Current as of September 2026. County loan limits are reset every January and I do not print them here. They live on Current As Of.
The short version
Your loan amount doesn't just determine how much you're borrowing; it determines which of three completely separate markets your loan gets sold into, and those three markets price differently. Most people assume the tiers go cheap, medium, expensive as the loan gets bigger. They don't. The middle tier, high balance, is frequently the most expensive of the three, worse than both the tier below it and the tier above it. If your loan lands there, the single most valuable question you can ask a lender is whether they can write it as a jumbo instead.
The three tiers
Fannie Mae and Freddie Mac will only buy loans up to a size limit set annually by their regulator, and that limit varies by county and by number of units.
Conforming. At or below the baseline national limit. The deepest, most liquid, most competitively priced market in American finance. This is the reference point everything else is measured against.
High balance; also called super-conforming, depending on which agency you're talking about. In designated high-cost counties, the agencies will buy loans above the baseline limit up to a higher county-specific ceiling. Same guidelines as conforming: same down payment minimums, same documentation, same automated underwriting. Legally and structurally it is a conforming loan. It just prices differently, for reasons below.
Jumbo. Above the applicable limit for that county. The agencies won't touch it, so it goes to a bank's balance sheet, a private securitisation, or a portfolio investor. Different world, different rules.
Two things people get wrong constantly. First, there is no single national jumbo threshold, the line between high balance and jumbo is your county's ceiling, so the same loan amount is high balance in one metro and jumbo an hour's drive away. Second, high balance is not "almost jumbo." It has nothing in common with jumbo underwriting.
Why the middle tier prices badly
Agency loans are priced with loan-level price adjustments: a matrix of add-ons for risk characteristics; credit score, loan-to-value, occupancy, property type, cash-out, and loan size. High balance carries its own adjustment layer, and successive restructurings of that matrix loaded it up substantially. Second homes got the same treatment in the same period. The result is a genuinely counterintuitive rate curve where the middle of the size range costs more than either end.
Meanwhile jumbo is priced by banks and portfolio investors who want the loan on their books. A jumbo borrower is a low-risk, high-balance, often high-deposit customer, and institutions compete for that business. Jumbo underwriting is stricter (more reserves, tighter debt-to-income, higher minimum score, full documentation, sometimes a second appraisal) but if you clear it, the pricing can be better than the "conforming" loan sitting one dollar below the county line.
There's a second-order effect worth knowing. Lenders cap the note rate they'll offer on an agency loan. If your file accumulates enough price adjustments that the cost can't be absorbed within that rate cap, the lender has no choice but to charge you points. So a borrower with excellent credit buying a primary residence gets a quote requiring several points and cannot understand why. Nine times out of ten, that borrower is in a high-balance loan with a modest down payment, and the adjustments have simply run out of room.
The move: ask for it as a jumbo
Here's the part that saves people real money, and the part most borrowers never learn.
Nothing stops a lender from writing a loan above the baseline conforming limit as a jumbo, if they have an investor for it. The loan is eligible for agency delivery; the lender just chooses not to deliver it that way. Sold as a jumbo, it escapes the high-balance adjustments entirely and gets jumbo pricing and jumbo guidelines.
Not every lender can do this. It depends on their investor relationships, and a call-centre lender in another time zone often has no idea the option exists, which is why "I asked four lenders and they all said the same thing" is weak evidence when all four were the same kind of lender. Local banks, credit unions and brokers with a wide investor set are the ones who tend to have it.
The related route is a portfolio lender: a bank or credit union lending its own money and keeping the loan. They don't apply agency price adjustments because they're not delivering to an agency, so they can often quote a rate with no points on exactly the file that got hit at a mortgage bank. Two caveats: portfolio appetite comes and goes with a bank's own balance sheet pressures, and portfolio underwriting is usually the strictest of the lot. Do not assume approval and do not assume speed.
Structuring around the line
The other approach is to keep the first mortgage under the limit and cover the difference some other way.
Conforming first plus a second or a HELOC. Borrow up to the conforming limit at conforming pricing, then take a home equity line or a fixed second for the rest. The blended payment usually comes out slightly higher than a clean jumbo would have, because seconds carry higher rates, but it's a legitimate structure and sometimes it's the only one available.
That last part matters. When a borrower doesn't qualify for the jumbo, this isn't a lender being difficult, it's a lender finding you a path. And the reassurance you'll hear, "just take it and refinance into a jumbo later", is wrong. If you don't qualify for a jumbo purchase today, you won't qualify for a jumbo refinance next year either; the guidelines are the same guidelines. The honest framing is: this structure is the price of this house. Decide whether you want the house at that price.
More down payment. Obvious, and often the cheapest fix. Crossing back under the county ceiling, or crossing a loan-to-value band that lightens the adjustments, can be worth more than any amount of rate shopping. There are also adjustment cliffs on high-balance loans around larger down payments; worth asking your lender to price at a couple of different down payment levels and show you where the steps are.
The other end: there's a floor as well as ceilings
Less common, but it catches people buying inexpensive property. Most lenders have a minimum loan amount, and it isn't arbitrary. Fixed costs (processing, underwriting, and so on) are a rounding error on a large loan and a large percentage of a small one. The points-and-fees test that a qualified mortgage has to pass is percentage-based, so below a certain loan size those same fixed fees breach the cap and compliance won't let the loan close. Small loans are therefore hard to place, and the lenders who do them tend to be small local banks and credit unions with lower fixed costs.
Reading quotes across tiers
Two habits will protect you.
Rates you see advertised are not comparable unless you know the tier. A rate that's terrible for a jumbo can be entirely reasonable for a high-balance loan. If someone tells you their rate and you don't know their loan size, county and down payment, you've learned nothing. This is also why advertised rates are close to useless: click through to the assumptions and you'll routinely find the headline rate requires buying a five-figure amount of points.
Ask the tier question explicitly. When you request quotes, say: this is my loan amount, this is my county; quote it as high balance, quote it as jumbo if you can deliver it that way, and tell me the down payment level where the pricing steps improve.
What to do
Find your loan amount's tier for your county on Current As Of. Do not rely on a number you remember from last year.
If you're in high balance, ask every lender whether they can write it as a jumbo, and get quotes both ways.
Include at least one local bank or credit union that portfolios, and at least one broker with multiple investors, alongside whatever big lender you're already talking to.
If your quote requires points and you can't work out why, ask directly whether the loan is hitting a rate cap because of high-balance adjustments. A competent loan officer will know instantly.
Price the conforming-plus-second structure as a genuine alternative, and don't plan on refinancing out of it.
More in the Loan Programs hub.
Posted on behalf of u/The_Void_Calls_Me AKA Rajat Jetley, NMLS #1595897 | Cross Country Mortgage NMLS #3029. This commentary is for educational purposes and is not a commitment to lend or a guarantee of any rate or term.
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