Math

Local context: the position in United Kingdom

The figures below reflect current UK practice, so Math can be used without converting anything by hand.

Key local facts

• Currency: Pound sterling, written £1,234.56. VAT of 20% is normally already included in advertised consumer prices.
• Income tax: Personal allowance, then 20% basic, 40% higher and 45% additional rate; Scotland operates its own separate bands.
• National Insurance: Class 1 contributions are paid by both employee and employer above the primary and secondary thresholds set by HMRC.
• Units: A mixed system: distances in miles and mph, fuel in litres but consumption in mpg, and body weight commonly in stones and pounds.
• Standards: Mains supply is 230 V / 50 Hz with BS 1363 Type G plugs; building work follows the Building Regulations and BS 7671 wiring rules.

Local examples

• Example — London: A tenant in London applies Math before renewing, comparing the result with the figure quoted by the letting agent.
• Example — Manchester: A tradesperson in Manchester uses Math to price a job, adding VAT at 20% only once the net figure is settled.

Every figure above applies to United Kingdom specifically and is reviewed when the rules change.