Reading room
Guides from the ledger.
Last reviewed July 14, 2026
The calculators show you what the numbers are. These guides explain why the numbers behave the way they do — and, more usefully, when the obvious answer is the wrong one.
Each guide is written against primary sources: the statute, the regulation, or the agency handbook that actually sets the rule, rather than another site's summary of it. Sources are listed at the foot of every piece so you can check them. Each one pairs with a tool on this site, so you can read the idea and then test it against your own loan.
Getting the loan
From application to the closing table — reading the paperwork, timing the rate, and knowing which numbers are fixed and which are yours to negotiate.
How to read a Loan Estimate: the form built for comparison
Three standardized pages, built so you can compare lenders line for line. Here is what every section means — and which numbers are allowed to change before closing.
Read the guide →Rate locks: when to lock, and what it actually costs
A lock freezes your rate against a moving market — for a price, and for a deadline. When to lock, what an extension costs, and what a float-down is really worth.
Read the guide →Pre-approval vs. pre-qualification: verified beats stated
One is a guess based on what you say. The other is a verified commitment based on your documents. Sellers know the difference, and so should you.
Read the guide →Closing costs: what they are, and what's actually negotiable
Two to five percent of the loan, split into fees you can shop, fees you can't, and money that was always yours. Plus who else can pay them for you, by loan type.
Read the guide →APR vs. interest rate: the comparison number with a hidden assumption
APR is supposed to make comparison easy. It quietly assumes you keep the loan for thirty years — and if you won't, it flatters exactly the wrong loans.
Read the guide →Choosing the loan
Which programme, which rate structure, what you pay to buy the rate down — the decisions made before you sign, where the arithmetic is least forgiving and the defaults quietly cost the most.
FHA, VA, USDA, or conventional: which loan type actually fits
Four programmes, four different bargains. The right one is decided by your down payment, your service history, and where the house is — not by the headline rate.
Read the guide →Adjustable-rate mortgages in 2026: read the caps, not the teaser
The teaser rate is the bait. The caps are the loan. Here is how to read a 7/6 SOFR ARM and price the worst case before you sign.
Read the guide →Discount points: when buying down your rate actually pays off
Points are just prepaid interest. Whether they pay off is a single division problem — and the answer is almost always the same number of years.
Read the guide →Conforming vs. jumbo: the 2026 limit, and why crossing it changes everything
One dollar over the line and the whole loan changes character. The 2026 limit is $832,750 — and there are ways to stay under it.
Read the guide →The FHA mortgage-insurance trap: when it never goes away
Conventional PMI is designed to end. FHA insurance, with a low down payment, is designed not to. The only exit is a refinance you have to go and get.
Read the guide →15-year vs. 30-year mortgage: the real trade-off
The 15-year saves a startling amount of interest — but the decision is about risk and flexibility, not just the interest line. How to think it through, with a third option most people miss.
Read the guide →Paying down the loan
The loan you already have is the one you have the most control over. These pieces cover every lever you can pull on it — and what each one really costs.
Recast, refinance, or prepay: three ways to change a loan you already have
Three tools, three different jobs. One of them costs you six figures in interest and is routinely recommended as though it were free.
Read the guide →Biweekly mortgage payments: the trick, the fee, and the free version
The savings are real. The product sold to deliver them is not necessary, and the version that costs nothing does the same job.
Read the guide →Pay off the mortgage early, or invest the money?
The comparison nearly everyone makes — mortgage rate against expected stock returns — is the wrong one, and it is wrong in a direction that flatters investing.
Read the guide →How to actually get PMI removed: the request, the appraisal, and the stall
Federal law gives you three separate rights. They trigger at different times, and the one that rewards your extra payments is the only one you have to ask for.
Read the guide →How extra mortgage payments actually work
Why a dollar of extra principal saves more than a dollar, why timing matters more than amount, and the honest case for not prepaying your mortgage.
Read the guide →How PMI works and when it goes away
What private mortgage insurance actually covers, what it costs, the three ways to get rid of it, and when paying PMI is a perfectly rational choice.
Read the guide →Refinancing
When replacing the loan you have beats keeping it — the two kinds of refinance, the equity tools beside them, and the break-even that decides all of it.
Rate-and-term vs. cash-out: the two refinances do opposite things
The two refinances do opposite things: one shrinks what you pay, the other grows what you owe. Confusing them is how people turn a rate cut into a bigger debt.
Read the guide →Cash-out refinance vs. HELOC: don't re-price a cheap mortgage
Both turn equity into cash. But a cash-out re-prices your entire mortgage, while a HELOC touches only the new money — and in 2026 that difference is enormous.
Read the guide →The no-closing-cost refinance: who's actually paying
There's no such thing as free. A no-cost refinance moves the bill into your rate — and whether that's smart is the same break-even question as everything else.
Read the guide →FHA Streamline and VA IRRRL: refinancing on the fast lane
If you already have an FHA or VA loan, there's a fast lane to a lower rate — no appraisal, little paperwork. Powerful, with one catch worth knowing on the FHA side.
Read the guide →The refinance break-even: when it actually pays to refinance
The whole refinance decision fits in one division problem — plus one trap that a lower monthly payment is very good at hiding.
Read the guide →Living with the loan
The costs that keep moving after you move in — escrow, insurance, property tax — and what to do when money gets tight.
Why your mortgage payment went up (on a fixed-rate loan)
Your rate is fixed, so why did the payment jump? The answer is almost always escrow — and a rise in taxes or insurance hits you twice, not once.
Read the guide →Homeowners insurance in 2026: why it's soaring, and what to do
Premiums are up roughly 70% in five years, and your lender requires the coverage. Why it's climbing, and the levers that actually lower the bill.
Read the guide →How to appeal your property tax assessment (and why most people don't)
Up to 60% of homes are over-assessed, but under 5% of owners appeal — and appeals win 40-60% of the time. It's free to file and can't raise your bill.
Read the guide →Missed a mortgage payment? Your options before foreclosure
Falling behind isn't the end, and it isn't rare. Federal rules give you months and a menu of options before foreclosure — but only if you pick up the phone.
Read the guide →Tax and the mortgage
What the deduction is worth, who it is worth it to, and why the answer for most households is nothing at all.
Reference
Two pages underpin everything else here. The mortgage glossary defines the vocabulary — APR against note rate, points, escrow, PMI, recasting — in plain language. The calculation methodology sets out every formula and assumption used on this site, so that any figure published here can be checked rather than taken on trust.