There are two separate bills pending in Congress that aim to raise the current limits for catch-up contributions. First, there's a House bill that would allow savers aged 62, 63, or 64 to make catch-up contributions totaling up to $10,000 for a 401(k), up from $6,500.
That said, that bill would also eliminate the pre-tax aspect of those contributions, effectively bumping them into the Roth category. That's not a bad thing, though, because that money would still benefit from tax-free growth and withdrawals.