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Opis
English: Charges to w:UK income tax and w:National Insurance as a percentage of taxable/NICable pay for the tax year 6 April 2010 thru 5 April 2011. This takes account only of straightforward income tax and Class I employee NICs without contracted-out pension contributions.

Made in w:MATLAB and finished with w:Inkscape. See below for MATLAB source.

According to w:HMRC, the tax and National Insurance rates and allowances for 2010/11 are [1]:

Income tax (per annum)
  • Up to personal allowance, 0%: £6, 475pa.
  • Basic rate, 20%: First £37, 400pa above personal allowance.
  • Higher rate, 40%: £37, 401pa to £150, 000pa above the personal allowance.
  • Additional rate, 50%: Everything more than £150, 000pa above the personal allowance.
National Insurance contributions (per annum)
  • Up to primary threshold, 0%: £5, 720pa.
  • Up to 'upper earnings limit', 11%: First £38, 168pa above the primary threshold.
  • Above 'upper earnings limit', 1%: Everything more than £38, 168pa above the primary threshold.
Versions for earlier tax years can be found in the upload history, where the comments indicate to which year a particular version applies. Note that there are two versions for the 2008-9 tax year owing to the mid-year changes announced by the Government.
Datum
Izvor Sopstveno delo
Autor Splash
Dozvola
(Ponovno korišćenje ove datoteke)
See below. Licensing choices are applicable to both image and MATLAB source code.
SVG genesis
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The SVG code is valid.
 
This diagram was created with MATLAB.
Izvorni kod
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MATLAB code

function [it_pounds, it_pct, nic_pounds, nic_pct, total_pounds, total_pct, takehome_pounds] = tax(gross, tax_rates, tax_widths, claw_start, claw_rate, nic_rates, nic_widths, plot_all)
%TAX: Compute the pounds and percentage cost of taxable pay of income tax
%and National Insurance. (Or just tax in places without NI).
%
%[it_pounds it_pct nic_pounds nic_pct total_pounds total_pct takehome_pounds] = tax(gross, tax_rates, tax_widths, nic_rates, nic_widths, plot_all)
%
%Inputs:
%   GROSS:      Vector of taxable pay amounts to compute all outputs for.
%   TAX_RATES:  Percentages of tax rates matching entries in tax_widths.
%   TAX_WIDTHS: Width in pounds of each tax band, ended by Inf. NOT the
%   income levels at which they begin to apply. For example, for 2007-08:
%
%   Personal allowance, or 0% band          = £5225.
%   10% band = First £2230 taxable          = £2230 in width.
%   22% band = £2230 - £34600 taxable       = £32370 in width.
%   40% band = £34600 - (unlimited) taxable = £Inf in width.
%
%   Therefore, tax_rates and tax_widths are set up as follows:
%
%   TAX_RATES  = [ 0    10    22   40];
%   TAX_WIDTHS = [5225 2230 32370 Inf];
%
%   CLAW_START: Value of GROSS at which the clawback of personal allowance
%   starts.
%   CLAW_RATE: A 2-vector, [PER STEP], where PER is the clawback for each
%   increment in GROSS of STEP. E.g. a clawback of £1 for every £2 of GROSS
%   is expressed as CLAW_RATE = [1 2].
%
%   NIC_RATES:  As TAX_RATES. (Omit if no NIC-equivalent needed).
%   NIC_WIDTHS: As TAX_WIDTHS. (Omit if no NIC-equivalent needed).
%   PLOT_ALL :  Single boolean true/false whether to draw the output plot.
%
%Outputs:
%   These all have obvious names, and each produce a vector with entries
%   corresponding to the entries of input GROSS.

for g = 1:length(gross)
    it_pounds(g)       = tax_calc(gross(g), tax_rates, tax_widths, claw_start, claw_rate);
    it_pct(g)          = 100*it_pounds(g)/gross(g);

    nic_pounds(g)      = tax_calc(gross(g), nic_rates, nic_widths);
    nic_pct(g)         = 100*nic_pounds(g)/gross(g);

    total_pounds(g)    = it_pounds(g) + nic_pounds(g);
    total_pct(g)       = 100*total_pounds(g)/gross(g);
    
    takehome_pounds(g) = gross(g) - total_pounds(g);
end

if exist('plot_all', 'var') && plot_all

    %Plots for amounts in pounds
    figure;
    plot(gross, it_pounds, 'b', gross, nic_pounds, 'r', gross, total_pounds, 'm', gross, takehome_pounds, 'g');
    set(get(gca, 'Children'), 'LineWidth',2);
    set(gca, 'XMinorTick', 'off', 'YMinorTick', 'on');
    legend('Income tax', 'National insurance', 'Combined', 'Take home');
    xlabel('Annual taxable pay, GBP');
    ylabel('Annual amount, GBP');
    grid on;
    
