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FINANCIAL PRODUCT ANATOMY / 02

Credit Card Operating Model

Activation, real-time decisions, purchase behavior, revolving balances and P&L — connected in one executive instrument.

A credit card is not simply a credit line with a payment credential. It is a payment instrument, a revolving credit portfolio and a real-time decision platform operating on the same customer relationship.

Issuing more cards does not create value. Activating profitable behavior does.
Credit cards and issuer economics
José Ñáñez
José ÑáñezTechnology Advisor · Board Member
Published July 18, 2026Updated August 31, 202612 min read

PRODUCT ECONOMICS

Two engines share the same customer — but not the same economics

Payments and credit interact, but they generate value through different mechanisms. Purchase volume can improve while credit economics deteriorate, or vice versa.

Behavior

01

Payments engine

Value appears when an issued account becomes recurring, profitable purchase behavior.

Activation and recurring use

Interchange and fees

Rewards and benefits

Scheme and processing

Fraud and disputes

Service cost per active card

What remains after rewards, fraud, processing and service?

Balance

02

Credit engine

Value appears when revolving balances earn enough to absorb funding, loss and collections.

Revolving balance

Portfolio yield

Funding cost

Credit loss

Collections

Risk-adjusted contribution

What remains after funding, credit loss and collections?

Four customer states matter more than issued cards

The strategic issue is not the size of the issued base. It is what behavior that base produces and what economics remain after every associated cost.

01

Issued · inactive

Acquisition and issuance cost without recurring purchase behavior.

Installed capacity without economic use.

02

Transactor

Interchange and fees, with rewards, processing, fraud and service costs.

Volume creates value only if unit contribution remains positive.

03

Healthy revolver

Interest income with funding, credit loss and collections exposure.

Balance creates value only after risk is recognized.

04

Delinquent

Lower effective yield, higher loss, collections and eventual charge-off.

Growth can become delayed value destruction.

A card portfolio should be managed as behavior first, balances second and issued plastic last.

OPERATING MODEL

A millisecond decision eventually reaches the P&L

The card operating model is a chain of decisions. Activation determines whether an account enters the economic system; authorization determines which purchases survive; repayment behavior determines whether the relationship remains transactional or becomes a credit exposure.

Management view

The objective is not to maximize approvals, spend or revolving balances independently. It is to orchestrate them so that incremental behavior remains economically positive.

01

Activation

Decision

Identify which inactive accounts can realistically become recurring users.

Economics

Active accounts → purchase volume → interchange, rewards, processing, fraud and service.

Preserve: Incrementality: do not pay to activate behavior that would occur anyway.

02

Authorization

Decision

Recover legitimate transactions currently lost to credit or fraud controls.

Economics

Recovered approvals → incremental volume → payments contribution.

Preserve: Risk discipline: additional approvals are not automatically good approvals.

03

Usage

Decision

Increase purchase frequency and relevance without buying unprofitable volume.

Economics

Spend → interchange and fees − rewards − processing − fraud.

Preserve: Unit contribution after every transaction cost.

04

Revolving

Decision

Grow sustainable revolving balances among customers able to carry them.

Economics

Balance → interest income − funding − credit loss − collections.

Preserve: Affordability and risk-adjusted return.

Operating chain

IssueActivatePurchaseAuthorizeSettlePay / revolveMonitor risk
The right card strategy optimizes customer behavior, not isolated product metrics.

TRACEABLE LEVERS

Three levers connect behavior decisions to the P&L

A lever is not a benefit by itself. Impact is recognized only after the decision changes an eligible population, a volume or a balance and the corresponding unit economics are applied.

LeverOperating decisionAffected variableP&L impact

Activation and usage

Inactive → active → volume

Convert a defined share of inactive accounts into active users and make the expected spending intensity explicit.

Define eligible inactive cards, conversion and expected spend versus a current active card.New active cards and incremental purchase volumeInterchange ↑ · rewards ↑ · processing ↑ · fraud ↑ · service ↑

Authorization optimization

Decline → recovered approval

Recover legitimate declined volume without assuming that every incremental approval carries the same fraud profile.

