Landlord Tax & Obligation Change Alerts

3.55

Derivation Chain

Step 1 Public data migration to private clouds gains momentum

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Step 2 Digitalization of real estate tax and regulatory data

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Step 3 Customized alerts for tax and lease law changes that small landlords in their 50s miss

Problem

The number of small-scale landlords in their late 50s who retire and rent out 2-3 studio apartments is rapidly increasing. However, rental income tax thresholds, changes to the three major rental housing laws, mandatory jeonse/monthly rent reporting, and comprehensive real estate tax criteria change every year, and missing them can result in surcharges (up to 20%). Consulting a tax accountant annually costs 500,000 to 1,000,000 KRW (approx. $375–$750), and even when checking directly on the National Tax Service's HomeTax, it's hard to find what has changed. In particular, small landlords with two or fewer properties often don't have a tax representative and are completely unaware of changes.

Solution

(1) Register property types, number, and location to receive filtered alerts only for tax law and regulatory changes affecting those conditions, (2) translate changes into 'how much my taxes increase or decrease in my situation,' (3) provide D-30/D-7 reminders for filing deadlines plus direct links to the HomeTax filing screen. It automatically monitors the Ministry of Justice's National Law Information Center and National Tax Service notices.

Target: Landlords aged 50-65 with 1-3 studio apartments or officetels, who file taxes themselves without a tax accountant, and households where rental income is the primary source after retirement.

Revenue Model: Basic alert service (2-3 major changes per year) is free; customized tax impact simulation + filing guide for 4,900 KRW per month (approx. $3.70); per-transaction fee for connecting with a tax accountant for 1:1 consultation.

Ecosystem Role: Regulation

MVP Estimate: 2_weeks

NUMR-V Scores

N Novelty

3.0/5

U Urgency

4.0/5

M Market

3.0/5

R Realizability

4.0/5

V Validation

3.0/5

NUMR-V Scoring System

N Novelty	1-5	How uncommon the service is in market context.
U Urgency	1-5	How urgently users need this problem solved now.
M Market	1-5	Market size and growth potential from proxy indicators.
R Realizability	1-5	Buildability for a small team with realistic constraints.
V Validation	1-5	Validation signal quality from competition and demand data.

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	/ 40	Difficulty of core implementation stack.
Data Availability	/ 25	Practical availability and cost of required data.
MVP Timeline	/ 20	Expected time to ship a usable MVP.
API Bonus	/ 15	Bonus for viable public API leverage.

Market Validation (61/100)

Competition

8.0/20

Market Demand

6.2/20

Timing

16.0/20

Revenue Signals

10.5/15

Pick-Axe Fit

12.0/15

Solo Buildability

8.0/10

Validation Breakdown

Competition	/ 20	Signal quality from competitor landscape.
Market Demand	/ 20	Demand proxies from search and mention patterns.
Timing	/ 20	Fit with current shifts in tech, behavior, and regulation.
Revenue Signals	/ 15	Reference evidence for monetization viability.
Pick-Axe Fit	/ 15	How well the concept serves participants in a trend.
Solo Buildability	/ 10	Practicality for lean-team implementation.

Technical Requirements

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

Dashboard