Fiscal vs monetary policy: who controls which lever

Two sets of hands steer the US economy's overall demand. Fiscal policy is what Congress and the President do with the federal budget: how much the government spends, how much it taxes, and how much it borrows to cover the gap. Monetary policy is what the Federal Reserve does with interest rates and its own balance sheet to influence the cost and availability of credit.

Both push on the same thing, total spending in the economy, but they work through different channels, at different speeds, and under different political rules. Markets watch both, because the mix decides where interest rates, inflation and profits are likely to settle. This guide explains who controls each lever, how each one reaches the economy, how they can reinforce or fight each other, and what the federal data from 2020 to 2026 show about the mix.

Two levers, two owners

Fiscal policy

The federal budget is the government's plan for the fiscal year, which runs from October 1 to September 30. Spending falls into two broad kinds: programs whose spending follows from existing law, such as Social Security and Medicare, and spending Congress sets each year through appropriations. Revenue comes mostly from individual income and payroll taxes, plus corporate taxes, tariffs and other receipts.

When outlays exceed receipts, the government runs a deficit, and the Treasury borrows the difference by selling bills, notes and bonds. The accumulated borrowing is the national debt. Government debt and deficits: how US federal borrowing works covers that arithmetic in detail.

Fiscal policy changes demand in three main ways:

• Direct purchases. Government spending on goods and services counts directly in GDP.
• Transfers. Checks to households (unemployment benefits, tax credits, relief payments) raise disposable income, some of which gets spent.
• Taxes. Lower tax rates leave households and firms with more after-tax income; higher rates do the reverse.

Some fiscal support switches on by itself. When the economy weakens, tax receipts fall and unemployment benefits rise without any new law, so the deficit widens automatically. Economists call these automatic stabilizers. Everything else, a stimulus bill or a tax cut, is discretionary and needs legislation.

Monetary policy

The Federal Reserve Act directs the Fed to promote "maximum employment, stable prices, and moderate long-term interest rates." The Federal Open Market Committee (FOMC) interprets stable prices as 2% inflation, measured by the annual change in the price index for personal consumption expenditures (PCE).

Its main tool is the target range for the federal funds rate, the rate banks charge each other for overnight loans, which has been set as a range 25 basis points wide since December 2008. The Fed moves the market rate into that range chiefly by changing the interest it pays on banks' reserve balances. It also has two other levers:

• The balance sheet. Buying Treasury and mortgage securities (quantitative easing) pushes down longer-term yields; letting them run off (quantitative tightening) does the reverse. See Quantitative easing and tightening: the Fed’s balance sheet.
• Forward guidance. Statements and the quarterly dot plot shape what markets expect rates to be later, which moves longer-term yields today.

The FOMC holds eight scheduled meetings a year (2026: late January, mid-March, late April, mid-June, late July, mid-September, late October and early December) and can meet in between if needed. Its statement is released at 2:00 p.m. Eastern on the final day. FOMC meetings: schedule, statement, minutes and how to read them explains how a meeting works.

How each one reaches the economy

The two levers travel different routes before they touch spending and prices.

Monetary policy's weakness is that it is blunt and indirect: a rate cut helps only people and firms that want to borrow and can. Fiscal policy's weakness is that it is slow and political: by the time a bill passes, the downturn it was meant to cushion may be over, and spending programs are hard to reverse.

Worked example: sizing a deficit

A deficit is easiest to compare across years as a share of the economy. The fiscal year 2026 deficit, which ended September 30, 2026, was $1,992 billion (Treasury/OMB data via FRED). Nominal GDP averaged about $32.2 trillion at an annual rate over the four quarters that make up that fiscal year (Q4 2025 through Q3 2026).

The same scaling applies to the Fed. Its balance sheet held about $4.16 trillion of assets on February 26, 2020, and peaked at $8.97 trillion on April 13, 2022. On October 28, 2026 it held $6.75 trillion.

The policy mix: same direction or opposite

What matters for markets is the combination. Four broad mixes are possible:

The third row is the one investors meet most often in the 2020s. When the Treasury is borrowing heavily and the Fed is restraining demand, the Fed may hold rates higher than it otherwise would, and investors absorb a larger supply of Treasury debt at the same time. Both effects lean toward higher yields, which feeds into stock valuations through the discount rate (How interest rates affect stocks: discount rates and equity duration).

