Other benefit payments and employers' maternity pay among reasons for payment freeze
Maternity allowance for new mums on the Isle of Man hasn't increased for more than a decade because it's already higher than other social security benefits.
That's one of the reasons Treasury has given for not increasing the payment since 2011.
Treasury Minister Alex Allinson added maternity pay from employers was another factor against putting the allowance up.
The maximum rate per week has stood at £179.85 per week since 2011.
The details have been revealed following a Tynwald written question from Douglas North MHK John Wannenburgh.
Is the relationship between Manx Care and the DHSC getting stronger?
Windfarm project's clash with General Election described as 'unfortunate timing'
Former MHK says Manx National Day must be consistent
Former chief minister urges election candidates to 'fight for business'