Observed arrival · 2026-11-14
Box12TT calculates W-2 overtime code TT
A browser-based calculator turns weekly payroll CSVs into employee-level W-2 box 12 code TT amounts and shows the workweek math.
○Open
⊠Login
$Paid
†Ads
✦Pretty
●Pro
◎Niche
◉Human
⚑Risk
ƒJS
- For
- Payroll staff handling in-house W-2 reporting
- Worth noticing
- It calculates the overtime premium rather than the full overtime line; bonuses and shift differentials can raise the regular rate.
Field notes
The calculation examples distinguish the overtime premium from the full overtime line: the page says the premium is one-third of time-and-a-half pay, or one-quarter of double-time pay. Daily overtime and overtime on PTO are shown as excluded, while bonuses and shift differentials can change the regular rate. The free tier covers three employees per file; the paid season pass adds unlimited employees and clients, W-2-entry amounts, and a printable audit trail.
Observed signals
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Editorial observations of this landing page, not a rating.
○OpenPublic substance visible
$PaidCommerce or pricing visible
✦PrettyNotable craft visible
●ProPolished or operationally mature
◎NicheUnusually specific use
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