£30,000 a year (pa) gross salary gives you a net pay of £1,885 month salary after all UK income tax and national insurance payments in 2009-2010 tax period.For other net salaries after tax, please check the salary band on the left.30,000 a year (pa) gross salary gives you a net pay of £1,885 month salary after all UK income tax and national insurance payments in 2009-2010 tax period.