There is no limit set by IRS on a per month basis, however there is an annual limit to your contributions. Some employers do create restrictions on how much of your salary you can contribute, but that varies from employer to employer.
Assuming that you want to maximize your 401k for the year and you want to contribute an even amount per month, then you would contribute $16,500/12 = $1,375 per month. This does not include your employer match.
The maximum amount an employer can contribute to a 401k plan is 19,500 per year as of 2021.
The 401(k) maximums for 2009 was established based on a cost of living adjustment. The 2009 Basic maximum 401K contribution amount is set at $16,500. Catch up contributions allow a maximum of an additional $5,500. Catch up contributions would bring the total to $22,000 but you must be 50 years old and above for the additional allowed contribution amount. The 401k Basic maximum contribution figure is also true for the 403b (used by non-profits and educational institutions). But with the 403b there is also a $40,000 "catch up" provision and a 15-year (same employer) "catch up" provision. These are a bit confusing and are best explained by to the employee by the Third Party Administrator (TPA). In 2009 the entire 403b administration rules changed, too. The basic rules are explained more thoroughly at other sites on the web, but beware of the ever changing nature of these regulations and that postings on the internet are often out-of-date. One site, money-zine, (http://www.money-zine.com/Financial-Planning/Retirement/403b-Contribution-Rules/), which came up on a search on 3-27-09 and it is fairly comprehensive, doesn't include the 401k or 403b Roth after-tax contributions that can now be made or the TPA rules. To get the 'right answer' regarding 403b contribution maximums, please do more than Google searches and reading internet information. The IRS.gov site is helpful and has specific rules, but it really takes a knowledgeable TPA to give the correct information for an individual's specific situation. Per the referenced article another important point to remember regarding your 401k maximum contribution limit - the combined total maximum contribution that you can make each year to ALL 401k plans in which you participate, including standard 401k plans and Roth 401k plans - is the lower of: (1) the maximum percentage contribution limit allowed under each of your employers' plans, or (2) the dollar limits shown in the table above. For example, if your employer's 401k plan allows you to contribute up to a maximum of 10% of your salary, and you earn $50,000, your maximum contribution limit is $5,000, not the $16,500 contribution limit in 2009 that applies only to higher-paid employees
The maximum Roth IRA contribution for married couples in 2022 is 12,000, or 6,000 per individual.
The maximum contribution limit for an Employee Stock Purchase Plan (ESPP) in 2022 is 22,500 per calendar year.
Whatever monies you contribute to 401k you do not pay income tax on now. You pay tax when you withdraw it, after retirement. So you get the benefit of your money growing tax free. For instance if you contribute $100 per month to a 401k that money grows faster than if you contributed after tax where the amount would be say $75 per month. But be aware there are heavy penalties for using that money prior to retirement.
The maximum amount an employer can contribute to a 401k plan is 19,500 per year as of 2021.
The maximum tax deductible contributions allowed by the IRS to be made to a 401K plan per year is lesser than fifteen percent of ones income. If one is over the age of 50, the IRS allows an additional $5,500 per year. These numbers change based on the IRS formulated costs of living per year.
annual
The 401(k) maximums for 2009 was established based on a cost of living adjustment. The 2009 Basic maximum 401K contribution amount is set at $16,500. Catch up contributions allow a maximum of an additional $5,500. Catch up contributions would bring the total to $22,000 but you must be 50 years old and above for the additional allowed contribution amount. The 401k Basic maximum contribution figure is also true for the 403b (used by non-profits and educational institutions). But with the 403b there is also a $40,000 "catch up" provision and a 15-year (same employer) "catch up" provision. These are a bit confusing and are best explained by to the employee by the Third Party Administrator (TPA). In 2009 the entire 403b administration rules changed, too. The basic rules are explained more thoroughly at other sites on the web, but beware of the ever changing nature of these regulations and that postings on the internet are often out-of-date. One site, money-zine, (http://www.money-zine.com/Financial-Planning/Retirement/403b-Contribution-Rules/), which came up on a search on 3-27-09 and it is fairly comprehensive, doesn't include the 401k or 403b Roth after-tax contributions that can now be made or the TPA rules. To get the 'right answer' regarding 403b contribution maximums, please do more than Google searches and reading internet information. The IRS.gov site is helpful and has specific rules, but it really takes a knowledgeable TPA to give the correct information for an individual's specific situation. Per the referenced article another important point to remember regarding your 401k maximum contribution limit - the combined total maximum contribution that you can make each year to ALL 401k plans in which you participate, including standard 401k plans and Roth 401k plans - is the lower of: (1) the maximum percentage contribution limit allowed under each of your employers' plans, or (2) the dollar limits shown in the table above. For example, if your employer's 401k plan allows you to contribute up to a maximum of 10% of your salary, and you earn $50,000, your maximum contribution limit is $5,000, not the $16,500 contribution limit in 2009 that applies only to higher-paid employees
The maximum Roth IRA contribution for married couples in 2022 is 12,000, or 6,000 per individual.
4000 per month
The best I can find on the internet is 900 mg per month.
The maximum contribution limit for an Employee Stock Purchase Plan (ESPP) in 2022 is 22,500 per calendar year.
It can handle 15000 printed pages per month.
500000 lakhs per month
Whatever monies you contribute to 401k you do not pay income tax on now. You pay tax when you withdraw it, after retirement. So you get the benefit of your money growing tax free. For instance if you contribute $100 per month to a 401k that money grows faster than if you contributed after tax where the amount would be say $75 per month. But be aware there are heavy penalties for using that money prior to retirement.
The $5,000 annual IRA contribution limit is per customer. You maximum contribution amount is determined by adding contributions to all of your IRA accounts (both traditional and Roth).