keepingquiet if you are receiving a state pension you will not be paying National Insurance, so NI changes to your income.
As far as I know there were no changes to taxation in the budget that should change your tax code.
All that happened that directly affects everyone is that the Chancellor did not increase the minimum income level at which you begin to pay tax.
As things stand no one pays any tax on the first £12,570 of their income. If your income is below that you will pay no income tax at all. You then pay 20p in the £ on the next £37,500 of income.
The personal tax allowance used to be increased every year in line with inflation, but this government has not been doing this and doesn't plan to do this for the next 4 years.
I will try to give a simple example of how this works. Let us say that last year your income was the same as the personal tax allowance, £12,570. If inflation was 10% then this figure should also go up by 10% (12,570 + 1257) to £13,827. It would mean that if your income went up by 10%, you would pay no more tax because your income was still no higher than the personal tax allowance.
However, what is happened is that the government has refused to raise the personal tax allowance so that it remains at £12,570, so if you get any extra money this year - like the rise in the state pension, you will have to pay tax on it.
So keepingquiet your monthly tax bill will have increased because you are now paying tax on any increase in income you have received since 5 April.
The basic state pension went up from £156.20 to £169.50. An increase of £13.30 a week. If your total income is above £12,570 that £13.30 will be taxed at 20%, which equals £2.60 a week, £10.40 a month, plus a similar tax on any extra income from any kind of work or personal pension.
there will be no change in your tax code.