National Pension Voluntary Continued Enrollment Calculator

4.05

Derivation Chain

Step 1 Increasing interest in retirement preparation among 50s

→

Step 2 Difficulty in deciding whether to voluntarily continue National Pension after retirement

Problem

A worker who retired at age 54 must decide whether to voluntarily continue National Pension enrollment until age 60. It's complex to calculate how long they need to live to break even on the monthly premiums versus the increased pension benefits starting at age 65. National Pension Service consultations have a 2-3 week wait, and online calculators don't support voluntary continued enrollment scenarios. A wrong decision can result in opportunity costs of tens of millions of won.

Solution

By inputting current age, retirement date, past contribution period, and expected payment amount, the tool automatically compares two scenarios—'voluntary continued enrollment vs. non-enrollment'—in terms of monthly benefit, total benefit, and break-even age. It also reflects spouse survivor pension scenarios and basic pension reduction impacts to suggest an optimal strategy for 'our couple's situation.'

Target: Workers aged 52-59 who have retired or plan to retire within 2 years, and dual-income couples where both spouses have National Pension contribution history.

Revenue Model: Basic comparison (single scenario) is free. Couple integrated scenario + basic pension linkage + PDF report: 5,000 KRW per report (approx. $3.75). B2B API for tax accountants and financial planners: 30,000 KRW/month (approx. $22.50).

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

4.0/5

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 (65%)

Tech Complexity

24.0/40

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 (66/100)

Competition

8.0/20

Market Demand

9.4/20

Timing

20.0/20

Revenue Signals

10.5/15

Pick-Axe Fit

10.5/15

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

Frontend [medium] Backend [medium]

Dashboard