Effective June 1, 2015, the daily limit per credit card account is $24,999.99.
Debit transactions have no daily limit.

All credit card and debit card payments are processed through the Department
of the Treasury's Pay.gov system. The new daily limit for credit cards is
enforced through the Pay.gov system. If cardholders exceed the daily limit,
a message will indicate that the maximum daily limit has been reached and
the payment will be rejected.

If you have any questions, please contact autoauctions@gsa.gov for more information.