This is what happened in Australia, one bank said "you can only use cash machines at our branches or pay for it" very soon every bank was charging their customers to use other banks (and sometimes their own) ATMs and EFTPOS (using a debit card in a shop).

Of course I'd shop around, as there were a few different types of bank accounts, Occasionally you could beat these charges:

First:
there were occasionally banks that gave you 6 free withdrawals per month from other banks ATMs and EFTPOS + unlimited withdrawals from their own ATMs, but it was like ISAs only available for a short time and they'd change the rules every year or two.

Second:
There were the $2/month accounts that would give you unlimited access to their own ATMs, but only 5 uses of EFTPOS/ATMs per month.

Third:
$10+/month accounts unlimited use of banks own ATMs, roughly 20 or 30 uses of other banks ATMs/EFTPOS per month.

Fourth
pay per transaction, this was usually $2 per withdrawal, about £1. If you were stuck with one of these accounts you got as much as you could in each withdrawal, generally about £250 per time!

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Whatever you do, do not let UK banks go down this route, if you have an account that's charging you to use an ATM switch banks now! If banks think they loose customers over this then they will soon give up on this silly game!

Also to help the banks out, yeah I know they've got all our cash already!!! Try wherever possible to use your own banks ATM for withdrawing cash, that way they'll be less likely to charge hideous ATM fees.

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more information:
BBC News - Nationwide fears 'domino effect' after ATM restriction

Nationwide fears 'domino effect' after ATM restriction


There are warnings that the Royal Bank of Scotland's decision to stop some customers using cash machines owned by rivals could have a "domino effect".
RBS said last month that it would limit access to some competitors' ATMs for nearly a tenth of its account holders.
Lloyds has also gone down the same route.


Now Nationwide has warned that the other banks may have to impose similar restrictions on basic account holders.
The concerns are raised in a letter from Nationwide director Mark Rennison to John Wilson, an SNP MSP and deputy convener of the Scottish Parliament's economy committee.


Mr Rennsion said: "This could lead to a situation where all other banks and building societies are forced to take similar measures."
RBS, which also owns Nat West banks, blamed its decision on its inability to recover the cost of its customers using other banks' cash machines and claimed it was "unsustainable" to offer free access to other bank ATMs for basic accounts.

A recent YouGov survey found that 77% of those polled in Scotland opposed the move.


In his letter Mr Rennison added: "The interchange fee is paid by a bank or building society when a card issued by them is used in a different provider's ATM.

"If a Nationwide customer uses an RBS ATM to withdraw cash or check their balance we will pay RBS a fee of between 20p and 30p for this service, to help cover costs such as installation, maintenance and servicing of that ATM, and vice versa if an RBS customer uses a Nationwide ATM we will receive the fee. "The combined impact of the decision by RBS/NatWest and Lloyds Group, will make it less viable for other banks and building societies to continue to offer a full ATM service for their customers."


Mr Wilson said he feared the move could make access to free cash machine withdrawals difficult for a large number of people in Scotland and he urged the UK government to take action.


He has written to financial institutions about the matter.
"The blow will be particularly felt by those on low incomes and people in rural communities," he said.
"This will affect the most vulnerable in our society and indeed undermines the banks own customers.
"At a time when banks like RBS should be trying to rebuild public confidence and their relationships with customers this action is alienating those who rely on their services."

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I find it odd that it's only 77% I mean, that's pretty low, I would think everyone doesn't want to pay extra for getting their own money from banks which are often propped up by the tax payer!