Aflac sells supplemental insurance, which means it sells policies that sit on top of whatever health coverage a person already has. When a policyholder gets sick or hurt, Aflac pays cash directly to them, not to a hospital or doctor. That cash helps cover the costs that regular insurance does not pay, like lost wages, travel to treatment centers, or everyday bills that pile up during a medical crisis. Aflac collects premiums every month, whether or not anyone files a claim, and that steady stream of premium payments is the engine of the entire business. The company runs two big segments: Aflac Japan, which is the largest cancer and medical insurance provider in Japan, and Aflac U.S., which sells accident, cancer, disability, hospital indemnity, dental, vision, and life policies mostly at worksites through independent agents and brokers. The diagram below traces where the money goes.
How Aflac Makes Money
flowchart TD
A["Policyholders Pay Premiums"] --> B["Premium Revenue
17.2B annually"]
B --> C["Claims Payments to
Policyholders"]
B --> D["Investment Portfolio
Management"]
D --> E["Investment Income
and Returns"]
E --> B
C --> F["Operating Margin
Protection"]
F --> G["Sales Force
Commissions"]
G --> H["Agent and Broker
Network Growth"]
H --> A
B --> I["Distribution Network
Maintenance"]
I --> H
E --> J["Shareholder Value
and Growth"]
J --> H
Five years of financial data tell a story of gradual pressure. Revenue has moved in one direction: down. The decline is not dramatic in any single year, but it is persistent.
Total Revenue 2021 to 2025 ($ billions)
Revenue has fallen from $21.6B in 2021 to $17.2B in 2025. The 2025 drop was partly driven by $572 million in net investment losses, compared with $1.3 billion in net investment gains the year before.
Cash generation has also trended lower. Operating cash flow was $5.1 billion in 2021 and fell to $2.6 billion in 2025. That is roughly half as much cash produced in four years. At the same time, the company has been spending heavily on share repurchases. In 2025 alone, Aflac repurchased $3.5 billion of its own shares. The company is returning cash to shareholders even as its cash production shrinks, which means the cushion between what comes in and what goes out is getting thinner.
$2.6B
Operating cash flow in 2025, down from $5.1B in 2021
One number that looks healthier is net debt. Aflac carries negative net debt, meaning it holds more cash and liquid assets than it owes in debt. That figure was negative $6.2 billion at the end of 2025, which signals that the balance sheet is not stretched. Net earnings also remained positive at $3.6 billion in 2025, though that was down from $5.4 billion in 2024. The core insurance business is still generating real profit. The question is whether the downward trend in revenue and cash flow stabilizes or continues.
What Is Supplemental Insurance?
Primary health insurance pays doctors and hospitals directly. Supplemental insurance pays cash to the policyholder after a covered event like a cancer diagnosis or an accident. The money can be used for anything: rent, food, or out-of-pocket medical costs. Because the benefit is cash, not a service, and because premiums are collected regularly, the business model looks a lot like a subscription.
Aflac's biggest structural risk is geographic concentration. Japan is not just a large market for Aflac. It is the market. More than half of the company's revenue and 76 percent of its assets come from the Japan business. That creates a situation where a weakening Japanese yen, a slowdown in Japan's economy, or a shift in Japanese government bond values could damage the whole company's finances in a way that the U.S. business alone could not offset.
76%
Share of total assets held in the Aflac Japan segment
Why Currency Matters So Much Here
Aflac Japan earns premiums in Japanese yen. When those yen are converted into U.S. dollars for reporting, a weaker yen means fewer dollars show up on the books. This is not just an accounting issue. The parent company needs dollars to pay dividends and buy back shares. If the yen stays weak, less money flows from Japan to the U.S. side of the business.
The investment portfolio adds another layer of risk. Aflac holds large amounts of commercial real estate investments and loans to highly leveraged companies. Rising interest rates have put pressure on those assets, leading to credit rating downgrades, defaults, and falling values. This is what drove the $572 million in net investment losses reported in 2025. The company is also caught in an interest rate squeeze: the bonds it bought when rates were low have lost value as rates rose, and if rates fall, the company faces higher payouts on insurance benefits it already promised.
