Do loans help small businesses grow? Looking beyond microfinance

Much of what we know about access to finance comes from studies of microfinance, small loans typically made to self‑employed individuals or household businesses. This large body of evidence has shown that microcredit often increases business activity, but on average it has limited effects on profits and job creation. These findings have shaped how policy makers think about finance and development.

However, many small and medium-sized enterprises (SMEs) are not microenterprises. SMEs are established firms with employees, formal operations, and growth ambitions. The type of finance they need is also different: larger loans, extended through regulated financial institutions, under formal contracts. Surprisingly, despite the scale and policy importance of SME lending, there has been no clear answer to a basic question: Do formal bank loans help SMEs grow, hire more workers, and become more profitable?

Individual studies point in different directions. Some have shown strong positive effects, while others have found modest or even negligible impacts. Differences in countries, programs, lenders, and firm types make it hard to know what lessons apply more broadly.

To address this gap, our paper takes a different approach. Instead of focusing on one program or country, we synthesize evidence from 24 rigorous impact evaluations worldwide, concentrating exclusively on formal loans to existing SMEs, rather than microcredit or household lending. By bringing together this global evidence, we can answer a simple but critical question: When small businesses get access to formal credit, what really happens?

The answer is more encouraging than the microfinance debate might suggest.
 

What happens when SMEs obtain formal loans?

The message from the data is clear. On average, access to a formal loan leads to substantial improvements in firm performance. The studies we analyze found that SMEs that receive loans experience the following:

• A 12 percent increase in employment (refer to figure 1)
• An 18 percent increase in sales
• An 18 percent increase in profits.

These effects are economically meaningful. Compared to the microfinance literature, which has typically found small and uneven impacts, especially on profits, formal SME loans play a much stronger role in supporting business growth and job creation.

Figure 1: Estimated Effects of Formal Loans on SME Employment

Note: This forest plot displays the estimated effects of formal loans on SME employment—expressed as percentage changes—across individual studies. The vertical dashed line represents the average effect, estimated using Bayesian Hierarchical Model (BHM) with normally distributed priors N(0,100^2 ) for both the average effect (μ) and across-study heterogeneity (τ^2). The point estimates for individual studies reflect the posterior means obtained from the BHM, rather than the original point estimates reported in each study. The horizontal lines indicate the 95% confidence intervals. EAP = East Asia & Pacific, ECA = Europe & Central Asia, LAC = Latin America & Caribbean, MENA = Middle East & North Africa, NAC = North America, SSA = Sub-Saharan Africa, SAS = South Asia.

Are positive impacts guaranteed?

Of course, no policy works everywhere or all the time. Some lending programs have better designs than others, and firms differ in their ability to turn credit into growth.

To account for this, we also look at what the evidence implies for future SME lending programs. The data suggest that:

• There is about a 90 percent chance that a new program will increase employment.
• There is an 80+ percent chance that it will increase sales and profits.

Negative effects are possible but unlikely. Overall, the evidence strongly favors positive impacts.
 

Do design details matter?

Policy makers often focus on questions such as whether loans should be guaranteed, whether programs work better in richer countries, or whether they mainly help smaller or larger firms. One surprising result from our analysis is how similar the effects are across many of these dimensions.

For employment, we find broadly comparable impacts across the following:

• Guaranteed and non‑guaranteed loans
• High‑income and developing countries
• Smaller and larger SMEs.

This suggests that formal lending programs can support SME growth across a wide range of contexts, not just in specific environments or for narrowly targeted firms.
 

Public banks versus private banks: An important distinction

One dimension where we see a meaningful difference is who provides the loan.

Loans issued by public financial institutions show larger employment effects than loans issued by private banks. On average, employment gains are roughly twice as large when credit comes from public lenders.

A likely explanation lies in incentives. Private banks are profit‑maximizing institutions. Even when supported by public funds or guarantees, they may prefer lending to safer firms: those with existing credit histories, collateral, or scale. As a result, loans may not reach the most credit‑constrained SMEs, where returns to capital are highest.

By contrast, public banks may be in a better position, or more willing, to lend to these constrained firms, generating larger impacts on employment and growth.
 

Public banks are not a quick fix

Our findings do not mean that lending should always be routed through public banks. Public financial institutions can face serious challenges, including inefficiencies, weak governance, and political capture, especially in low‑capacity settings.

The key lesson is that there is a trade-off:

• Private banks may be efficient but conservative in reaching riskier, high‑impact firms.
• Public banks may achieve higher development impact but face governance risks.

Rather than choosing one model over the other, policy makers can aim for better alignment of incentives, for example by:

• Improving credit registries and collateral systems
• Increasing competition in the banking sector
• Designing performance‑based incentives that reward lenders for reaching underserved SMEs.
  

What does this mean for policy?

Three lessons stand out from the global evidence:

1. Formal SME loans work. On average, they increase employment, sales, and profits.
2. Impact is robust across contexts. The results are similar across countries, firm sizes, and loan types.
3. Incentives matter. Who lends, and under what incentives, shapes the extent of the impact loans generate.

Source: blogs.worldbank.org