I get paid for piecework, not on a monthly wage.

我拿的是计件工资，不是月工资。

youdao

I get paid for piece work10, not on a monthly wage.

我挣的是计件工资，不是月薪。

youdao

His monthly wage is not more than one thousand dollars.

他的月工资最多不过一千元。

youdao

The England Women's rugby captain decided the summer months would be best spent dedicating herself to her sport and so, sacrificing the security of a monthly wage, she resigned from her job as an office manager to pursue her ultimate goal of winning the Women's World Cup.

BBC: England captain sacrifices all for World Cup glory bid

That's 31 times the monthly minimum wage.

FORBES: Waking Dead Capital

Another central banker, Jan Czekaj, was in agreement about the inflation problem, saying earlier this week that the latest monthly figures on Poland's wage growth were worrying.

FORBES: Poland's Rate Dilemma