    %Plots for percentages
    figure;
    plot(gross, it_pct, 'b', gross, nic_pct, 'r', gross, total_pct, 'm');
    set(get(gca, 'Children'), 'LineWidth',2);
    set(gca, 'XMinorTick', 'off', 'YMinorTick', 'on');
    legend('Income tax', 'National insurance', 'Combined');
    xlabel('Annual taxable pay, GBP');
    ylabel('Percentage of taxable pay');
    grid on;
end

%%%%Calculation engine%%%%
function total_tax = tax_calc(gross, rates, widths, claw_start, claw_rate)

tax_band    = 1;
income_left = gross;
total_tax   = 0;

%Clawback if necessary
if exist('claw_start', 'var') && exist('claw_rate', 'var')
    widths(1) = clawback(gross, claw_start, claw_rate, widths(1));
end

while tax_band <= length(widths) && income_left > 0
    taxable_this_band = min([widths(tax_band) income_left]);
    total_tax         = total_tax + taxable_this_band*rates(tax_band)/100;
    income_left       = income_left - taxable_this_band;
    tax_band          = tax_band + 1;
end

function new_limit = clawback(gross, claw_start, claw_rate, initial_limit)
%GROSS:      Vector of taxable pay amounts to compute all outputs for.
%CLAW_START: Values of GROSS at which the clawback starts
%CLAW_RATE: A 2-vector, [PER STEP], where PER is the clawback for each
%increment in GROSS of STEP. E.g. a clawback of £1 for every £2 of GROSS
%is expressed as CLAW_RATE = [1 2].
%INITIAL_LIMIT: The un-clawedback value to begin with.
%
%NEW_LIMIT is the clawed-back value of INITIAL_LIMIT.

claw_length = max(gross - claw_start, 0);
claw        = claw_rate(1) * floor(claw_length/claw_rate(2));
new_limit   = max(initial_limit - claw, 0);
</source>

;For the 2010-11 tax year:
<source lang="matlab">
tax_rates  = [0 20 40 50];
tax_widths = [6475 37400 112600 Inf];
claw_start = 100000;
claw_rate  = [1 2];
nic_rates  = [0 11 1];
nic_widths = [110*52 (844-110)*52 Inf];


Licenciranje

The following choices of licensing apply to both the image and also the MATLAB code presented above.

Ja, nosilac autorskih prava nad ovim delom, objavljujem isto pod sledećim licencama:
w:sr:Krijejtiv komons
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Ova datoteka je dostupna pod licencom Creative Commons Autorstvo-Deliti pod istim uslovima 3.0 Unported, 2.5 Generička licenca, 2.0 Generička licenca i 1.0 Generička licenca.
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GNU head Data je dozvola da se kopira, distribuira i/ili menja ovaj dokument pod uslovima GNU-ove licence za slobodnu dokumentaciju, verzije 1.2 ili bilo koje novije verzije koju objavi Zadužbina za slobodni softver; bez nepromenljivih odeljaka i bez teksta na naslovnoj i zadnjoj strani. Tekst licence možete pročitati ovde.
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Vikimedija Serbian (transliteracija): Splash
skraćeno ime autora Serbian (transliteracija): Splash

status autorskog prava Serbian (transliteracija)

zaštićeno autorskim pravima Serbian (transliteracija)

1. maj 2010

izvor datoteke Serbian (transliteracija)

sopstveno delo Serbian (transliteracija)

Istorija datoteke

Kliknite na datum/vreme da biste videli tadašnju verziju datoteke.

Datum/vremeMinijaturaDimenzijeKorisnikKomentar
trenutna02:25, 2. maj 2010.Minijatura za verziju na dan 02:25, 2. maj 2010.512 × 384 (220 kB)Splashupdated for tax year 2010-11
12:41, 27. april 2009.Minijatura za verziju na dan 12:41, 27. april 2009.501 × 391 (55 kB)Splashcorrected version of 2009-10
01:58, 27. april 2009.Minijatura za verziju na dan 01:58, 27. april 2009.496 × 387 (62 kB)Splashtry to fix layout of 2009-10 version
01:41, 27. april 2009.Minijatura za verziju na dan 01:41, 27. april 2009.496 × 387 (62 kB)Splashupdated for tax year 2009-10
01:40, 27. april 2009.Minijatura za verziju na dan 01:40, 27. april 2009.507 × 396 (65 kB)Splashrevision for change to income tax rates announced post-Budget by Chancellor, and backdated to start of tax year for pay dates from 7 Sep 08.
01:40, 27. april 2009.Minijatura za verziju na dan 01:40, 27. april 2009.573 × 414 (56 kB)Splash{{Information |Description={{en|1=Tax+NIC percentages of gross income for 2008-9. This file will hold versions for future years also.}} |Source=Own work by uploader |Author=Splash |Date=2009-04-27 |Permission= |other_versions= }} <!--{{Im

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