Business Day Calculator NSW

How it works

NSW property contracts and many legal notices aren’t counted in plain calendar days — they’re counted in business days, meaning Monday to Friday, excluding both weekends and NSW public holidays. A clause like “settlement 42 business days after exchange” or “5 business days’ notice” only means one specific date once you know exactly which days get skipped, and being off by even one day can put a party in default under the contract.

This calculator only skips two things: Saturdays and Sundays, and public holidays gazetted for New South Wales specifically. That second part matters, because Australia doesn’t run on one national public holiday calendar — Victoria, Queensland and every other state and territory set some of their own dates, and even shared holidays like the King’s Birthday can fall on different days in different states. A calculator built around one state’s holidays can quietly give the wrong answer for a contract governed by another state’s law, so always check that the holiday calendar matches where your contract or notice actually applies.

Rather than working from a fixed list of holiday dates — which goes stale every year and can’t be reliably “remembered” for years that haven’t happened yet — this tool derives every NSW public holiday from the rule that actually defines it. New Year’s Day, Australia Day, Christmas Day and Boxing Day shift to the following Monday when they fall on a weekend; Anzac Day never shifts and is always observed on 25 April itself; King’s Birthday and Labour Day fall on a specific Monday of their month; and Good Friday, Easter Saturday, Easter Sunday and Easter Monday are all calculated from the date of Easter Sunday, using the standard Computus algorithm that tracks the first Sunday after the first full moon following the March equinox — the reason Easter lands on a different weekend every year. That means the calculator stays accurate for any year without an annual update to a hardcoded date list, though it can’t account for one-off additional holidays a government occasionally gazettes for a single year.

Worked example

Two parties exchange contracts on a NSW property sale on Wednesday, 19 August 2026. Rather than the standard 42 calendar day settlement, a special condition in this contract sets settlement at 42 business days after exchange — sometimes still described in conversation as a “6-week” settlement, even though 42 business days actually spans nearly 9 calendar weeks once weekends are excluded, noticeably longer than a plain 6-week (42 calendar day) period would.

Counting forward from exchange one day at a time, only weekdays that aren’t NSW public holidays add to the tally. Two things push the count past what a naive 6-week guess would suggest:

• 18 weekend days fall inside the counting window — nine full weekends between exchange and settlement — none of which count toward the 42 business days.
• Labour Day, Monday 5 October 2026, the first Monday in October, also falls inside the window and is skipped as an NSW public holiday.

Working through the count, the 42nd business day lands on Monday, 19 October 2026 — 61 calendar days after exchange. By contrast, if the same contract had specified 42 calendar days instead, settlement would fall 19 days earlier, on Wednesday, 30 September 2026. That gap is exactly why it matters which counting method a contract or notice actually specifies before relying on a settlement or deadline date.