Margins Are Shrinking
in Banks & Financial Services

The short answer

Net interest margin rarely falls because cost of funds rose. It falls because the mix of loans and deposits changed and nobody adjusted origination or pricing. Banks and financial services firms carry a specific bind here — the branch network is simultaneously the deposit moat and the cost problem — and the relationship knowledge sits in six people close to retirement. Until that is priced, efficiency ratio will keep moving for reasons nobody can attribute, and the debate about gross margin by product will stay a matter of opinion.

A shrinking net interest margin has three possible causes and they call for opposite responses. Cost of funds rose and loan pricing did not follow. Mix shifted toward deposits with higher beta or loans with lower spreads. Or cost to serve rose invisibly through more relationship support, custom covenants, and rework inside accounts whose rates never changed.

The third is the most common and the hardest to see, because it never appears as a cost increase. It appears as the same book requiring more of the branch network and the six people close to retirement to deliver it. Efficiency ratio hides it completely: two commercial relationships at wide spread and narrow spread average to a respectable blended margin.

Which is why the first useful step is almost never an efficiency programme. It is disaggregating net interest margin and efficiency ratio by lending segment, by deposit customer and by channel until the aggregate stops lying to the chief lending officer and the CFO.

How to tell this is actually your problem

These three together are the signature. One on its own usually points somewhere else.

✓ Revenue from the lending book is up and profit is not
✓ Efficiency ratio looks stable in aggregate and nobody can state the margin on a specific deposit relationship or origination
✓ Rate concessions have become routine to close commercial loans by quarter end

The move that usually makes it worse. Running an across-the-board efficiency reduction, which cuts hardest into the relationships that still carry the deposit moat because that is where the capacity and the retiring knowledge sit.

Who this is for — and who it is not

It is for you if you run or finance a bank and revenue is up and profit is not. It is the situation where the numbers are available but nobody has put them in an order that produces a decision.

It is not for you if Percision is the wrong tool if you already know the answer and only need execution capacity, or if the business is pre-revenue — then the constraint is evidence about the market, not analysis of your own figures. Percision is not a lawyer, tax advisor, auditor, licensed appraiser, clinical or regulatory filer, or an AI implementation shop. It does not do HR casework, creative-only brand work, or impersonate a named consulting firm. It is a strategy analysis engine — not a template library. Also wrong if you need facilitation, politics, or someone to sit with a lender or buyer. Those are human jobs.

Percision is not a lawyer, tax advisor, auditor, licensed appraiser, clinical or regulatory filer, or an AI implementation shop. It does not do HR casework, creative-only brand work, or impersonate a named consulting firm. It is a strategy analysis engine — not a template library.

What this looks like when the analysis is actually run

Below is an excerpt from a real run of this analysis on a bank. It is a sample profile rather than a customer, and it is unedited engine output — this is the format you get, on your own numbers.

The subject is Harborline Financial Group, a sample company profile used for testing rather than a customer — $3.1B commercial lending book, $410M of deposits.

This is one move out of a full analysis. Read a complete report — every page, no email required.

What the engine does with this question

This question routes to Cost & Margin Improvement, one of 29 engagements the platform runs. For banks and financial services firms it works through efficiency ratio, cost of funds, origination per banker and deposit concentration, then produces the sequence rather than a list of options — which move first, what it funds, and the observation that would say the sequence is wrong.

You watch the analysis get built before paying anything. Read a complete report here if you would rather see the depth first.

Questions people ask about this

Should I raise prices or cut costs first?

Price, if the analysis shows your realised price has drifted below the value you deliver — it arrives on the next invoice and requires no new customers. Cost, if the problem is cost to serve rather than price. Doing both at once makes it impossible to tell which one worked.

How do I find cost to serve without a new accounting system?

You do not need one. Take the ten largest customers and allocate the obvious variable effort — support hours, delivery exceptions, custom work, payment terms. The ranking is almost always clear long before the numbers are precise, and the ranking is the decision.

Is a falling margin always bad?

No. Deliberately buying share with margin is a strategy. The problem is drifting into it without deciding to, which is what almost always happens, because each individual discount is defensible and the pattern is invisible until the year closes.

Is this different in banks & financial services than in other industries?

Materially, yes. The branch network is simultaneously the deposit moat and the cost problem — and the relationship knowledge sits in six people close to retirement — which changes both the diagnosis and the order of the fixes. The metrics that decide it here are efficiency ratio, cost of funds, origination per banker, and an answer built on industry-general benchmarks will usually point at the wrong one first.

What data do I need before this analysis is worth running for a bank?

Less than most people expect. Your last twelve months of revenue and cost split the way you already split it, plus whatever you hold on efficiency ratio and cost of funds. The analysis is explicit about what it is assuming where your data stops, which is more useful than waiting for numbers you may never have.

When is Percision the wrong tool?

Percision is the wrong tool if you already know the answer and only need execution capacity, or if the business is pre-revenue — then the constraint is evidence about the market, not analysis of your own figures. Percision is not a lawyer, tax advisor, auditor, licensed appraiser, clinical or regulatory filer, or an AI implementation shop. It does not do HR casework, creative-only brand work, or impersonate a named consulting firm. It is a strategy analysis engine — not a template library. Also wrong if you need facilitation, politics, or someone to sit with a lender or buyer. Those are human jobs.

Does Percision replace a lawyer, tax advisor, auditor, or AI implementation team?

Percision is not a lawyer, tax advisor, auditor, licensed appraiser, clinical or regulatory filer, or an AI implementation shop. It does not do HR casework, creative-only brand work, or impersonate a named consulting firm. It is a strategy analysis engine — not a template library.