The 2018 Roth IRA limits will not change again this year.
However, the Roth 401k contribution limits will increase by $500. It’s time to start planning your contributions.
The 401k limits and IRA limits are determined based on inflation, but can only increase in $500 increments.
The 2018 social security wage base  increased by $1,500.
Roth IRA and Roth 401k Limits
The 2018 limits will stay the same for the traditional IRA. Limits for the traditional 401k will increase. In addition, the increased limits also apply to 403b plans and most 457 plans.
2017 & 2018 Contribution Limits
Here are the official contribution limits from the IRS :
|Roth 401k Contributions||2017||2018|
|Maximum||$ 18,000||$ 18,500|
|Catch-up 50 and over||$ 6,000||$ 6,000|
|Roth IRA Contributions||2017||2018|
|Maximum||$ 5,500||$ 5,500|
|Catch-up 50 and over||$ 1,000||$ 1,000|
You can make your 2018 contributions as early as January 1, 2018 for the whole year. If you contribute 2018 Roth IRA money between January 1 and April 17, be sure to designate the calendar year 2018 if you have already contributed the maximum for 2017.
Since the 2018 limits will stay the same for the Roth IRA, if you use automatic investments, you probably won’t have to make any changes. You should contact your HR department to make changes to your Roth 401k deferral rate for 2018 if you want to take advantage of the increase.
To maximize your IRA investments, make sure you aren’t paying extra fees in your IRA. You can transfer your IRA to another broker to avoid annual fees. We use Vanguard for our IRAs.
Roth IRA Income Limits
The income limits for Roth contributions in 2018 went up slightly. You may contribute the full amount to your Roth IRA if your 2018 modified adjusted gross income  is below $120,000 for singles ($189,000 for married). You may make partial contributions until your income hits $135,000 ($199,000 for married).
If your income is above that, you cannot contribute to a Roth IRA. If you are interested, there is a workaround called the Backdoor Roth IRA  if your income is above the limits.
2017 Contribution Deadlines
The deadline for 2017 IRA contributions is April 17, 2018, the same as the tax deadline .
401k contribution deadlines are based on the calendar year. 2017 401k contributions are due at the end of the year.
More Helpful Roth Topics
- To Roth 401k or Not to Roth 401k? 
- Can You Have a Roth 401k and a Roth IRA at the Same Time? 
- 11 Unusual Roth IRA Strategies 
- How to Make Early Roth IRA Withdrawals 
- Should You Use a Roth IRA as an Emergency Fund? 
- What is a Backdoor Roth IRA? 
- Open a Roth IRA for your Teen