# Korea internet full-period cost calculator

> The chosen months change the whole-period sum; unknown amounts must be checked rather than silently treated as zero.

Written by the Korea Home Internet Guide editorial team on October 24, 2026. Canonical address: https://internetpick.site/tools/real-cost.

## Which quote amounts belong in the calculation?

Use the monthly amount for the selected term, one-time installation, separate period rental, gifts, old cancellation and support.

All fields start blank. Enter 0 only after confirming an item does not apply. Check whether the monthly quote already includes equipment rental so that the same charge is not counted twice.

**Units for the selected-period calculation**

| Input | Unit or treatment |
| --- | --- |
| Monthly | KRW per month × selected 12/24/36 months |
| Installation | One-time KRW |
| Separate rental | Total KRW for the selected period, added once |
| Gift/support/old cancellation | Separate entered amounts and conditions |

## How are the before-and-after figures derived?

Before gift equals monthly×months plus installation, rental total and old cancellation, minus support; after gift subtracts the cash gift.

This is the guide’s arithmetic worksheet, not a provider’s statutory cancellation formula. Smartchoice warns that the actual discount return depends on subscription conditions and use period; obtain that amount from the contracting provider.

## What is the denominator of the gift share?

The cash gift is divided by the entered before-gift burden, with numerator and denominator displayed.

If that denominator is zero or negative, the share is unavailable. A negative after-gift balance is kept as arithmetic with a confirmation warning; it is not advertised as profit or guaranteed payment.

## Can the result be read without an external quote?

Yes. Input arithmetic and its limits are shown before the optional external connection.

The official comparison service remains beside the disclosed commercial connection. Opening either link does not validate the inputs or change the calculation. Do not enter contact details into this local form.

Korea Home Internet Guide provides general contract information. Confirm the applicable terms, eligibility and exact amounts with the contracting provider.

## What else do people ask about Full-period cost?

### Does selecting 12 months still calculate 36 months?

No. Both totals and monthly equivalents use the selected 12,24 or 36 months.

### Is rental a monthly input?

No. It is the separate rental total for the selected period, added once.

### What does a negative result mean?

Entered offsets exceed entered costs; it is not guaranteed income.

### Why can the gift ratio be unavailable?

The before-gift denominator is zero or negative.

### Must the quote link be opened?

No. The full calculation is available independently.

## What should you read next?

- [Discount return or internet cancellation fee?](https://internetpick.site/articles/discount-return)
- [Is a bigger internet cash gift a better deal?](https://internetpick.site/articles/cash-gifts)
- [Korea broadband subscriber totals](https://internetpick.site/statistics/broadband-subscribers)
- [Korea internet moving and contract checklist](https://internetpick.site/tools/moving-check)

## Where do these numbers come from?

- [Product discount-return reference](https://www.smartchoice.or.kr/smc/guide/discountRefundProduct.do) - Korea Telecommunications Operators Association · Smartchoice
- [Consumer Dispute Resolution Standards 2025-14, annex 2](https://www.law.go.kr/LSW/admRulInfoP.do?admRulSeq=2100000270136) - Korea Fair Trade Commission
- [Official internet/IPTV plan comparison](https://www.smartchoice.or.kr/smc/plan/planExpantionBillNew2.do) - Korea Telecommunications Operators Association · Smartchoice