Calculator
Biweekly vs Monthly: Where the Savings Come From
$10,000 at 18%.
- Monthly $400
- 2 years 8 months — June 2029, $2,628 of interest
- Biweekly $200
- 2 years 4 months — March 2029, $2,317 of interest
Saved: $311 and 3 months. Of that, $51 comes from the frequency alone; $260 comes from paying one extra month's worth each year.
Estimations only — based on the numbers you enter. Not financial advice.
Run both schedules on your balance → Free, no signup, your numbers stay on your device.
Most of the saving is not the frequency
$200 every two weeks is $5,200 a year. $400 every month is $4,800. The biweekly schedule finishes earlier mainly because it adds a 13th payment each year, not because paying more often earns a discount.
The comparison, two ways
Against $400 monthly, biweekly $200 saves $311 and finishes 3 months sooner. Split the same $4,800 into 26 payments of $184.62 and the saving drops to $51 — that smaller figure is the frequency effect alone; the rest is the extra payment.
What this means for the decision
If the goal is fewer months, the size of the annual total is the lever. Splitting it differently changes the result by a few tens of dollars. Both numbers are on this page so the two effects are not conflated.
Questions
- Is biweekly the same as making an extra payment each year?
- Effectively yes — 26 half-payments equal 13 full payments.
- Do lenders charge for switching to biweekly?
- Some third-party services charge a setup fee to run biweekly debits. The calculation above assumes no fee.
- Does the same logic apply to weekly payments?
- Yes, with diminishing effect — 52 weekly payments equal 13 monthly payments, the same one extra.
Other calculators: compare payoff orders · turn the result into a date