I have a client who deferred $25,000 in 2019 to his 401k plan via his W-2.

He also received a 1099 for $180,000 for another job and wants to contribute to a SEP plan. Is he able to contribute 25% of the $180,000 to a SEP plan....or is the overall limit maxed at $56,000 (meaning the max he can contribute to the SEP is $56,000 less the $25,000 he contributed to his 401k)?