Unlike Income Tax which is cumulative and assessed across all earnings, National Insurance starts from zero on each individual employment and you also pay National Insurance on Self Employed earnings.
So if you are a Director of multiple businesses paid as an employee its easy to see how you could over pay and you might not even realise because National Insurance is not shown on your Self Assessment Return.
You can also over pay National Insurance if you are a part time employee with multiple employers and irratic earnings, this because National Insurance is calculated on a weekly/monthly basis, not a cumulative basis and its by employer.
What you need to do
Write to HM Revenue and Customs confirming:
your National Insurance number
why you’ve overpaid
the tax year(s) you’ve overpaid
You should include your P60 or a statement from your employer showing the tax and National Insurance for each year you’re claiming for.
You should apply within 6 years of the tax year you’re claiming for.
HM Revenue and Customs
National Insurance Contributions Office
Benton Park View
Newcastle upon Tyne
How does it work for Cashback claims? (launched 28th January 2013)
To qualify for the Cashback householders must:
• have a Green Deal assessment carried out on the property
• get and agree quotes from a Green Deal Provider (this could be directly with a national brand or through a local tradesperson linked with a Provider)
• apply for Cashback voucher online or by phone.
Your Provider may be able to do this for you – ask them
• complete works within three months (six months for solid wall).
Householders can fund improvements through a Green Deal Plan, or pay in other ways, and get the Cashback but they must use a Green Deal Provider to arrange the work. The more improvements a householder makes, the bigger the Cashback.
Householders can only make one claim for the Cashback, but it may cover a package of improvements recommended by the Green Deal assessment. The Government Cashback is separate and additional to any similar offers that may be made by Green Deal Providers.
Customers will receive a cashback payment once Providers have confirmed work has been carried out and the Energy Performance Certificate has been updated. https://www.gov.uk/government/uploads/system/uploads/attachment_data/file/65572/6715-the-green-deal-cashback-for-energy-saving.pdf