A finance and accounting concept defining a method, measure, or process used to record activity and support financial decisions. It specifies how value, risk, or performance is measured or controlled through standardized rules and routines. It does not ensure correctness without reliable inputs, appropriate assumptions, and effective review and controls. It materially affects decisions and compliance by shaping how organizations allocate capital, report results, and manage exposure. The concept is generally stable, though standards, regulation, and tools evolve over time.

Principle

Leverage the retail and wholesale deposit base as a source of funding that can be granular and lower-cost relative to market borrowing, while managing concentration, tenor, and liquidity risk inherent to deposits.

Demonstration

A bank funds a $50 billion loan portfolio with $35 billion in retail deposits (current and savings accounts) and $15 billion in wholesale term deposits; managers track deposit betas, stickiness and expected outflows to set liquidity buffers.

Misapplication

Treating deposits as 'free' funding and failing to price their opportunity cost, beta to market rates, or potential sudden withdrawals during stress, leading to underestimation of funding cost and liquidity risk.

Consequence

Well-managed deposit funding lowers overall funding costs, supports credit growth, and improves NSFR and LCR profiles when deposit stability and diversification are preserved.

Reversal

The opposite funding approach would rely primarily on wholesale or market funding (interbank, commercial paper, bonds), which may be cheaper at times but increases rollover and liquidity risk.

Boundary

Covers customer-sourced deposit instruments but excludes central bank liquidity facilities, subordinated debt, equity, and certain secured wholesale funding; stability characteristics vary by deposit type and jurisdictional insurance regime.

Semantic Tension

Tension exists between viewing deposits as stable core funding versus as a contingent liability vulnerable to runs; the classification impacts liquidity metrics, pricing and capital planning.

Synthesis

Deposit funding is the practice of using customer deposits as a principal funding source: its value depends on deposit stickiness, cost dynamics, and concentration, requiring active pricing and liquidity management to harness its typically lower cost while controlling run and tenor risks.