A

Health Insurance Premium Spike Prevention Calendar

4.25

Derivation Chain

Step 1 Clarity Act — virtual asset income taxation becomes a reality
→
Step 2 Risk of losing dependent status under health insurance as investment income increases
→
Step 3 Need to predict the point when monthly premiums surge 3-5 times upon loss of dependent status and conversion to regional health insurance

Problem

When early retirees around age 55 or their spouses are registered as dependents under their children's workplace health insurance, if financial income (interest, dividends, virtual asset gains) exceeds KRW 20,000,000 (approx. $15,000) per year, dependent status is revoked and they are forcibly converted to regional health insurance. This causes monthly premiums to surge from under KRW 100,000 (approx. $75) to KRW 400,000-800,000 (approx. $300-$600). Due to the time lag between income generation and dependent status assessment, they are notified suddenly. With the implementation of virtual asset taxation (2026), the number of people in their 50s facing this issue is expected to surge, but there is no tool to track in real time how close their total financial income is to the threshold.

Solution

When users enter their expected annual financial income (interest, dividends, virtual asset capital gains, rental income) by category on the web, the service (1) displays in real time the remaining amount before losing dependent status, (2) provides a monthly income calendar that warns 'if you sell at this point, you exceed the threshold,' and (3) simulates the expected monthly health insurance premium if status is lost. It also compares timing adjustment scenarios such as 'how much you save by postponing the sale to next year.'

Target: Individuals aged 50-62 who are or will become dependents under their children's workplace health insurance after retirement, and who hold total financial assets (deposits, stocks, virtual assets) of KRW 100,000,000 (approx. $75,000) or more.
Revenue Model: Basic dependent status assessment simulation is free. The monthly income tracking calendar plus timing optimization scenario comparison costs KRW 14,900 (approx. $11.18) per year. Premium tax accountant connection (per-transaction fee).
Ecosystem Role: Regulation
MVP Estimate: 2_weeks

NUMR-V Scores

N Novelty
4.0/5
U Urgency
5.0/5
M Market
4.0/5
R Realizability
4.0/5
V Validation
4.0/5
NUMR-V Scoring System
N Novelty1-5How uncommon the service is in market context.
U Urgency1-5How urgently users need this problem solved now.
M Market1-5Market size and growth potential from proxy indicators.
R Realizability1-5Buildability for a small team with realistic constraints.
V Validation1-5Validation signal quality from competition and demand data.
Each dimension is scored 1-5 and weighted into grade S/A/B/C/D.
N=.15 U=.20 M=.15 R=.30 V=.20

Feasibility (62%)

Tech Complexity
24.0/40
Data Availability
18.3/25
MVP Timeline
20.0/20
API Bonus
0.0/15
Feasibility Breakdown
Tech Complexity/ 40Difficulty of core implementation stack.
Data Availability/ 25Practical availability and cost of required data.
MVP Timeline/ 20Expected time to ship a usable MVP.
API Bonus/ 15Bonus for viable public API leverage.
Total 100 points; below 50% is filtered out.

Market Validation (67/100)

Competition
8.0/20
Market Demand
6.2/20
Timing
20.0/20
Revenue Signals
10.5/15
Pick-Axe Fit
15.0/15
Solo Buildability
7.0/10
Validation Breakdown
Competition/ 20Signal quality from competitor landscape.
Market Demand/ 20Demand proxies from search and mention patterns.
Timing/ 20Fit with current shifts in tech, behavior, and regulation.
Revenue Signals/ 15Reference evidence for monetization viability.
Pick-Axe Fit/ 15How well the concept serves participants in a trend.
Solo Buildability/ 10Practicality for lean-team implementation.
Total 100 points; below 50 is filtered out.

Technical Requirements

Frontend [medium] Backend [medium]
Dashboard