Security Assistance Meaning: Definition vs. $2,740.0bn World Spending
A plain-language definition of security assistance — and why it isn't the same thing as a country's own military budget.
Key takeaways
- Security assistance means aid — training, equipment, or funding — that one state gives another to build the recipient's own military capacity; it is distinct from a country's own defense budget.
- World military expenditure totaled $2,740.0bn across 149 countries in 2025, per our calculation from SIPRI country-level data — and within NATO, 9 of 32 members still fell short of the alliance's 2%-of-GDP guideline, the kind of gap security assistance is often meant to help close.
- A donor's security assistance is generally counted in the donor's own military expenditure; it does not automatically appear in the recipient's reported spending.
- The $2,740.0bn figure is a floor, not a complete world total, since some spenders (including North Korea) are absent from the SIPRI dataset.
Verdict
Security assistance means aid transferred between states to build a partner's military capacity — a distinct concept from national military expenditure, which totaled $2,740.0bn across 149 countries in 2025 per our calculation from SIPRI country-level data. That figure is a floor: several states, including North Korea, are missing from the underlying dataset. Within NATO specifically, 9 of 32 members still fell short of the 2%-of-GDP guideline in 2025 — the burden-sharing gap that security assistance debates most often turn on.
At a glance
| NATO members below 2%-of-GDP guideline, 2025 | 9 of 32Our estimate from SIPRI country data and NATO GDP shares |
|---|---|
| Combined shortfall to reach 2% guideline | ≈$38bnApproximate, based on 2025 GDP estimates |
| Currency basis | SIPRI constant 2024 US$Not current-year nominal dollars |
| Data status | Actual, not estimate2025 is a reported year, not projected |
Security assistance means aid — training, equipment, funding, or advisory support — that one state provides to help another state build or sustain its own military and defense capacity. It is not a country's own defense budget: in 2025, world military spending — per our calculation from SIPRI country-level data — totaled $2,740.0bn across the 149 countries SIPRI tracks, and security assistance is a small, targeted transfer within that much larger picture, not a synonym for it.
Data as of 2026-04-27.
Who this is for: journalists, policy analysts, and researchers who need to distinguish security assistance — aid one state gives another — from a country's own national defense budget when reporting on military spending figures.
01 What Does Security Assistance Mean?
At its core, security assistance is a transfer relationship. A donor state gives money, weapons, training, or logistical support to a recipient state so the recipient can defend itself, deter a threat, or participate in a shared security effort. It covers programs like foreign military financing, equipment grants, joint training exercises, and capacity-building for police or border forces when those forces have a security mandate. What unites these forms is direction: the resource moves from one government to another, rather than being spent internally on a country's own forces.
02 What Is Security Assistance? Key Elements of the Definition
What is security assistance, precisely? Definitions used by governments and international bodies generally share four elements:
- Bilateral or multilateral transfer — the assistance moves between states or through a coalition, not within a single country's own budget.
- Military or security-sector purpose — funds or goods are earmarked for defense capacity, not general economic development.
- Recipient-side capacity building — the goal is strengthening the receiving state's own forces, not the donor conducting operations directly.
- Formal government-to-government channel — assistance is typically routed through official aid or defense-cooperation programs, distinguishing it from private arms sales.
Together these elements separate security assistance from ordinary defense procurement: a country buying its own tanks is military expenditure; a country giving another country tanks, training, or funding to buy tanks is security assistance.
03 How Security Assistance Differs From Military Expenditure
Military expenditure — the figure SIPRI's dataset measures — is what a country spends on its own armed forces: personnel, operations, procurement, R&D, and infrastructure, funded from its own budget. Security assistance, by contrast, is a cross-border flow that may originate from one country's military expenditure and land, at least partly, inside another country's defense capability. A donor's security-assistance spending is typically counted within the donor's own military expenditure total, while the recipient's use of that aid may or may not appear separately in the recipient's reported spending, depending on how the transfer is structured and recorded.
This distinction matters for reading spending tables correctly: a country's reported military expenditure in the 2025 world rankings reflects its own budget, not aid it has received from allies.
04 Security Assistance in Context: The $2,740.0bn World Total for 2025
To size security assistance meaningfully, it helps to see the total pool of military spending it sits inside. Our calculation from SIPRI country-level data finds that the 149 countries SIPRI reports for 2025 spent a combined $2,740.0bn on their militaries, in SIPRI constant 2024 US dollars. Security assistance programs — the aid flows discussed above — are a fraction of this figure, since most of the $2,740.0bn represents countries funding their own forces rather than transferring resources to others.
| Metric | Value |
|---|---|
| World military expenditure, 2025 | $2,740.0bn |
| Countries included in the total | 149 |
This total is our calculation from SIPRI country-level data, not a figure SIPRI itself publishes as a world total. It is a sum of the 149 countries SIPRI reports for 2025. North Korea has no reported series and several other states have gaps, so the true global figure — and the true scale of security assistance flowing within it — is somewhat higher. Treat $2,740.0bn as a floor, not the whole world.
05 Where to See Country-by-Country Military Spending
Because security assistance is defined against the backdrop of national military budgets, understanding it fully means being able to compare those budgets directly. The 2025 world rankings break the $2,740.0bn total down by country, showing which states spend the most on their own forces — the base figure against which any security-assistance flow, in or out, should be measured. For definitions of related terms, see the Glossary.
Frequently Asked Questions
- What is security assistance?
- Security assistance is aid — such as training, equipment, or funding — that one state provides to another to build or sustain the recipient's own military or defense capacity, distinct from a country spending on its own forces.
- What does security assistance mean in international relations?
- It refers to government-to-government transfers meant to strengthen a partner state's security capabilities, as opposed to unilateral military expenditure, which is spending a country makes on its own armed forces.
- How is security assistance different from military expenditure?
- Military expenditure, such as the $2,740.0bn world total for 2025 — our calculation from SIPRI country-level data, not SIPRI's own published total — is spending by a country on its own forces across the 149 countries SIPRI reports. Security assistance is a transfer from one country to another intended to build the recipient's capacity.
- Does the $2,740.0bn figure include security assistance?
- It reflects national military expenditure only, in SIPRI constant 2024 US dollars — again, our calculation from SIPRI country-level data, not SIPRI's own published total. Security assistance a donor gives is typically counted within the donor's own reported spending, not tracked as a separate global category.
defensebudget.org
Defense spending data, sourced from SIPRI
defensebudget.org tracks military expenditure for 160 countries using the SIPRI Military Expenditure Database. Pages are generated from that dataset and reviewed before publication.