B

Couple's Inheritance Tax Pre-Simulator

3.05

Derivation Chain

Step 1 Bitcoin crash/increased asset volatility
→
Step 2 Portfolio reassessment for those in their 50s
→
Step 3 Integrated inheritance tax pre-calculation for real estate + financial assets + virtual assets

Problem

For couples aged 55-60 with one apartment (worth 500M-1B KRW, approx. $375K-$750K), retirement pension (100M-300M KRW, approx. $75K-$225K), financial assets (100M-200M KRW, approx. $75K-$150K), and Bitcoin (a few million to tens of millions KRW, approx. $750-$7,500), calculating expected inheritance tax requires a tax accountant consultation (300K-500K KRW, approx. $225-$375). However, before the consultation, they can't even grasp the 'rough scale,' which only increases anxiety. Especially with the implementation of virtual asset taxation from 2025, inheritance tax calculations including Bitcoin have become more complex, and depending on how you combine various deductions such as spousal deduction, lump-sum deduction, and financial property deduction, the tax amount can differ by tens of millions of KRW (approx. $7,500+).

Solution

By entering the market value of real estate (automatic lookup of official price), financial assets, retirement pension, and virtual asset valuation, it calculates the expected inheritance tax based on current inheritance tax law, automatically applying spousal deduction, lump-sum deduction, and financial property deduction. It shows a comparison table of tax differences between 'spouse first vs. self first' scenarios and the tax-saving effect of pre-gifting, to be used for pre-learning before a tax accountant consultation.

Target: Couples aged 55-62, owning one apartment and financial assets of at least 100M KRW (approx. $75K), with two children, who have not yet started inheritance planning.
Revenue Model: Basic simulation free, detailed scenario comparison report PDF 9,900 KRW (approx. $7.50). Commission from partner tax accountant consultations.
Ecosystem Role: Education
MVP Estimate: 2_weeks

NUMR-V Scores

N Novelty
2.0/5
U Urgency
4.0/5
M Market
4.0/5
R Realizability
3.0/5
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.
N=.15 U=.20 M=.15 R=.30 V=.20

Feasibility (70%)

Tech Complexity
29.3/40
Data Availability
20.8/25
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

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