Who banking leaves out — access, cost, and exclusion

The unbanked and the underbanked

Begin with two terms, because the difference matters. The unbanked have no bank account at all — they live entirely in cash and informal arrangements. The underbanked have an account but find it inadequate for their needs, so they still rely on costly alternatives outside the banking system: cheque-cashing outlets, payday lenders, money orders, prepaid cards. The first group is locked out; the second is let in the door but not well served.

The scale is large and global. By the most widely used measure — the World Bank's Global Findex — roughly 1.4 billion adults worldwide had no account as of the early 2020s. That figure has been falling impressively (it was around 1.7 billion a few years earlier and 2.5 billion a decade before), but it still represents a vast share of humanity outside the formal financial system, concentrated among the poor, women, rural populations, and those without identity documents.

It would be a mistake, though, to file this as a problem only of poor countries. Exclusion exists in the wealthiest economies too — quieter, smaller in percentage, but real, and concentrated among exactly the people who can least absorb it. This module deliberately looks at both, because the reasons for exclusion turn out to be similar everywhere, and they trace directly back to the economics of the conventional bank we built up in earlier modules.

Why the branch-and-credit model excludes

Exclusion is not mainly the result of prejudice or neglect. It is the predictable output of the conventional bank's economics — the very business model laid out in Modules 02 and 03. A bank built on branches, balances, and lending finds low-income customers genuinely unprofitable to serve, and a profit-seeking firm rationally turns away unprofitable customers.

Three features of the model do the excluding:

• The branch is expensive. A physical branch network costs a great deal to run, and that cost has to be recovered from customers. Serving someone who keeps a small balance, transacts in tiny amounts, or lives far from any branch costs more than they generate. The branch model is built for customers with enough money to make them worth the overhead.
• The bank profits on balances and lending. Recall from Module 02 that a bank earns the spread on the money it holds and lends. A customer with a low balance provides little to lend against, and a customer who is a poor credit risk cannot be lent to profitably. The people with the least money are, almost by definition, the least profitable to bank.
• Risk and compliance cost is fixed per customer. The work of onboarding, identity-checking, and monitoring a customer (the compliance machinery of Modules 05 and 06) costs roughly the same whether the account holds $50 or $50,000. Spread over a tiny balance, that fixed cost makes the account a money-loser.

Put together, these mean the conventional bank is structurally oriented toward customers who already have money. The poor are not excluded by accident; they are excluded because the branch-and-credit model cannot serve them at a profit. This is why, as later sections show, the breakthroughs in inclusion have come precisely from models that abandon the branch and decouple the account from lending — the mobile-money and narrow-account approaches that the innovation track explores.

The specific barriers

The structural economics of Section 02 show up, at the level of an individual trying to open an account, as a set of concrete barriers. Each one, on its own, sounds reasonable; together they form a wall.

• Minimum balances and fees. Many accounts require a minimum balance or charge monthly fees waived only above a threshold. For someone living close to the edge, a $10 monthly fee or a $500 minimum is not a minor inconvenience — it is a reason not to have an account at all, because the account would cost more than it is worth.
• Documentation and identity. Opening an account requires proving who you are and where you live — the know-your-customer rules of Modules 05 and 06. But the poor, the displaced, the homeless, and the undocumented often cannot produce the required identity documents or proof of address. The compliance system designed to keep criminals out also keeps out millions of legitimate people who simply lack the paperwork. (This is the hinge to the Identity sector covered in its own track: without verifiable identity, financial inclusion is nearly impossible.)
• Distance and access. Where branches are sparse — rural areas, poor urban neighborhoods that banks have abandoned — the nearest branch may be hours away. Physical access is itself a barrier.
• The credit-history trap. To borrow, you usually need a credit history; to build a credit history, you usually need to have borrowed. People outside the system have no record, so they are treated as unknowable risks and denied — a chicken-and-egg trap that keeps the excluded excluded.
• Distrust. Many unbanked people avoid banks deliberately, having been burned by fees, by a past account closure, or by living through a banking crisis. Distrust earned through bad experience is a rational barrier, not an irrational one.

The poverty premium

Here is the cruelest part of exclusion: those with the least money pay the most for basic financial services. Economists call it the poverty premium — it is expensive to be poor — and it turns exclusion into a trap that deepens the very poverty that caused it.

Consider what life without a bank account actually costs. To turn a paycheque into spendable money, the unbanked use cheque-cashing outlets that take a percentage off the top. To pay bills, they buy money orders, each with a fee. To borrow in an emergency, they turn to payday lenders whose effective annual rates can run into the hundreds of percent. They cannot receive wages by free direct deposit, cannot autopay to avoid late fees, and have no safe, interest-bearing place to keep savings — so cash is lost, stolen, or simply eroded. Each of these is a small toll, and paid over and over they add up to a substantial share of a low income spent simply on the mechanics of handling money that a banked person handles for free.

The result is a vicious circle. Being poor makes you unbankable; being unbanked makes you poorer; being poorer keeps you unbankable. The financial system, instead of helping people climb out, can quietly tax them for being at the bottom. This is why financial inclusion is treated not as a charity but as a development priority — bringing someone into the system removes a recurring drain on the little they have, and the gains compound.

