How do I pay monthly bills when I'm paid fortnightly?
Don't halve it. Multiply the monthly bill by 12 to get a year, then divide by 26, because a year has 26 fortnights, not 24. A $1,850 monthly bill becomes $853.85 a fortnight. Move that amount to a bills account every payday and the year balances out.
The short version
- Leah moves $853.85 to her bills account every payday, not $925, and the year balances.
- One transfer of $371.15 a fortnight (or $372 if they round up) covers every bill on the list.
- Do the sum for the whole list, then set one transfer. One automatic transfer each payday is far easier to keep up with than seven little ones.
Your rent, phone and insurance come out monthly. Your pay lands every second Thursday. Some months there's money left over, other months the bills account is scraping zero two days before payday, and it's hard to see why.
It isn't you. The two calendars just don't line up, and the usual fix, halving the monthly bill, quietly gets the maths wrong. Here's the rule that works, and why.
Why halving doesn't add up
A month is a bit more than four weeks. A year has 52 weeks, which is 26 fortnights. If you think of it as “two pays a month”, you're counting 24 pays and leaving two out.
So most months you get two pays, and a couple of times a year you get three. Those third pays are already part of your normal yearly income. They aren't a bonus. They're the reason the maths works.
Halving a $1,850 monthly bill to $925 a fortnight means you put aside $24,050 over a year for $22,200 of bills. That's $1,850 more than you need, a whole extra month of bills sitting idle. It won't hurt you, but that money could be in savings instead. Go the other way and set aside too little, and that's how a bills account runs dry.
The x 12 ÷ 26 rule
- Take the monthly amount.
- Multiply by 12 to get the cost for a whole year.
- Divide by 26 if you're paid fortnightly, or by 52 if you're paid weekly.
- Round up to the next dollar if you like a little give.
Worked example
Leah's $1,850 of monthly bills
Example only. Leah, a retail assistant in Ballarat, is paid every second Thursday. Her monthly bills (her share of rent, plus phone, internet and insurance) come to $1,850 a month.
| Step | Sum | Result |
|---|---|---|
| Turn the month into a year | $1,850 x 12 | $22,200 a year |
| Spread the year over 26 fortnights | $22,200 ÷ 26 | $853.85 a fortnight |
| If she were paid weekly instead | $22,200 ÷ 52 | $426.92 a week |
| Compare with halving the bill | $925 x 26 | $24,050, which is $1,850 more than the bills |
Leah moves $853.85 to her bills account every payday, not $925, and the year balances.
$853.85 x 26 comes to $22,200.10. The extra 10 cents is rounding.
The same trick works for bills that aren't monthly. Turn every bill into a yearly figure first, then divide by your number of pays.
- Weekly bill: x 52 to get a year
- Monthly bill: x 12
- Every two months: x 6
- Quarterly bill: x 4
- Yearly bill: it's already a year
- Then divide the yearly total by 26 (fortnightly pay) or 52 (weekly pay)
Worked example
one transfer for a mixed list of bills
Example only. Tom and Mei in Townsville have these household bills: phone and internet $160 a month, streaming $40 a month, power $620 a quarter, water $280 a quarter, car insurance $1,300 a year, rego $850 a year and home and contents insurance $1,500 a year. They're paid fortnightly.
| Step | Sum | Result |
|---|---|---|
| Phone and internet | $160 x 12 | $1,920 |
| Streaming | $40 x 12 | $480 |
| Power | $620 x 4 | $2,480 |
| Water | $280 x 4 | $1,120 |
| Yearly bills | $1,300 + $850 + $1,500 | $3,650 |
| Total for the year | $1,920 + $480 + $2,480 + $1,120 + $3,650 | $9,650 |
| Per fortnight | $9,650 ÷ 26 | $371.15 |
One transfer of $371.15 a fortnight (or $372 if they round up) covers every bill on the list.
Illustrative amounts only. Rego and insurance prices vary by state, vehicle and insurer, so use your own bills.
Set up a bills account that pays out monthly
The rule works best with an account that only does bills. Moneysmart suggests having separate bank accounts to make budgeting easier, such as one for bills and one for spending. When the bills money lives on its own, you can see at a glance whether it's all there.
- Work out your per-fortnight total using the rule above.
- Set an automatic transfer for that amount on payday, so it moves before you can spend it.
- Point every bill's direct debit at the bills account.
- What's left in your everyday account is yours to spend, without guessing.