What the data show, 2020 to 2026

2020: both levers wide open. The FOMC cut the top of its target range from 1.75% to 1.25% (effective March 4, 2020) and then to 0.25% (effective March 16). The Fed's assets went from $4.24 trillion on March 4 to $7.17 trillion on June 10, 2020. On the fiscal side, the deficit for the year ending September 30, 2020 was $3.13 trillion, about 14.7% of GDP, followed by $2.77 trillion (about 12.0%) in fiscal 2021.

2022–2023: both levers tighten. The FOMC raised the top of the range eleven times between March 2022 and July 2023, from 0.25% to 5.50%, and began shrinking its balance sheet. The deficit also fell, to $1.38 trillion in fiscal 2022 (about 5.4% of GDP), as pandemic programs expired, before rising again to $1.70 trillion in fiscal 2023.

2024–2026: the levers diverge. The Fed cut six times between September 2024 and December 2025, taking the top of the range to 3.75%, and then raised it by 25 basis points in September 2026, to a range of 3.75–4.00%, which it held at the October 27–28, 2026 meeting. Meanwhile deficits stayed between $1.78 trillion and $1.99 trillion a year, around 6% of GDP, from fiscal 2024 to fiscal 2026. That is the "loose budget, tight money" mix in the table above: in September 2026 the 10-year Treasury yield averaged 4.99%, its highest monthly average since July 2007.

These are descriptions of what the series did, not a verdict on why. Each policy change had its own stated reasons; the FOMC statements and the budget documents are the place to read them.

Pitfalls and limitations

• Attribution is hard. Inflation, growth and yields respond to both policies, to energy prices, to the rest of the world and to private behavior. Saying "the deficit caused the inflation" or "the Fed caused the slowdown" usually oversimplifies.
• Lags differ and overlap. A rate change can take many months to show up fully in hiring and prices, and a spending law can pay out over a decade. Policies enacted years apart can be working at the same time.
• The deficit is not one decision. Much of it comes from programs on autopilot and from the business cycle itself, so a widening deficit in a recession is not necessarily new stimulus.
• The Fed does not set long-term rates. It sets an overnight rate and influences the rest. Ten-year yields can rise even while the Fed cuts, as investors weigh inflation, deficits and the term premium.
• Independence has limits by design. The Fed sets policy without needing legislation, but it answers to Congress, which wrote its mandate and can change it.

Fiscal and monetary policy compared with neighbors

How Finabase does it

Finabase does not publish budget, deficit or Fed data, and it has no economic calendar. The charts and numbers on this page are ours, built from public Treasury, BEA and Federal Reserve series. What the app does show is where policy lands in markets:

• The Treasury page lists yields from 1 month to 30 years. Short maturities track the Fed's target range closely; the 10- and 30-year yields also carry the market's view of inflation and government borrowing.
• The 10-year yield symbol page shows that yield's history on a chart.
• The Discover feed's Fed and Economy topics collect news articles about rate decisions and budget fights.

Frequently asked questions

What is the main difference between fiscal and monetary policy?

Fiscal policy is the government's taxing and spending, decided by Congress and the President; monetary policy is the Federal Reserve's management of interest rates and its balance sheet. Fiscal policy acts through budgets and can target specific groups; monetary policy acts through the cost of credit for everyone.

Which is faster, fiscal or monetary policy?

Monetary policy is faster to change: the FOMC can move rates at any of its eight scheduled meetings or between them. Fiscal policy needs legislation, which usually takes months, although automatic stabilizers such as unemployment benefits respond right away.

Can the Fed and Congress work against each other?

Yes. If Congress runs large deficits while the Fed is trying to slow inflation, the Fed may keep rates higher for longer to offset the extra demand. In 2026 the FOMC raised its target range in September while the fiscal-year deficit was about $1.99 trillion.

Does the Fed pay for government deficits?

No. The Treasury borrows by selling securities to investors. The Fed buys Treasuries in the open market as part of monetary policy, which can ease financing conditions, but deficits are financed by Treasury borrowing, not by the Fed directly.

Summary

Fiscal policy is the federal budget, set by Congress and the President, and it shows up in deficits, debt and government spending; monetary policy is the Federal Reserve's interest-rate target, balance sheet and guidance, set by the FOMC at eight meetings a year. Fiscal policy is slow but targeted; monetary policy is quick but blunt. The mix is what markets price: in 2020 both levers pushed demand up hard, in 2022–2023 both pulled back, and from 2024 to 2026 the Fed moved between cutting and tightening while deficits held near 6% of GDP, alongside 10-year yields that reached their highest monthly average since 2007.