Below are the formal and polite equivalents (synonyms) of 'because' which you can use in your business or professional pieces of writing:

Due to the fact that

Is used in exactly the same way as 'because'.

'The date of this week's meeting has been rescheduled to Thursday, due to the fact that the results of the testing will not be availble until then.'


You can also just use 'due to'. But if you do, it should only be followed by a noun or noun phrase (e.g. 'the heavy rain').

'Due to a prior arrangement, I am afraid that I will not be able to attend the presentation.'

Owing to the fact that

Is used in exactly the same way as 'because'.

'Owing to the fact that three of the attendees are unable to attend, the date of next week's meeting has been rescheduled to Thursday.'


You can also just use 'owing to'. But if you do, it should only be followed by a noun or noun phrase (e.g. 'the heavy rain').

'The delay in the delivery of your order was owing to an issue with our ordering software.'

On account of the fact that

Is used in exactly the same way as 'because'.

'On account of the fact that three of the attendees are unable to attend, the date of next week's meeting has been rescheduled to Thursday.'


You can also just use 'on account of'. But like the two previous synonyms, if you use this shortened version, it has to be followed by a noun or noun phrase (e.g. 'the heavy rain').

'On account of a prior arrangement, I am afraid that I will not be able to attend the presentation.'


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