In national accounting, debts are added according to those who are indebted. Household debt is the debt held by households. "National" or Public debt is the debt held by the various governmental institutions (federal government, states, cities ...). Business debt is the debt held by businesses. Financial debt is the debt held by the financial sector (from one financial institution to another). Total debt is the sum of all those debts, excluding financial debt to prevent double accounting. These various types of debt can be computed in debt/GDP ratios. Those ratios help to assess the speed of variations in the indebtness and the size of the debt due. For example the USA have a high consumer debt and a low public debt, while in eastern European countries, for example, the opposite tends to be true.

There are differences in the accounting of debt for private and public agents. If a private agent promises to pay something later, it has a debt, and this debt is enforceable by public agents. If a public body passes a law stating that it'll pay something later (a kind of promise), it keeps the right to change the law later (and not to pay). This is why, for instance, the money governments promised to pay for retirements does not show up in the public debt assessment, whereas the money private companies promised to pay for retirements do.

Securitization

Securitization occurs when a company groups together assets or receivables and sells them in units to the market through a trust. Any asset with a cash flow can be securitized. The cash flows from these receivables are used to pay the holders of these units. Companies often do this in order to remove these assets from their balance sheets and monetize an asset. Although these assets are "removed" from the balance sheet and are supposed to be the responsibility of the trust that does not end the company's involvement. Often the company maintains a special interest in the trust which is called an "interest only strip" or "first loss piece". Any payments from the trust must be made to regular investors in precedence to this interest. This protects investors from a degree of risk, making the securitization more attractive. The aforementioned brings into question whether the assets are truly off-balance-sheet given the company's exposure to losses on this interest.

Debt, inflation and the exchange rate

As noted above, debt is normally denominated in a particular monetary currency, and so changes in the valuation of that currency can change the effective size of the debt. This can happen due to inflation or deflation, so it can happen even though the borrower and the lender are using the same currency. Thus it is important to agree on standards of deferred payment in advance, so that a degree of fluctuation will also be agreed as acceptable. It is for instance common to agree to "US dollar denominated" debt.

The form of debt involved in banking accounts for a large proportion of the money in most industrialised nations. There is therefore a relationship between inflation, deflation, the money supply, and debt. The store of value represented by the entire economy of the industrialized nation, and the state's ability to levy tax on it, acts to the foreign holder of debt as a guarantee of repayment, since industrial goods are in high demand in many places worldwide.

Inflation indexed debt

Borrowing and repayment arrangements linked to inflation-indexed units of account are possible and are used in some countries. For example, the US government issues two types of inflation-indexed bonds, Treasury Inflation-Protected Securities (TIPS) and I-bonds. These are one of the safest forms of investment available, since the only major source of risk — that of inflation — is eliminated. A number of other governments issue similar bonds, and some did so for many years before the US government.