner spot elsewhere, within each lane's limits. A file at the ratio ceiling usually needs strength somewhere else. A 90% leverage request leaves little room for a weak appraisal.
Think of it this way: three levers, one appraisal. Credit and ratios show capacity. Leverage and reserves show cushion. The appraisal tells you how much cushion you really have.
Structure matters too. Fixed, adjustable and interest-only lanes each carry their own ratio ceilings. Non-warrantable condos fit on two lanes. Second homes and investment occupancy carry their own leverage. Since this article covers a home you live in, check occupancy early, because it changes the leverage answer.
Common Mistakes and a 90-Day Fix List
The same errors show up again and again:
- Estimating value from an online tool instead of recent sales.
- Forgetting that financed costs raise the loan and the LTV.
- Counting one pool of cash as both reserves and closing funds.
- Opening new credit or making a big purchase during underwriting.
- Assuming a quote from one lender means another will match.
Before you apply, work the weak spot:
- Credit: Pay down card balances and fix report errors.
- Reserves: Season your funds in one account and keep statements tidy.
- LTV: Consider a smaller cash-out, or a paydown, to land under a tier.
- Income: Gather returns and year-to-date records for every earner.
Is a refinance worth it? Run the break-even: closing costs against the monthly savings. Jumbo balances carry larger costs, and an appraisal miss can erase the gain. If the numbers only work with a high value, wait. Tax treatment can depend on your situation; borrowers should speak with a qualified tax professional before relying on any deduction or credit.
If you want the break-even run on your own numbers, Lendmire can help you compare programs on the same home.
Frequently Asked Questions
Can I refinance a jumbo loan into a conforming loan?
Yes, if your balance falls under your county's limit. A paydown or a higher limit can do it. Check the FHFA county table, since the line differs by county and unit count.
Does a jumbo refinance always need an appraisal?
Plan on one. Appraisal waivers are a conforming tool, and many jumbo lenders don't offer them.
Do I need the same reserves for every jumbo lender?
No. No federal rule sets reserves. Lenders measure them in months of your full payment, and the required months rise with the loan amount.
What credit score do I need?
The headline lane Lendmire arranges starts at a 660 decision score. Some lenders set higher floors, and your score also affects which lane fits. Everything is subject to lender guidelines and full file review.
Can I get a copy of my appraisal?
Yes. The lender must provide a copy of the appraisal promptly, even if the loan is denied, and timing can vary by file and lender. The appraisal itself is a borrower cost.
For your own numbers, request a scenario review with Lendmire.
About Lendmire
Lendmire is a mortgage brokerage (NMLS# 2371349) licensed for consumer mortgage lending in 16 states, arranging FHA, VA, conventional and jumbo purchase and refinance loans through a wholesale lending network. Eligibility is determined by the lender on each file. Scotsman Guide named Lendmire a Top Mortgage Workplace in both 2025 and 2026.
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References
1. FHFA – 2026 conforming loan limit announcement
2. Federal Register – ECOA appraisal rule
3. CFPB – ability-to-repay summary
This article is part of Lendmire’s jumbo loan program — full qualification details, guidelines, and scenarios live on the program page.
Related reading: How to Refinance a Jumbo Loan to Remove an Ex-Spouse and Qualify Alone · How to Qualify for a Jumbo Loan for Retirement Account Withdrawals as Income · How Much Jumbo Loan a High W-2 Income Supports After Reserves
Brandon Miller
Founder & CEO, Mortgage Loan Originator, Lendmire LLC
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Important disclosures. Lendmire (NMLS# 2371349) is a licensed mortgage brokerage. Lendmire is not a direct lender, depository institution, or financial advisor. All loan inquiries are subject to lender underwriting; this article does not constitute a commitment to lend. Rates, terms, and program guidelines are subject to change without notice and vary by borrower profile, property type, and state. Information in this article is general in nature and is not financial, legal, or tax advice. Equal Housing Opportunity. NMLS Consumer Access: nmlsconsumeraccess.org.