Why it can still dip in the first few months
Even with the right amount going in, the account can dip early on. The yearly total is spot on, but the money and the bills don't arrive on the same days.
Take Leah's $1,850 of monthly bills with $853.85 going in each fortnight. In a two-pay month, $1,707.70 goes in, which is $142.30 short. In a three-pay month, $2,561.55 goes in, which is $711.55 over. Across the year, the ten short months and the two top-up months cancel out.
When your three-pay months fall makes a big difference to the start. Assuming the bills come out at the end of each month in 2026-27:
- A Thursday payday that started on 2 July 2026 got its first three-pay month straight away in July, so the account stays ahead all year.
- The other Thursday cycle, starting 9 July 2026, waits until October for its first three-pay month. By the end of September the account would be $426.90 behind.
Can you just change the due dates?
Sometimes. Many providers let you choose your due date, and some let you pay fortnightly. Moving bills to just after payday doesn't change the yearly total, but it makes the account easier to read. It's worth a look in the app or a quick call.
Your pay cycle is set by your employer. Fair Work says employees must be paid at least monthly, and your award or agreement usually sets whether that's weekly, fortnightly or monthly.
Once it's set up, a two minute check each payday keeps it honest:
- Did the transfer go through?
- Did any bill change price? If so, redo its yearly figure and the transfer.
- Is a big yearly bill coming up? Check the balance can cover it.
Key numbers
| What | Figure and source |
|---|---|
| Employees must be paid at least monthly | At least monthly Fair Work Ombudsman |
| Moneysmart suggests separate bank accounts to make budgeting easier | Separate accounts for bills and spending Moneysmart |
| Moneysmart budget planner allows any frequency per item | Weekly, fortnightly, monthly, quarterly or annually Moneysmart |
| Three-pay months for the two Thursday fortnightly cycles in 2026-27 | Cycle from 2 Jul 2026: July and December 2026. Cycle from 9 Jul 2026: October 2026 and April 2027 Our calculation from the calendar |
| Month-end bills balance for $1,850 monthly bills and $853.85 a fortnight, cycle from 9 Jul 2026 | Lowest point minus $426.90 at end of September 2026 Our calculation from the calendar |
Free official help
- Moneysmart budget planner
Free planner where you set each item as weekly, fortnightly, monthly, quarterly or yearly. - Moneysmart: How to do a budget
Step by step budgeting basics, including separate accounts and irregular costs. - Fair Work: Frequency of pay
How often employers have to pay you, and where your pay cycle is set. - Services Australia: Budget
Budgeting help, the Simple money manager and a link to free financial counselling.
Questions people ask
Is the third pay in a month extra money?
Not really. It's part of your normal yearly pay. If you use the x 12 ÷ 26 rule, the third pay is what tops up the bills account after the months where two pays came up a little short.
What if I'm paid weekly?
Same idea, divide the yearly figure by 52 instead. A $1,850 monthly bill works out to $426.92 a week.
Should I round the transfer up?
Rounding up to the next dollar, or the next $5, builds a small cushion and covers the few cents lost to rounding. It's a sensible habit.
Do I need a separate bank account for bills?
You don't have to, but it makes it much easier to see whether the bills money is all there. Moneysmart suggests separate accounts to make budgeting easier.
What about bills that change, like power?
Use last year's total from your old bills, add a little if prices have gone up, and recheck it every few months.
Get the free pay check sheet
Type in one fortnight's pay and bills and see where it all goes. Works in Excel and Google Sheets.
Keep reading
- What's a three-pay month, and is 2026-27 a 27-pay year for me?
7 min read
- How much buffer should sit in our bills account?
6 min read
- How do I save for rego, car insurance and other big yearly bills?
7 min read
- We get paid on different days. How do we run one budget?
6 min read
- All budgeting and pay day guides
Sources
- Moneysmart: How to do a budget. https://moneysmart.gov.au/budgeting/how-to-do-a-budget, accessed 2026-10-16.
- Moneysmart: Budget planner. https://moneysmart.gov.au/budgeting/budget-planner, accessed 2026-10-16.
- Fair Work Ombudsman: Frequency of pay. https://www.fairwork.gov.au/pay-and-wages/paying-wages/frequency-of-pay, accessed 2026-10-16.
- Services Australia: Budget. https://www.servicesaustralia.gov.au/individuals/subjects/manage-your-money/budget, accessed 2026-10-16.