Exclusion in rich countries

It is tempting to assume that wealthy countries, with banks on every corner, have solved inclusion. They have not — they have shrunk the problem and changed its shape. In rich countries exclusion is less about the absence of banking infrastructure and more about cost, documentation, and distrust pushing people out of a system that physically surrounds them.

The United States is the clearest example. By the regulator's own recurring survey, roughly one in twenty U.S. households is unbanked, and something closer to one in seven is underbanked — relying on payday lenders, cheque-cashers, or prepaid cards despite the country's enormous banking sector. And the burden is not evenly spread: unbanked rates are far higher among lower-income households, and among Black, Hispanic, disabled, and single-parent households, reflecting the structural barriers of Section 03 falling hardest on those already disadvantaged. The world's largest financial system still leaves millions outside it.

The European Union shows that policy can move the number. Concerned that exclusion was a barrier to full participation in society, the EU mandated, through its Payment Accounts Directive, that residents have the right to a basic payment account — a no-frills account with core features that banks must offer regardless of the customer's wealth. By making basic access a legal right rather than a commercial decision, the EU pushed account ownership toward near-universal. It is a reminder that the exclusion produced by the bank's economics (Section 02) is not fixed — a society can decide that basic banking is a right and require it, just as Module 01's German Sparkassen and Japanese postal banks treated basic banking as partly a public service.

The developing-world leapfrog

The unbanked are concentrated in the developing world — sub-Saharan Africa and South Asia above all. But this is also where the most dramatic progress in human history on financial inclusion has happened, and it happened by skipping the branch-and-credit model entirely rather than extending it. Where the conventional model could never reach profitably, new models leapfrogged straight past it.

Two stories define the leapfrog:

• Mobile money in Africa. As Module 01 noted, M-Pesa let Kenyans hold and move money through a phone, run by a telecom rather than a bank, with cash-in/cash-out handled by ordinary shopkeepers acting as agents instead of branches. The model spread across much of sub-Saharan Africa, bringing hundreds of millions into a basic store-and-pay system without a single new bank branch. It worked precisely because it discarded the expensive branch and the lending requirement — offering the store-and-pay function alone, cheaply, at the scale of a phone network.
• The digital-identity stack in India. India attacked the documentation barrier head-on. It built a universal digital identity system (Aadhaar), pushed banks to open hundreds of millions of no-frills accounts under a national program, and linked accounts, identity, and mobile phones together — the combination often called the "JAM" trinity (Jan Dhan accounts, Aadhaar identity, Mobile). Account ownership in India leapt from roughly a third of adults to around four-fifths within a decade, one of the fastest inclusion gains ever recorded.

The leapfrog reframes the whole module. The conventional bank excludes for structural reasons (Section 02), but those reasons are tied to a particular model — branches and lending. Strip that model away, offer the store-and-pay function on cheap digital rails, and solve the identity barrier, and the people the old system could never reach come in by the hundreds of millions. Exclusion is a property of the conventional design, not of the underlying need.

The comparative picture

Putting the regions side by side shows both the spread of exclusion and the variety of forces driving inclusion. The figures below are approximate and move year to year, but the pattern is stable and instructive.

Read across the table and a single lesson emerges. Where inclusion is high, it is because something overrode the conventional bank's exclusionary economics — a legal mandate (the EU), a digital-identity-and-accounts push (India), or a branchless mobile model (Africa). Where it lags, the branch-and-credit model has been left to its own logic, and that logic excludes. The conventional bank, unaided, does not include the poor; inclusion happens when policy or a new model forces or bypasses the issue. That is the empirical heart of the case for the innovations the companion track examines.

The last residual problem — and the handoff

This module completes the catalogue of what conventional banking does not solve. The bank's own economics — branches, balances, lending, fixed compliance cost — make the poor unprofitable to serve, and the barriers that follow (minimum balances, documentation, distance, the credit-history trap, earned distrust) lock millions out, in rich countries and poor ones alike. Exclusion then feeds on itself through the poverty premium. Yet the leapfrog stories prove the exclusion belongs to the model, not to the need: strip away the branch, decouple the account from lending, solve identity, and inclusion surges.

The access-specific responses the innovation track will develop are already visible in this module: mobile money and agent networks that replace the branch; digital identity systems that dissolve the documentation barrier; basic-account mandates that make inclusion a right; neobanks and fintechs targeting the underserved with low- or no-fee accounts; and the deeper structural ideas from Module 03 — narrow-style accounts and public digital money — that could offer a safe place to keep money without requiring anyone to be a profitable lending customer.

With this, the classic Banking track has surfaced its full set of residual problems across eight modules: a deposit is an unsecured claim on a leveraged lender, and holding digital money forces credit risk onto everyone (Module 03); the structure is inherently fragile and prone to runs (Module 04); the safety net that contains the fragility is costly and breeds moral hazard (Module 05); that same net walls the industry into a near-monopoly that even blocks the safer-money fixes (Module 06); moving money across borders is slow, expensive, and exclusionary (Module 07); and the whole apparatus leaves more than a billion people out (Module 08). The next and final module of this track gathers exactly these problems into one place — and hands them, as a single brief, to the companion track that begins where this one ends.

Test your understanding

Six questions on financial exclusion, its causes, and the forces that overcome it. The questions test the reasoning rather than memorization of any single statistic.