What it means
The idea comes from looking at the whole economy as a set of units that either save or borrow. Some units, such as many households, run surpluses and place their savings in banks or markets.
Others, such as young growing companies or governments investing in infrastructure, spend more than they take in and must obtain the difference from somewhere. Financial markets exist largely to connect these two groups.
Banks collect deposits from surplus units and lend them to deficit units, and bond and share markets do the same on a larger scale. Without this channel, businesses with good ideas but little cash could not grow.
Being a deficit spending unit is not automatically a problem. A start-up that spends heavily on equipment, or a family that buys a house with a mortgage, is a deficit unit in the year of the purchase.
What matters is whether the spending produces something that will repay the borrowing, such as future profit, a lasting asset or higher earning power. Persistent deficits without a plan to repay are more worrying.
A business that borrows every year to cover running costs eventually runs out of lenders, and a household that does the same ends up in difficulty. Lenders therefore look at the use of the borrowing, the deficit's size relative to income and the unit's ability to service the debt.
The classification can change over time, and the same organisation may be a deficit unit in one year and a surplus unit in the next. A company may borrow while building a factory, then become a surplus unit once the factory generates strong cash flow.
Treasury teams track this to plan funding and investment, and they usually build a forecast showing when the switch from deficit to surplus is expected.
In practice
Real-world examples.
Example
A fast-growing delivery start-up spends heavily on vans and software while customer numbers build. It runs a deficit funded by investors and a bank loan.
Example
A local government spends more than its tax receipts in a year to build a new school. It finances the difference by issuing bonds that will be repaid over decades.
Example
A young couple buy their first home with a mortgage. In that year their spending exceeds their income, so they are a deficit spending unit, and they repay the borrowing over time. Their bank assesses whether their future income can support the repayments.
Formula
Calculation
Deficit = total spending (including investment) - total income
Financing needed = deficit, met by new borrowing, new equity or running down cash
A manufacturer has income of $2,000,000 in a year and total spending, including a new machine, of $2,400,000. The deficit is $2,400,000 - $2,000,000 = $400,000. The company funds it with a $250,000 bank loan and $150,000 from its cash reserves. Check: $250,000 + $150,000 = $400,000, so the deficit is fully financed.Case study
Seen in the real world.
Brackenfield Dairies is an illustrative, fictional business that decided to build a new cheese-making facility. During the build year, its spending was $1,200,000 higher than its income.
The finance director classified the company as a deficit spending unit for that year in her funding plan and arranged a term loan for $900,000, with the rest coming from retained cash. She also set out a forecast showing that the new facility would earn enough extra profit to repay the loan in six years.
Brackenfield is a made-up company, so the numbers are illustrative only. The bank approved the loan because the deficit had a clear purpose and a repayment source, not because the company had weak finances. Having a deficit with a clear purpose was a sign of a business that was investing in its future. The loan was repaid early, because the new facility sold more cheese than the original forecast.
Watch out
Common mistakes.
- Assuming that a deficit spending unit is in financial trouble, when many healthy businesses run temporary deficits to invest.
- Borrowing to cover running costs year after year without a plan to return to surplus.
- Ignoring that the same entity can switch between deficit and surplus status as its circumstances change.
Questions
People also ask.
What is the opposite of a deficit spending unit?
A surplus spending unit, which earns more than it spends and has funds to save or lend.
How do deficit spending units fund themselves?
They borrow from banks, issue bonds or shares, draw on past savings or sell assets.
Why does the concept matter to businesses?
It helps explain why financial markets exist, and it frames funding decisions as a question of when the business is a borrower and when it is a saver, which is useful when talking to lenders.
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