Where Tax Advisory Call Automation Should Stop
Korea's public tax helpline data shows 93.5% of consultations arrive by phone. The category most welded to the phone is not the hard tax law question but the easiest-looking one: how to use the filing portal. Here is a three-tier model that draws the line by consequence, not difficulty.
Anyone who has staffed a tax helpline knows January and May are the hard months. What most teams carry is a rough feeling about it, not a figure.
The figure exists. Korea's National Tax Service publishes consultation volumes for its national tax helpline through the public data portal (as of 31 December 2024). Across 2024 the centre handled 4,086,982 consultations. January took 14.5% of the year, May 13.4%. The quietest month, September, took 5.6%.
This piece works through where the automation line should sit. The short version: it does not fall where the questions get hard.
1. The Peaks Are Already on the Calendar
Demand for tax advice is not a hard forecasting problem. Two statutory deadlines — year-end settlement and the May income tax filing — convert directly into call volume.
NTS helpline, share of annual consultations (2024, base 4,086,982)
Jan 14.5% year-end settlement
May 13.4% income tax filing
Sep 5.6% annual low
peak month / trough month ≈ 2.6x
The same team absorbs 2.6 times more in one month than another. Staff to the trough and calls back up in filing season; staff to the peak and people idle for ten months. The swing arrives with notice — filing dates are published in January — so what runs short is absorption, not foresight.
2. Almost All of It Arrives by Phone
An online consultation channel has been open for years, and the split has barely moved.
| Channel | Volume | Share |
|---|---|---|
| Phone | 3,819,842 | 93.5% |
| Online | 267,140 | 6.5% |
| Total | 4,086,982 | 100% |
More than nine in ten come by phone. The usual reading is that callers dislike digital channels; the next section does not support it.
One qualification matters. The 93.5% counts only what reached the helpline, so it does not prove a preference for phones. It shows something narrower and more useful — the questions that survive self-service end up on a phone line.
