annualTurnover > $const.registrationThresholdImmediate ? 'immediately (no deferral above 55 000)' : annualTurnover > $const.registrationThresholdDeferred ? '1 January next year' : 'not required'
Rates and thresholds
The expressions above read these as $const. They are the figures the annual refresh replaces, so they live as data rather than being written into the formulas — which is what makes a year-on-year change a one-line diff instead of an edit to arithmetic.
Constant
Value
standardRate
0.21
reducedRate1
0.05
reducedRate2
0.12
registrationThresholdDeferred
50000
registrationThresholdImmediate
55000
Test vectors (7)
Every case is executed against this model on each build, by the Java engine and independently by a JavaScript one. A mismatch of a single cent fails the build, so the page cannot ship advertising a figure the model no longer produces.
Case 1 — S1 100.00 EUR net at the standard rate
given amount
100
given direction
add
given category
standard
given reverseCharge
no
given annualTurnover
0
expect vatAmount
21
expect grossAmount
121
expect netAmount
100
Case 2 — S2 121.00 EUR gross back to net at the standard rate
given amount
121
given direction
remove
given category
standard
given reverseCharge
no
given annualTurnover
0
expect netAmount
100
expect vatAmount
21
Case 3 — S3 100.00 EUR net at the 12% reduced rate
given amount
100
given direction
add
given category
reduced2
given reverseCharge
no
given annualTurnover
0
expect vatAmount
12
expect grossAmount
112
Case 4 — S4 100.00 EUR net at the 5% reduced rate
given amount
100
given direction
add
given category
reduced1
given reverseCharge
no
given annualTurnover
0
expect vatAmount
5
expect grossAmount
105
Case 5 — S5 under 50 000 EUR: no obligation
given amount
100
given direction
add
given category
standard
given reverseCharge
no
given annualTurnover
45000
expect mustRegister
false
expect payerFrom
not required
Case 6 — S6 inside the 10 % tolerance: may defer to year end
The whole model as JSON — inputs, outputs, formulas, vectors and sources in one re-runnable document.
This model is published under CC BY 4.0: use it, adapt it, build on it, with attribution. The licence covers the model — the expression of each rule and the arrangement of the catalog. The rates and thresholds are law, and nobody licenses those; the sources above are where they come from.