Why are the P11D Inland Revenue Specs Different ....

Why are the P11D Inland Revenue Specs Different...

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for delivering the same data (presumably all data all goes into the same backend data depository/Db)

The specific area in question is delivering P11D data via:
- paper form
- magnetic media
- FBI
Just one example is the very basic concept of rounding; other examples are - allowable character set, case (upper/lower) of HMIT defined categories ie. property, multiple, other etc. and so on .... BUT we are dealing with the same data in all instances

Magnetic Media (eec1.pdf) & Paper Form
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2.6.1.6 Calculation and rounding errors
When carrying out calculations you must ensure that the total is free from rounding errors. All amounts must be returned as whole pounds, so pence should be
excluded from the calculations. If you are using a proprietary software package, this should already have been done for you

5.1.6 Calculations
Simple calculations, as described in the record descriptions below and on the paper P11D form, will be tested.
You must ensure that rounding errors do not appear in the return by rounding pence down to the next lowest whole pound prior to making the calculation.
- If the rule is a + b ...+ n = z, the calculation 1234.56 + 234.78 = 1469.34 must be presented as 1234 + 234 = 1468.
- If the rule is x - y = z, the calculation 1234.56 - 234.78 = 999.78 must be presented as 1234 - 234 = 1000.

FBI (p11d_business_rules06.pdf)
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7 Rounding
If it is 5 or less round down.
If it is 6 or more round up.
For example, if the NIC calculated was to result in:
£67.5558 the NIC payable would be £67.55, but if the NIC payable came to
£67.5568 the NIC payable would be £67.56.
Submitted to the gateway by the Internet software in pounds and pence

So which is correct - whole numbers or rounded to 2 dp and why are the two methods different?

Discrepancies like this are surely examples of the underlying malaise thoughout the Govenment system.

If major differences like this appear in one area then it is not unreasonable to expect them to appear in others.
JC

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