Velocity Banking Calculator

What velocity banking actually is

The pitch: open a HELOC, draw a lump — a chunk — and throw it at your mortgage principal. Then route your whole financial life through the line: your paycheck is deposited into the HELOC, your bills are paid out of it. Because a HELOC charges interest on the average daily balance, your income “parks” against the balance for part of each month and shaves the interest. When the line is clear, take another chunk. Repeat until the mortgage is gone.

Set aside the branding — the “velocity of money,” the “banking on yourself” language, the whiteboard diagrams — and one question decides everything: does routing your spare money through a 9% HELOC beat handing the same spare money straight to a 6.5% mortgage? Both plans are powered by exactly the same surplus. The HELOC does not create money. So we priced them side by side.

Does velocity banking actually work?

Yes, slightly, in the right conditions — and we want to be honest about that, because a debunk that cheats is worth nothing. We modelled the strategy generously: the chunk is only re-drawn once the line is fully clear (its cheapest rhythm), the paycheck parks in the HELOC exactly as advertised, and any surplus the line does not need goes straight onto the mortgage so no dollar idles. Under those friendly conditions, on the defaults:

Velocity banking wins by $1,835. Over twelve years, that is $13 a month — for a scheme that requires a lien on your house, a variable-rate line of credit, and running every dollar you earn through a loan account.

Here is the sentence the courses do not contain: paying $25 a month more onto your mortgage beats the entire strategy. No HELOC. No closing costs. No lien. No rate risk. No videos.

Where the saving really comes from

Notice what the table above shows: velocity banking does cut mortgage interest, by $6,674. That is the slide you are shown — the amortization schedule shrinking, the payoff date leaping forward. It is real.

The slide you are not shown is the next line: $4,839 of HELOC interest, charged to you for the privilege. Subtract one from the other and the famous strategy is worth $1,835. The trick is not that the numbers are fake. The trick is that you are only shown one of the two columns.

And the entire remaining benefit is the float — the few weeks each month when your paycheck sits against the line before your bills pull it back out. That mechanism is genuine: it avoids $3,225 of HELOC interest here. It is also the only thing keeping velocity banking above water. Turn the float off in the model — make the same surplus payment to the line at month end instead of parking your income in it — and velocity banking stops saving $1,835 and starts costing $2,761.

There is no velocity of money. There is a cash-parking trick worth $13 a month.

The advice that makes it worse

Every video says to take a big chunk. Arithmetic says the opposite, and this is the clearest evidence the advice is not coming from a spreadsheet. A bigger chunk means a bigger HELOC balance, outstanding for longer, at a rate higher than your mortgage’s. Same defaults, same everything, only the chunk changes:

The strategy is at its best when you barely use it. Follow the advice you paid for and you walk it straight off the edge.

The cliff — and who falls off it

This is the part that matters, and it is the reason we built the calculator rather than writing an opinion. A $15,000 chunk at 9% charges $112.50 a month in interest — and it charges that before a single dollar of your surplus touches the principal. The line eats first.

So if your genuine surplus is smaller than that bite, the balance never comes down. You have not accelerated anything. You have permanently moved 6.5% mortgage debt onto a 9% line, and secured it against the same house.

Below roughly $102 a month of real surplus, velocity banking loses money. With no surplus at all it costs $73,792 and leaves you in debt three years and three months longer than doing nothing.

Now ask who buys a mortgage-acceleration course. It is not the household with a comfortable thousand dollars spare every month; that household does not need a trick. It is the household that feels stuck, that has almost nothing left at the end of the month, and is told that velocity banking works because of how money moves rather than how much of it you have. The people the strategy is sold to are the people it damages. That is not an accident of the marketing. It is the marketing.

The risk nobody prices

Two more things this calculator can show you and a video cannot.

First, the break-even HELOC rate. On the defaults it is 11.20%, against a 6.5% mortgage. Stay below it and the plan works; go above it and it does not. But a HELOC is variable — typically pinned to the prime rate — and you are proposing to hold one for a decade. A two-point rise does not dent this strategy; it deletes it, and leaves you holding a lien on your home in exchange for nothing. The pitch treats today’s HELOC rate as a fact. It is a forecast.

Second, the thing the arithmetic cannot capture and we will not pretend it can: a HELOC is genuinely more flexible than a prepaid mortgage. Money you shovel into your mortgage principal is gone until you sell or refinance; money on a HELOC can be drawn back if you lose your job. That is a real advantage, and it is the strongest honest argument for keeping a line of credit open. It is not, however, an argument for chunking — you can have the HELOC as an emergency backstop without ever using it to buy $13 a month.

If you want to pay your mortgage off early, our mortgage payoff calculator shows what any extra payment does to your payoff date — and our $100 a month study shows what the boring version is worth. If the appeal was the flexibility rather than the arithmetic, price the line honestly with our HELOC payment calculator first.

Disclaimer: This calculator is for educational purposes only and provides estimates based on the numbers you enter. It is not financial, legal, or tax advice. Actual loan terms, rates, and payments depend on your lender and personal circumstances. All calculations run in your browser — nothing you enter is stored or sent anywhere.