Too-Big-To-Fail Proposal in Consultation: What the New Rules Mean for the Mortgage Market

On August 12, 2026, the Federal Council launched the consultation on the revised Too-Big-To-Fail regulation (TBTF). The proposal addresses the last major lessons from the emergency takeover of Credit Suisse by UBS in March 2023 and marks the second major wave of regulation for systemically important banks within a few months. Only in mid-August did hypothek.ch Impact of the FINMA tightening under Basel III examined. The TBTF proposal heads in a different direction, but ultimately targets the same recipient: the major bank UBS and, through it, a part of the Swiss mortgage market.

The consultation runs until November 19, 2026, with parliamentary deliberation planned for 2027. Most of the measures are scheduled to take effect at the beginning of 2029, while some liquidity rules will apply only from 2033. For mortgage borrowers who take out a fixed-rate mortgage with a five or ten-year term today, these timelines directly overlap with their own loan term.

Three Strategic Directions Shape the Reform

The proposal is based on three pillars. First, a new accountability regime modeled after the UK Senior Managers Regime. Large banks with 250 or more full-time positions will in future have to document which executive is specifically responsible for key decisions. The aim is to prevent individual managers from hiding behind collective bodies in the event of a crisis. In addition, variable compensation will be tied to longer retention periods and clawback clauses.

Second, FINMA will get expanded powers. It may impose fines of up to ten percent of annual turnover, apply coercive fines, and publish supervisory proceedings after their conclusion. It is also to be able to intervene earlier when risks become apparent. For practical purposes, it is especially relevant that these fines are linked to turnover, no longer to lump sums. For an institution the size of UBS, the potential fine range is thus in the billions.

Third, liquidity requirements for systemically important banks will be tightened and procedural access to liquidity from the Swiss National Bank will be made easier. Collateral should in future be more easily transferable to the SNB in order to gain time in a crisis. For the smallest institutions in categories 4 and 5, some relief is envisaged; the core measures are aimed at the big bank and large cantonal banks.

Nine Billion in Additional Equity for UBS

As early as June 2025, the Federal Council passed a separate proposal on the full capital backing of UBS foreign subsidiaries, which is reflected in the current TBTF reform. This rule requires UBS to fully back its key foreign subsidiaries with core equity. According to the bank’s estimates, this means an additional capital requirement of around nine billion US dollars, as well as ongoing extra costs of 300 to 500 million francs per year.

UBS publicly describes the requirement as too strict and warns of international competitive disadvantages. The Swiss National Bank and FINMA, on the other hand, explicitly welcome the reform course. From the supervisors’ perspective, fully capitalizing the foreign subsidiaries is the only dependable answer to the problem that the operational management of a globally active institution in a crisis cannot be confined to the parent company in Zurich.

How Regulation Filters into Mortgage Prices

The crucial question for the mortgage market is how UBS’s additional capital costs are passed on to customers. The mechanism is already known from the Basel III roll-out. When a bank has to set aside more capital for a particular loan, the internal cost of capital rises—that is, the return expected on a loan. For a residential mortgage with 80 percent loan-to-value and a gross margin of about 60 basis points, the effect typically amounts to 5 to 15 basis points, distributed across new business and renewals.

However, competition limits the scope. The Swiss mortgage market is by no means dominated solely by UBS. Cantonal banks, Raiffeisen, pension funds and insurers together hold significantly larger market shares than the big bank. For borrowers, this means that a margin increase by UBS or key4 can be fully or partly offset by switching to a cantonal or institutional lender.

What the Proposal Does Not Change

It’s important to note what the TBTF proposal is not. It does not introduce new loan-to-value limits and does not modify either the affordability calculation or the repayment requirement to two thirds of the property value within fifteen years. The strict rules for private mortgage borrowers derive from the self-regulation of the Swiss Bankers Association and separate FINMA circulars. These were only updated in 2025 under Basel III, and there is no further need for change in the current consultation package.

The logic of refinancing via mortgage bonds and the capital market also remains unchanged. The yields of ten-year government bonds continue to set the price basis for fixed-rate mortgages, regardless of which bank sets the terms. The TBTF reform changes the margin, not the market price of refinancing.

Comparison with Basel III Tightening

For better context, a comparison with the recent Basel III implementation is useful. Basel III and FINMA Circular 02/2025 act directly on the risk weighting of individual loans. As a result, they affect all banks across the board and have a direct impact on lending to self-employed, landlords, and first-time buyers with high loan-to-value ratios. In contrast, the TBTF proposal addresses the system level. It does not target specific loan segments, but the institutional stability of the large bank.

For mortgage borrowers this means: Those financing a complex scenario will feel Basel III much more strongly than the new TBTF proposal. Those financing a standard apartment or single-family home will notice only minor price shifts at most, but will benefit from a more stable banking system as a framework.

Outlook for the Consultation

The discussion over the next three months will focus on three contentious issues. First, whether the nine billion in extra core capital is truly proportionate. Second, the design of the Senior Managers Regime, in particular the scope of personal liability. Third, the new FINMA fine authority and its rule-of-law safeguards.

Politically, the proposal is likely to find broad approval, as trust in self-regulation has been damaged since the CS takeover. However, the final details of the capital requirements will only be settled during parliamentary deliberations. For the mortgage market, the main message is: the framework will become stricter, but actual terms for individual borrowers will stay within the usual ranges. Anyone facing a renewal in 2027 or 2028 should obtain offers from a wider range of providers than before.

Sources: EFD press release dated August 12, 2026, Finews analysis on TBTF proposal