Accelerated biweekly vs. monthly: the saving comes from one extra payment a year, not the schedule.

Regular biweekly is calculated as the monthly payment multiplied by 12, divided by 26 — it just re-slices the same annual total into 26 smaller payments. Accelerated biweekly is calculated differently: the monthly payment simply divided by two. Because 26 accelerated payments a year add up to more than 12 monthly payments, the accelerated version is the only one that actually pays down more.

The same logic extends to weekly frequencies: regular weekly divides the monthly payment by 12 and multiplies by 52, again just resizing the same annual total; accelerated weekly divides the monthly payment by four, which produces the same extra-payment effect as accelerated biweekly, just spread across more, smaller payments.

With accelerated payments, a client is effectively making the equivalent of one extra monthly payment every year, and that extra amount goes straight toward the principal balance. It's not a lower rate and it's not a fee reduction — it's simply paying the loan down faster, which is what saves money on interest over the life of the mortgage.

Because interest on a mortgage is calculated on the outstanding balance, a lower balance earlier in the amortization means less interest accrues on every subsequent payment too — the effect compounds gradually across the life of the mortgage rather than showing up as a single one-time saving.

The exact number of years shaved off and dollars saved depends on the mortgage's balance, rate, and remaining amortization, so it's worth running the specific numbers for a client's file rather than quoting a generic figure — but the direction is consistent: accelerated payments meaningfully shorten the amortization and reduce total interest paid, simply by directing one extra payment a year to principal.

The naming inconsistency across lenders is a real practical problem — some advertise “biweekly” when they mean the accelerated version, and vice versa. The only reliable way to know which a client actually has is to check the payment amount itself against the two formulas above, not the label on the statement.

Generally, yes. Payment frequency is typically a straightforward option a client can select or change within their mortgage contract's terms, separate from the prepayment privileges that carry annual caps and penalties for exceeding them. It's still worth confirming the exact rule with the lender, since terms vary by contract.

This makes it one of the lowest-friction changes a broker can suggest to a client at any point during a term, not just at renewal — unlike a lump-sum prepayment or a break-and-switch, there's typically no cap, no penalty calculation, and no paperwork beyond a request to the lender.

1. 01Confirm the lender's exact formula for accelerated versus regular biweekly — the naming isn't always used consistently.
2. 02Compare the modest per-payment increase against the interest saved and the years shaved off the amortization.
3. 03Check whether the client also has an unused lump-sum prepayment privilege that could compound the effect further.

This is a natural conversation to build into a broker's post-close follow-up system rather than leaving it for the client to raise on their own — and it's the kind of routine file-level detail Treadstone's fulfillment associates handle so a broker doesn't have to track it manually across an entire client base.

It's a low-friction way to add real value well after a deal has closed: no new application, no new underwriting, just a short conversation and, if the client agrees, a form submitted to their existing lender. Clients tend to remember that kind of proactive, no-cost outreach far longer than they remember the closing paperwork itself.