[Frank]

It’s a trivial decision over a couple decades of contributions, because you are forced to limit them by year anyway. And even more irrelevant once your accumulated assets dwarf your annual contributions.

So just do whatever is most convenient for you, which is usually one and done if you have the funds.

[Jen]

Get the money in there as soon as you can.

[Christopher]

Lump sum (all at once) is better on average, but not always. I think it does better about 2/3 of the time.

It’s not really worth being dogmatic about, just invest what you can when you can, focusing on the best tax treatment for your plan and situation.

Useful: Early retirement IRA contribution during income transition: pros & cons?

[Kaj]

If you have the money once ASAP is best.

If you are accumulating the money Dollar cost averaging is best.

The worst is to hoard & dump at the end.

[Ron]

In the U.S., 80% of the years, the mkt is up.

So 80% of the time, if you put $7k in an IRA on Jan 1, it will have the full year to grow. So a $7k deposit on Jan 1 will grow to $7700 by the end of the year, assuming a 10% mkt return for the month.

Alternatively, let’s assume the same situation but you dribble the money in one month at a time. At the end of the year, you will have $7,399.

So, the best path is to contribute any lump sum the day you get it in your hands. Things will work out in your favor 80% of the time.

Suggested: Is there a platform where you can start investing in a Roth IRA without a 3K minimum like Vanguard requires?

[Bill]

You – and most people – should just automate this and contribute each paycheck.

Why? Well, it’s now April and you are asking about a strategy that might have been effective in January! An imperfect strategy you reliably follow through on is better than a perfect one that never gets done.

[Author]

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