KB Kookmin Bank rolled a bundled fee sheet Friday that pairs jeonse deposit guarantee insurance with mortgage rate-lock certificates for renters in Seoul converting to owner-occupier loans, quoting combined premiums in won on one branch handout ahead of autumn lease turnover. The bundle targets households exiting two-year jeonse contracts who need simultaneous protection on returned deposits and locked borrowing costs while apartment sales close.

What the bundle costs

Sooyeon Choi’s statement math: guarantee fees on a 300 million-won jeonse deposit run near 0.13 percent annually under Housing & Urban Guarantee Corp. tables, while a ninety-day mortgage rate lock historically billed 0.05 percent of the loan amount as a separate product. KB’s bundle discounts the pair by 18,000 won when customers open both through its mobile app, according to Friday’s tariff sheet posted in branches from Gangnam to Nowon.

The lock covers standard variable mortgages migrating to fixed hybrids; promotional rates for jeonse-loan conversions are excluded unless borrowers pay an add-on basis-point fee disclosed in footnote three of the handout.

Why now

Seoul jeonse turnover peaks between Chuseok and November moving season. Renters simultaneously apply for guarantee policies on new deposits and hunt purchase loans when landlords sell units—timing mismatches used to mean double branch visits and conflicting rate quotes if the Bank of Korea moved benchmarks mid-process.

KB Kookmin’s retail chief said the bundle reduces “calendar risk,” not credit risk: underwriting standards stay unchanged, and missed mortgage payments still hit credit scores within seven days per FSS rules.

Guarantee mechanics

HUG-backed insurance pays landlords if tenants breach; bundled locks freeze the mortgage offer rate while guarantors process landlord release documents. KB integrated status tracking so customers see guarantee approval and lock expiry on one app screen—a UX tweak with real won impact when moving trucks are booked.

Competing banks offer similar pairs, but KB’s nationwide branch count matters for renters who still need stamped copies for registry offices.

Household pitfalls

Locks expire if purchases slip past ninety days; guarantee policies must be renewed if landlords extend jeonse verbally without registry updates— a common dispute path Interior Ministry ballot pilots aim to address separately. KB’s handout warns that bundle discounts vanish if customers cancel locks after guarantee issuance.

Missed guarantee premium payments do not grace-period like card bills; policies lapse at midnight on due dates, exposing deposits.

Rate outlook

Bank of Korea held policy steady earlier this month, but mortgage spreads widened on funding costs. Rate locks insulate approved borrowers from spread creep; they do not cap appraisal shortfalls if prices dip before closing. Sooyeon Choi notes borrowers should compare bundle savings against standalone products when loan amounts exceed one billion won—footnotes show discounts cap at 40,000 won.

Branch load

KB staffed mortgage desks for Saturday appointments in high-turnover districts. Digital-only customers can upload jeonse contracts via the app, but registry-stamped copies still require in-person checks for some landlord entities.

For households, the bundle is a scheduling product as much as a financial one: one fee sheet, one timeline, fewer nights worrying whether the mortgage offer dies while guarantee paperwork crawls.

Issuer economics

KB books guarantee commissions and lock fees as fee income without expanding risk-weighted assets. Investors treat the product as retention glue ahead of year-end housing loan targets, not a margin revolution—unless autumn turnover exceeds forecasts and bundles pull share from rivals.

Registry timing

Real-estate agents in Seoul said bundled approvals shave two to three business days when jeonse releases and purchase registrations stack in the same week. KB’s mortgage operations center will stay open until 8 p.m. weekdays through October for document checks—a seasonal staffing move Sooyeon Choi’s readers should factor into moving budgets alongside truck rental deposits.

Comparison shopping

Borrowers should still compare standalone HUG policies if landlords demand non-bank guarantors; KB’s bundle does not alter landlord rights in registry disputes. Rate locks also do not cover appraisal fees or moving insurance—line items that often surprise first-time buyers upgrading from jeonse to ownership in the same neighborhood.

Digital signatures

KB expanded e-signature acceptance for jeonse guarantee applications filed through the HUG portal, but mortgage locks still need wet signatures on paper rate-lock certificates when loan amounts exceed 600 million won—a threshold many Gangnam upgraders cross, so branch queues may persist despite the bundle marketing.