Define eligible declined volume, recovery and relative fraud of the recovered purchases.Recovered purchase volume and resulting authorization rateInterchange ↑ · rewards ↑ · processing ↑ · fraud may ↑

Healthy revolving

Eligible active → balance

Create incremental revolving balances only after funding, loss and collections economics remain visible.

Define eligible non-revolvers, conversion, initial balance intensity and relative risk.New revolvers and incremental average revolving balanceInterest income ↑ · funding ↑ · credit loss ↑ · collections ↑

EXECUTIVE INSTRUMENT

Change the behavior. Watch the economics move.

The model starts from an issuer operating base and P&L. Each control changes a population, volume or balance first; only then does the model recognize the financial consequence.

The objective is not to maximize one KPI. It is to understand whether the combined behavior improves profit before tax.

Live economics

Colombia · COP

Current PBT

COP 94,273 M

Transformed PBT

COP 89,541 M

Net annual impact

− COP 4,732 M

01

Reference country

Loads currency, references and starting assumptions.

2026-08 · Banco de la República reports an average value close to COP 170,000 for 2025 credit-card payments by individuals.
Assumptions and sources

70% activation, 89% authorization, revolvers at 35% of active cards, 26% portfolio yield and unit costs are editable modeling assumptions.

Banco de la República · Reporte de Infraestructura Financiera 2026Superintendencia Financiera de Colombia · tasas 2026

Live P&L

Decisions persist across tabs and the P&L accumulates every impact.

Activation − COP 2,083 MAuthorization + COP 127 MRevolving + COP 5,221 MInvestment OPEX − COP 7,997 MTotal − COP 4,732 M
Current COP 94,273 MTransformed COP 89,541 M
P&GCurrentTransformedΔ
Interchange incomeCOP 154,224 MCOP 160,280 M+ COP 6,056 M
Fees and other incomeCOP 126,000 MCOP 126,000 M
Rewards and benefitsCOP 91,392 MCOP 94,981 M+ COP 3,589 M
Scheme and processingCOP 28,560 MCOP 29,682 M+ COP 1,122 M
Fraud and disputesCOP 13,709 MCOP 14,311 M+ COP 602 M
Payments-engine contributionCOP 146,563 MCOP 147,307 M+ COP 744 M
Interest incomeCOP 318,500 MCOP 331,809 M+ COP 13,309 M
Funding costCOP 122,500 MCOP 127,619 M+ COP 5,119 M
Credit lossCOP 61,250 MCOP 63,809 M+ COP 2,559 M
CollectionsCOP 9,800 MCOP 10,210 M+ COP 410 M
Credit-engine contributionCOP 124,950 MCOP 130,171 M+ COP 5,221 M
AcquisitionCOP 45,696 MCOP 45,696 M
ServiceCOP 63,000 MCOP 65,700 M+ COP 2,700 M
Other operating expenseCOP 68,544 MCOP 68,544 M
Transformation OPEXCOP 0 MCOP 7,997 M+ COP 7,997 M
Profit before tax (PBT)COP 94,273 MCOP 89,541 M− COP 4,732 M
11

Review and traceability

Accumulated scenario across all three levers and investment.

LeverDecisionOperating resultPBT impact
Activation50% · 20% · 70%+30,000 · COP 342,720 M− COP 2,083 M
Authorization30% · 25% · 1.5×COP 105,897 M · 89.83%+ COP 127 M
Revolving25% · 15% · 60% · 1×+17,063 · COP 51,188 M+ COP 5,221 M

The model calculates through PBT; it excludes taxes, PAT and ROE.

METHOD, REFERENCES AND LIMITS

How to read the model correctly

It is a decision model, not a forecast

The simulator is deterministic and designed for executive scenario analysis. It is not a forecast, regulatory filing, accounting opinion, expected-credit-loss model or fraud model.

Payments and credit remain separate

The issuer P&L distinguishes payments contribution from credit contribution. Merchant acquiring, third-party processing and enterprise collections are outside the model boundary.

The model stops at profit before tax

Taxes, PAT and ROE are excluded because they depend on the institution’s tax, accounting and capital structure. Country presets are starting anchors, not conclusions.