why the 10k limit on I-bonds? How long has that been in place?

[mistymoney]

Any chance they will raise it soon?

do you have to overpay taxes to get the bonus 5k when filing?

[seattlecyclone]

Why the limit? These bonds are aimed at individual investors with relatively small sums to invest. The Treasury offers a wide range of other securities to people and organizations with deeper pockets.

Any chance they will raise it soon?

Chance? Sure. The last time the limit changed was in 2012, so maybe not a great bet that it would happen again soon.

do you have to overpay taxes to get the bonus 5k when filing?

I think so.

[terran]

I think there's always been a $10k limit on I Bonds. Supposedly businesses and trusts can also buy up to $10k: https://thefinancebuff.com/how-to-buy-i-bonds.html

[yachi]

I read on another forum that the limit is 10K per social security number, per year, so if you have dependents, you can buy in their name too.

[Arbitrage]

I bonds are non-marketable securities, with features that make them superior (in many cases) to comparable marketable securities, that are offered to US citizens to encourage saving in the general populace.  They're not intended as a path to riches for the super-savers or wealthy, and $10k per year is sufficient for the vast majority of citizens.  Increasing the limits so that rich people could find another avenue to defer taxes is probably a hard sell.