Velocity banking: how it works and the honest maths

Resources · Home loans and saving · 6 min read Advanced

Key points

• Velocity banking uses a line of credit to pay “chunks” off a home loan, then runs your income and spending through that line of credit.
• The only thing that actually pays the debt down is your surplus: income minus spending.
• In a worked example, it finished one month sooner than plain extra repayments, and with a higher credit line rate it was no faster.
• It relies on a credit line, a variable rate and steady spending discipline, so the risks deserve as much attention as the maths.

What velocity banking is

Velocity banking is a way of paying off a home loan that gets talked up mostly online. You need a revolving line of credit to do it. Usually that’s a home equity line of credit (HELOC), and some versions use a credit card. Similar products exist in other countries, though the terms and names vary.

Here’s how it usually goes:

1. Draw a lump sum (“chunk”) from the line of credit and pay it straight onto the home loan.
2. Have your whole pay deposited into the line of credit, which pushes its balance down.
3. Pay all your bills and spending, including the regular home loan repayment, from the line of credit.
4. When the line of credit is back near zero, draw another chunk. Repeat.

Fans of the method say it’s faster because your income starts “working” against debt the moment it arrives.

Where any saving really comes from

The chunk doesn’t reduce what you owe. Not by a cent. It just moves debt from one place to another. And if the line of credit charges a higher rate than the home loan (often the case, though not always), each chunk costs you a bit more in interest while it’s sitting there.

What actually shrinks your debt is your surplus, the money left once you’ve paid for everything. If you’ve got $500 left over each month, that $500 is what pays the debt down. It doesn’t matter which account it passes through on the way.

There is one real effect, though. When your pay lands in the line of credit, it pulls that balance down for a few weeks before you spend it. That trims the interest slightly. In effect, your spending money is parked against debt instead of sitting in an everyday account earning little or nothing.

So the honest question is this. Does that “parking” benefit beat the higher rate you pay on the chunks?

A worked example of velocity banking

Assumptions (the same maths works in any currency):

• Home loan: $300,000 at 6% a year, charged monthly, with a required repayment of $1,798.66 (30-year term)
• Take-home pay: $7,000 a month, paid on day one
• Spending: $4,701.34 a month, spread evenly across a 30-day month
• Surplus: $500 a month
• Line of credit: 8.5% a year, interest worked out daily on the balance and charged monthly
• Chunks of $10,000, drawn whenever the line of credit is cleared
• Rates never change and spending never goes over plan

Option A, extra repayments: you pay the required repayment plus the $500 surplus into the home loan each month. Your pay sits in an everyday account earning nothing until it’s spent.

Option B, velocity banking: the steps above, with the same income, spending and surplus.

These figures come from a month-by-month calculation using those assumptions. Velocity banking results also hang on timing: the day your pay lands, when the chunk is drawn, and how spending falls across the month. Different reasonable timings shift its interest total by a few thousand dollars either way. So treat the B rows as approximate.

The results:

With the line of credit at 8.5%, velocity banking came out roughly $2,500 ahead and about a month sooner in this model. At 10%, the gap shrank to roughly $1,100, with the same finish date. Give it less favourable timing and it can come out behind.

Now look at the bigger picture. Both options took over 12 years off the 30-year term. Nearly all of that came from the $500 surplus. Not the method.

One more comparison. Keep the same extra repayments, but hold the average idle spending money ($2,350.67) in an offset account linked to the home loan instead (a feature some loans have in some countries). That gave 17 years 7 months and $182,835.81 of interest, with no second debt.

What the example leaves out

Real life is messier than a spreadsheet, and a few things can swing the result.

Rates, for one. Lines of credit usually have variable rates, and a rise hits the whole drawn balance. Fees matter too, since any annual or account fees on the line of credit eat into the saving.

Then there’s spending creep. This is the big one. When every purchase runs through a credit line, overspending gets very easy. If your spending rises by even a few hundred dollars a month, the surplus shrinks, and the whole benefit can shrink or vanish with it.

And remember what’s on the line. A HELOC is secured against your home. Fall behind and your home is at risk.

The credit card versions are a different animal. Card rates are usually far higher than home loan rates, so carrying a chunk on a card for months generally costs more than it saves.

The takeaway

Velocity banking doesn’t create money. In some setups it saves a little interest by parking idle cash against debt. In others it costs you more. Some people like the structure it gives them. Others would rather keep it simple and pay the same surplus straight into the loan. Which way the maths falls for you depends on your rates, your fees and how steady your spending really is.

Common questions

Does velocity banking really work?

It can pay a home loan off sooner, but nearly all of that comes from your surplus, not the method. In the worked example, it was about a month faster in the more favourable case. With a higher credit line rate, it was no faster at all.

Is velocity banking risky?

It leans on a line of credit, usually with a variable rate, and on you keeping your spending steady. A HELOC is secured against your home, so falling behind puts your home at risk.

Can you do velocity banking with a credit card?

Some versions use one. But card rates are usually far higher than home loan rates, so carrying a chunk on a card for months generally costs more than it saves.

Try it

To see what a regular extra repayment does on your own loan, try the home loan extra repayments calculator. To see your whole debt picture, find your Freedom Date.

General information only, not financial advice. Your situation is your own.