Mohammad S Anwar > Algorithm-NIN-1.04 > Algorithm::NIN
Module Version: 1.04

# NAME

Algorithm::NIN - Interface to UK's National Insurance Number.

Version 1.04

# DESCRIPTION

This modules lets you validate UK National Insurance Number. This also has functionalities to format and calculate the NI.

# METHODS

## validate()

This method accepts National Insurance number and validate it against the UK format. For more information please visit http://en.wikipedia.org/wiki/National_Insurance_UK

```    use strict; use warnings;
use Algorithm::NIN;

my (\$ni, \$status);
\$ni     = 'AA123456C';
\$status = Algorithm::NIN::validate(\$ni);

# or

\$ni     = 'AA 12 34 56 C';
\$status = Algorithm::NIN::validate(\$ni);```

## format()

This method accepts National Insurance number and returns back in the pair format. For example 'AA1234546C' would become 'AA 12 34 56 C' as it appears on NI card.

```    use strict; use warnings;
use Algorithm::NIN;

my (\$ni);
\$ni = 'AA123456C';
\$ni = Algorithm::NIN::format(\$ni);```

## calculateNI()

Returns NI contributions (approx) according to HMRC website http://www.hmrc.gov.uk/rates/nic.htm It only covers fiscal year 2009-10, 2010-11 & 2011-12.I don't claim the number you get back is exactly what you see in your pay slip. This is simply my attempt to understand the internal of mathematics behind the NI contributions. Suggestion to improve the functionality is highly appreciated. This method accepts the following parameter as hashref.

```    +----------------+-------------------------------------+
| Key            | Values                              |
+----------------+-------------------------------------+
| fiscal_year    | '2009-10' or '2010-11' or '2011-12' |
| gross_per_week | 60000, when no class is provided    |
| annual_profit  | 5000, only when class is 4          |
| self_employed  | 1 or 0                              |
| married        | 1 or 0                              |
| sex            | 'm' or 'f'                          |
| class          | 1 - for employed                    |
|                | 2 - for self employed               |
|                | 3 - for voluntary contributions     |
|                | 4 - for self employed               |
+----------------+-------------------------------------+

use strict; use warnings;
use Algorithm::NIN;

my (\$ni);
\$ni = Algorithm::NIN::calculateNI({
fiscal_year    => '2010-11',
gross_per_week => 65000,
self_employed  => 1,
class          => 2 });

# or

\$ni = Algorithm::NIN::calculateNI({
fiscal_year => '2010-11',
class       => 3 });

# or

\$ni = Algorithm::NIN::calculateNI({
fiscal_year   => '2010-11',
annual_profit => 10000,
self_employed => 1,
class         => 4 });

# or

\$ni = Algorithm::NIN::calculateNI({
fiscal_year    => '2010-11',
gross_per_week => 450,
self_employed  => 0,
married        => 0,
sex            => 'f' });

# or

\$ni = Algorithm::NIN::calculateNI({
fiscal_year    => '2010-11',
gross_per_week => 450,
self_employed  => 0,
married        => 1,
sex            => 'f' });```

# AUTHOR

Mohammad S Anwar, `<mohammad.anwar at yahoo.com>`

# BUGS

Please report any bugs or feature requests to `bug-algorithm-nin at rt.cpan.org`, or through the web interface at http://rt.cpan.org/NoAuth/ReportBug.html?Queue=Algorithm-NIN.I will be notified, and then you'll automatically be notified of progress on your bug as I make changes.

# SUPPORT

You can find documentation for this module with the perldoc command.

`    perldoc Algorithm::NIN`

You can also look for information at:

# TODO

Following NI contributions scenarios are NOT yet covered.

• Employer's contracted-out rebate, money-purchase schemes
• Employer's contracted-out rebate, salary-related schemes
• Employee's contracted-out rebate
• Special Class 2 rate for share fishermen
• Additional primary Class 1 percentage rate on deferred employments
• Additional Class 4 percentage rate where deferment has been granted