2025
crisis
Cyberattack Exposes 22.65 Million People
In June 2025, attackers broke into Aflac's U.S. systems and stole personal information including health data, social security numbers, and claims records belonging to approximately 22.65 million customers, employees, agents, and others. The company says it contained the breach within hours and that regular operations were not disrupted. Aflac is still assessing the full financial impact, including potential lawsuits, regulatory investigations, and higher cybersecurity insurance costs going forward.
The cyberattack is a new and still-unresolved risk. Aflac has said it does not currently believe the incident will have a material impact on its finances, but the final cost depends on how many people sue, what regulators decide, and how much remediation ends up costing. Twenty-two million affected individuals is a large number, and the legal and reputational tail on an event like this can stretch for years.
Aflac Japan distributes cancer insurance through roughly 20,000 Japan Post outlets and about 37,000 Dai-ichi Life representatives, in addition to its own 6,300 sales agencies. That distribution breadth is part of what makes the Japan franchise hard to replicate, but it also means the business is deeply embedded in a single country's financial and regulatory ecosystem.
The $1.8B drop was largely driven by a swing from $1.3B in net investment gains in 2024 to $572M in net investment losses in 2025. Adjusted earnings, which strip out investment swings, fell by a smaller amount: from $4.1B to $4.0B.
The Bet
Aflac's Japan business holds its position as the dominant cancer and medical insurance provider in a country with an aging population and rising out-of-pocket healthcare costs. That demographic pressure is real, and it creates genuine long-term demand for exactly what Aflac sells. But the whole model requires that the yen does not weaken so much that Japan's profits become too small to sustain U.S. dividends and share repurchases, that the investment portfolio stops bleeding from credit losses and fallen bond values, and that no major competitor cracks open Japan's supplemental insurance market in a way that erodes Aflac's pricing power. All three of those conditions have to hold at the same time. If even one breaks down badly, the financial trajectory gets harder to reverse.
Open question
Revenue has fallen for four of the last five years. Cash flow has been cut roughly in half. The company is returning billions to shareholders through repurchases even as its cash engine shrinks. Japan represents more than half of revenue and 76 percent of assets, and the yen has been weak. A cyberattack just affected 22.65 million people, with the legal and regulatory fallout still unknown. Is the revenue decline a temporary problem caused by currency swings and investment losses that will correct on their own, or does it reflect something more durable about how hard it is to grow a business this concentrated in a single country with a weakening currency and an increasingly competitive market?
Compiled · 10-K · FY2025
Investment Portfolio
The company owns large amounts of commercial real estate investments and loans to highly leveraged companies that are suffering from high interest rates and economic weakness. These investments are experiencing credit rating downgrades, defaults, and falling values, which could significantly reduce the company's earnings and financial strength.
Japan Market Concentration
More than half of the company's revenue and 76 percent of its assets come from its Japan business. If Japan's economy weakens, its government bonds lose value, or its markets become unstable, the entire company's financial health could be severely damaged.
Interest Rate Risk
The company invested heavily in bonds when interest rates were low. If interest rates keep rising, those old bonds lose value and the company earns less income from new investments. If rates fall, the company has to pay higher amounts on insurance benefits it promised, shrinking profits.
Foreign Currency Exposure
The company converts profits from its Japan business (earned in Japanese yen) into U.S. dollars for the parent company. If the yen weakens against the dollar, these conversions produce fewer dollars and can strain cash available for dividends and debt payments.
Cybersecurity
In June 2025, the company experienced a cyber attack where personal information of many customers, employees, and agents was stolen. Future attacks could disrupt business operations, damage the company's reputation, trigger lawsuits, and result in significant remediation costs.
10-K Item 1A · Risk Factors
