A

Bull Market Tax Scenario Planner

3.95

Derivation Chain

Step 1 KOSPI breaking 6000 in a bull market
→
Step 2 Mass profit-taking by individual investors
→
Step 3 Capital gains tax and comprehensive financial income tax scenario planning

Problem

During KOSPI bull markets, individual investors realizing gains of tens of thousands of dollars fail to accurately assess thresholds for comprehensive financial income taxation (triggered above ~$15,000 USD) and major shareholder capital gains tax, resulting in unexpected tax bills (additional 6–15 percentage points) at year-end. In years like this with +40% market surges, the number of investors whose combined dividends and trading profits exceed these thresholds spikes—yet no brokerage mobile app offers tax simulation features.

Solution

(1) Enter holdings and realized gains for the year to instantly determine comprehensive financial income tax liability; (2) compare after-tax returns across sell scenarios such as 'sell additional shares before December' vs. 'defer to next year'; and (3) track in real time how close combined dividend and interest income is to the comprehensive taxation threshold.

Target: Salaried individual investors aged 30–50 with annual financial income between $7,500–$37,500 USD
Revenue Model: Premium SaaS at $14 USD/month per account (unlimited scenario simulations). Free tier: 3 simulations per year.
Ecosystem Role: Regulation
MVP Estimate: 2_weeks

NUMR-V Scores

N Novelty
3.0/5
U Urgency
4.0/5
M Market
4.0/5
R Realizability
5.0/5
V Validation
3.0/5
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.
SaaS N=.15 U=.20 M=.15 R=.30 V=.20 Senior N=.25 U=.25 M=.05 R=.30 V=.15

Feasibility (72%)

Tech Complexity
29.3/40
Data Availability
23.1/25
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 (56/100)

Competition
8.0/20
Market Demand
6.2/20
Timing
14.0/20
Revenue Signals
10.5/15
Pick-Axe Fit
10.5/15
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

Backend [medium] Frontend [medium] Data Pipeline [low]
Dashboard