Thinking of earning extra income on platforms like SamSam M2 but feeling nervous?

You want steady side income from short-term rentals, but starting brings worries.

“Will I lose dependent status on my employer’s health plan?”

“What if my health insurance premiums go up and I end up worse off?”

Rental income can affect your health insurance.
Today we’ll explain how premium changes are determined and show a simple way to calculate income so you keep your net earnings.

Why does short-term rental income affect health insurance?

If you’re a dependent, check the income rules first

If you’re registered as a dependent on an employee’s plan, confirming the income threshold is crucial.
If rental income from short-term stays exceeds a set threshold, you can lose dependent status and switch to a regional enrollee, which may raise your premiums.
The exact income threshold can change yearly, so the most accurate step is to check the current standard with the National Health Insurance Service (1577-1000).

If you’re already a regional enrollee, premiums are reassessed every November

If you’re a regional enrollee, new short-term rental income is reflected when premiums are recalculated each November based on that year’s income and assets.
If your income goes up compared to the previous year, your monthly payment may rise.
Whether you register as a rental business and the business type (general vs. simplified) can change how rules apply, so it’s safer to check before registering.

Source: National Health Insurance Service official guidance (2026)

Complex income math — there’s an easier option to protect net earnings

To check health insurance rules you first need to know “how much rental income I actually earn.”
Fees like platform commissions and cleaning costs make that calculation tricky.

Source: SamSam M2 & plott LIFE official sites (2026)

Will small short-term rental income still raise my health insurance premiums?

It depends on income size, business registration, and your current insurance status.
If you only rent a room occasionally for around ₩300,000/week, the expected annual rental income may be small and have little impact.
Rather than worry, calculate your expected annual income first and compare it to the National Health Insurance Service thresholds.

FAQ — short-term rental & health insurance

Q. Does registering as a rental business always help keep health insurance dependent status?

A. No. Whether it helps depends on business type and current income.
Because it varies, check your situation with a tax advisor or the National Health Insurance Service before registering.

Q. If I’m worried about premiums rising, should I avoid short-term rentals?

A. The impact may be small depending on your income and current status.
We recommend estimating expected rental income and comparing it with National Health Insurance Service rules before deciding.

Q. Is income reporting easier if I operate through plott LIFE?

A. Yes—since the platform fee is ₩0 (current), there are fewer items to deduct, making it easier to assess rental income.
But note this only simplifies calculation; tax filing and checking health insurance obligations still apply as usual.

This article is for general information and does not replace advice from a tax advisor or the National Health Insurance Service.

List the same property on plott LIFE as you did on SamSam M2

With a ₩0 fee (current) your income math gets simpler.
Always check possible premium changes before you start and reduce factors that complicate calculations.

plott LIFE — ₩0 fee short-term rental host platform

₩0 fee (current) · Easy contracts · Platform support for damage claims · No listing fee