Interest rate help

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Can someone explain to me how the total balance after a year of this example is what it is?
I had been looking at taking this account out but I can’t see how there’s only £162 interest at 5%. It’s calculated daily.
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As it's a regular saver you don't have the full balance in there for a year - only the first £500 gets the full 12 months interest. The second £500 gets 11 months interest... And the last £500 gets a mere 1 month's interest.
Overall it works out as about half the "headline" rate, depending on exactly when you start saving (as not all months are the same length), and plus a little for compounding.
In the second month you deposit £500, you get your interest on £1002.08 for that month. (1/12th of 5% - £4.17 interest approx)
In the third month you deposit £500, you get your interest on £1506.25 for that month. (1/12th of 5% - £6.27 interest approx)
4 - £2012.52 (£8.39)
5 - £2520.90 (£10.50)
6 - £3031.40 (£12.63)
7 - £3544.03 (£14.77)
8 - 4058.79 (£16.91)
9 - 4575.70 (£19.65)
10 - 5094.76 (£21.23)
11. £5615.99 (23.40)
12. £6129.38 (£25.58)
Total: £6154.95 (This is different to your total illustrated - as I'm calculating monthly - and they are calculating daily - but you can see how it works - it would do the same for each of the days - 1/365th - some months are longer than others - so that would have a minor impact on the total as well as your £500 wouldn't be deposited on exactly the same timescale each time) (I think I've got my maths right - but happy to be corrected if I'm wrong)
You're not getting 5 percent interest on £6000 if that's what you're thinking, as the £6000 isn't all there from day 1.
The 5 percent interest is for a year - so each month they pay interest you get 1/12th of the 5 percent - or as you mention interest is calculated daily - so each day you'll get 1/365th of 5 percent of whatever the balance is that day. Each time you go up £500, the 1/365th will be a little more in £ note terms.
so is this case scenario the same for all savings accounts?
As always, check the terms and conditions, but anything else is uncommon.
However, Barclays have an account which pays 5% on up to £5,000 which can be deposited on day 1.
In this case, after 1 year the interest earned on £5k will be £5,000 x 5% which is £250.