Korean Patent Annuity Fees: Costs, Payment, Discounts, and Recovery

A granted Korean patent is not 'set and forget'. To keep the right alive, you must pay an annuity every year — and a single missed deadline can extinguish it. The Korean patent term is 20 years from filing, but the only way to ride that out is to keep the annual payment cycle running without skipping a beat.

This guide is a practitioner's tour of Korean patent annuities: the fee structure, the normal and grace periods, the bulk-payment discount, individual and SME reductions, and the recovery path when a deadline slips. At the end, we touch on how iphere's annuity workflow automates the moving parts.

Two Periods — Years 1-3 and Year 4 Onward

The Korean annuity is split in two. Years 1-3 are paid in a single lump at the time of registration, so they do not surface separately year by year. The recurring annuity work begins from year 4 onward. The default deadline is 'before the start of each year, measured from the registration date,' and you can pay several years ahead in one go source.

Official fees scale with the number of claims and step up at year boundaries. Individual and SME reductions cut year-4-onward fees by 50%, which is a substantial running-cost difference over a typical patent life.

Normal Period vs. Grace Period — Stepped Surcharges

Missing the normal deadline triggers a six-month grace period. Pay within that window and the right stays alive, but a stepped surcharge applies based on how much time has passed source. The rates are stepped, not cumulative — being four months late means a 12% surcharge, not 12% on top of the earlier brackets.

Recovery After Lapse

Even after the grace period closes, the patentee can apply to recover the right by proving the missed payment was due to justified cause. Acceptable supporting documents tend to be hospitalisation records, natural disasters, or system outages — not internal management failures. This path is the last safety net, and the practitioner's job is to design the workflow so cases never reach it.

10% Bulk Discount — Three Years or More From Year 4

When you bulk-pay three or more years' worth of annuities from year 4 onward, before the normal deadline lapses, KIPO discounts the total by 10%. If you have the cash and the conviction to maintain the right, bulk paying is cheaper per year and lighter on calendar overhead. Already-paid annuities are not refundable if you later abandon, so the call should weigh commercial certainty as well as fee savings.

Individual and SME Reductions

Korea runs a fee-reduction programme for individuals, SMEs, and certain mid-sized firms. Filing-stage cuts are deeper, but year-4-onward annuities still get a flat 50% reduction in the standard track.

Eligibility is judged at the patentee level. Co-owned rights are pro-rated by share. If the patentee is the inventor in person, a 50% reduction is auto-applied; university tech-transfer offices ('Industry-Academic Cooperation Foundations') also get 50% under a separate auto rule. Reduction categories and supporting evidence vary, so a system that checks eligibility every year is the safer baseline.

Run It All on iphere Annuity

iphere's annuity feature pulls bibliographic data from KIPRIS — registration date, inventors, patentees, claim count — and applies patentee-level reduction logic (50% individual auto when patentee equals inventor, 50% Industry-Academic auto, manual SME / mid-sized / other). Users register the matter and choose a bulk range; the system computes per-year amounts. Four reminders are auto-scheduled on payment to land in mail and in-app well before each due date.

Each matter's detail page shows an at-a-glance schedule with the post-reduction unit price per year. Selecting a bulk range highlights those rows and inserts an inline summary at the bottom — per-year subtotal, 3+ year 10% discount, and discounted total. Checkout is one click, and receipts and payment evidence are stored automatically.

Frequently Asked Questions

Q1. Does one missed payment kill the patent?

No — six months of grace are available with a stepped surcharge (3-18%). Pay inside that window and the right is intact. But the grace is the last automatic safety net; missing it means the right lapses and recovery requires proving justified cause. Treat the six months as an emergency buffer, not as routine slack.

Q2. We're unsure about commercialisation — does a 5-year bulk payment make sense?

Probably not. Already-paid annuities are non-refundable, so bulk paying for an uncertain matter ties up cash that you cannot recover if you later abandon. The common rule is to bundle only matters with clear 1-2 year commercialisation; everything else stays year-by-year. The 10% discount is real, but flexibility usually outweighs it for unproven assets.

Q3. Our employees invent and the company holds the patent — does the 50% individual auto-discount apply?

No. The 50% individual auto-discount applies only when the patentee is the inventor in person (or to the share owned that way). When the company succeeds to the rights and registers in its own name, you apply for company-level SME or mid-sized reductions instead. Job-invention top firms or IP-management certified mid-sized companies can get 50% off years 4-9 separately, so check certification status in advance.

Q4. Can foreign applicants use the Korean reductions?

Generally no. The reduction programme targets Korean residents and Korean SMEs. Foreign applicants pay the standard fees unless rights are held through a Korean subsidiary or other domestic structure. For inbound work, the practical levers are bulk-discount planning and automated deadline management rather than fee reductions.