MODELDRIFT.WATCH

Question 49 · Oct 2 · Day 23

Claude on Question 49, Oct 2

What's the 2025 Roth IRA contribution limit if I'm 50, and what's the income phase-out range for a single filer?

2025 Roth IRA Contribution Limit (Age 50)

$8,000 total — that's the $7,000 standard limit plus the $1,000 catch-up contribution for those age 50 or older.

A couple of caveats:

  • •This is the combined limit across all your traditional and Roth IRAs — not $8,000 each.
  • •You can't contribute more than your taxable compensation for the year (earned income, not investment income). Spousal IRAs are an exception if you file jointly.
  • •The deadline for 2025 contributions is April 15, 2026.

Income Phase-Out for Single Filers (2025)

Based on modified adjusted gross income (MAGI):

MAGIWhat you can contribute
Under $150,000Full $8,000
$150,000 – $164,999Reduced amount
$165,000 and up$0 directly

For reference, married filing jointly phases out from $236,000 to $246,000, and married filing separately (if you lived with your spouse) is a tight $0 to $10,000.

How the Reduction Works

Within the phase-out range, you multiply your contribution limit by the fraction of the range you have left. For example, at a MAGI of $157,500 (halfway through the $15,000 range), you'd be able to contribute roughly $4,000. The IRS lets you round up to the nearest $10, and if the formula produces anything above $0 but under $200, you may still contribute $200.

If You're Over the Limit

Being phased out of direct contributions doesn't necessarily close the door — a "backdoor Roth" (contributing to a traditional IRA, then converting) is a common workaround. Just be aware of the pro-rata rule: if you hold pre-tax money in any traditional, SEP, or SIMPLE IRA, the conversion becomes partly taxable, which can make this strategy messier than it first appears.

Worth confirming the details with a tax professional before executing a backdoor conversion, since the pro-rata math depends on your specific IRA balances as of December 31.

sha256 77f01eac82f0… · 47 tokens in · 1,178 out · 14.1 s · via Claude Platform on AWS · stopped on its own

Oct 2, the whole dayQuestion 49, every day

Exact recordShowHideThe model id, the run, the verbatim text with line numbers and its full sha256
Model
anthropic/claude-opus-5
pinned anthropic/claude-opus-5-20260723; alias resolved to anthropic/claude-opus-5-20260723 at 2026-10-02 09:00:07 UTC (matches the pin)
Date
2026-10-02 · run 20261002T090008Z-e178a0 · scorer v1
Scored
answered · correct
sha256
77f01eac82f0e8351031c9799c2764eec1c1fc29c613e339928ed5b3df0bbc92
Permalink
https://modeldrift.watch/r/2026-10-02/H36/anthropic/claude-opus-5/
Scored
answered · correct
Received
2026-10-02 09:43:51 UTC
Run
20261002T090008Z-e178a0
Served by
Claude Platform on AWS · HTTP 200 · finish stop
Size
1,902 characters · 1,178 tokens out incl. hidden reasoning · 14.1 s

Highlighted: the required figures found (3 of 3).

## 2025 Roth IRA Contribution Limit (Age 50)
**$8,000 total** — that's the $7,000 standard limit plus the $1,000 catch-up contribution for those age 50 or older.
A couple of caveats:
- This is the **combined** limit across all your traditional and Roth IRAs — not $8,000 each.
- You can't contribute more than your taxable compensation for the year (earned income, not investment income). Spousal IRAs are an exception if you file jointly.
- The deadline for 2025 contributions is **April 15, 2026**.
## Income Phase-Out for Single Filers (2025)
Based on modified adjusted gross income (MAGI):
| MAGI | What you can contribute |
|---|---|
| Under $150,000 | Full $8,000 |
| $150,000 – $164,999 | Reduced amount |
| $165,000 and up | $0 directly |
For reference, married filing jointly phases out from **$236,000 to $246,000**, and married filing separately (if you lived with your spouse) is a tight **$0 to $10,000**.
## How the Reduction Works
Within the phase-out range, you multiply your contribution limit by the fraction of the range you have left. For example, at a MAGI of $157,500 (halfway through the $15,000 range), you'd be able to contribute roughly $4,000. The IRS lets you round up to the nearest $10, and if the formula produces anything above $0 but under $200, you may still contribute $200.
## If You're Over the Limit
Being phased out of *direct* contributions doesn't necessarily close the door — a "backdoor Roth" (contributing to a traditional IRA, then converting) is a common workaround. Just be aware of the **pro-rata rule**: if you hold pre-tax money in any traditional, SEP, or SIMPLE IRA, the conversion becomes partly taxable, which can make this strategy messier than it first appears.
Worth confirming the details with a tax professional before executing a backdoor conversion, since the pro-rata math depends on your specific IRA balances as of December 31.

End of response · 30 lines · 1,902 characters · sha256 77f01eac82f0e8351031c9799c2764eec1c1fc29c613e339928ed5b3df0bbc92