Impact of Religiosity and Financial Literacy on Household Investment Decision: Quasi-Experimental Evidence from Indonesian Muslim Households

In the quiet corners of family life, a constant tug-of-war plays out between spending money today and saving it for tomorrow. This decision is not just about math; it is deeply woven into who we are, what we believe, and what we know about how money works. For Muslim households in Indonesia, this choice carries an added layer of meaning. Their faith encourages them to avoid hoarding wealth and to put resources to productive use, yet it also sets strict boundaries on how that money can be invested. At the same time, understanding the complex world of finance—knowing the difference between a safe savings account and a risky investment—is a skill that not everyone possesses. When these two forces, deep religious conviction and practical financial knowledge, come together, they shape how families build their futures. Understanding this mix is crucial because when households fail to invest wisely, it can lead to broader economic gaps, leaving families vulnerable and the economy less dynamic.

A team of researchers from Padjadjaran University set out to untangle this relationship, asking a simple but profound question: Does being deeply religious make a household more likely to invest, or is it simply knowing how to manage money that matters? To find the answer, they looked at data from thousands of Indonesian families, focusing specifically on Muslim households. They wanted to see if a combination of strong faith and financial smarts led to better investment choices than having just one of those traits, or neither. The researchers treated the data like a carefully controlled experiment, even though they were observing real life rather than running a lab test. They matched families who had both high religiosity and good financial literacy with other families who were similar in age, education, and income but lacked one or both of those traits. This method allowed them to isolate the specific effect of faith and knowledge on the decision to invest, filtering out other factors that might skew the results.

The study revealed a clear and compelling pattern. Households that possessed both strong religious values and a solid grasp of financial concepts were significantly more likely to choose investment over simple consumption. When these families were compared to those who had neither trait, the likelihood of them investing jumped by nearly ten percentage points. This gap remained even when the researchers compared the "faithful and knowledgeable" group to families who were financially savvy but not particularly religious, or to those who were deeply religious but lacked financial knowledge. In every comparison, the combination of the two factors produced the strongest result. It suggests that while faith provides the moral compass to avoid wasteful spending and encourages the circulation of wealth, it is the practical knowledge of how to invest that actually turns that intention into action.

Perhaps the most telling finding was what happened when one of these ingredients was missing. The researchers found that religiosity alone was not enough to drive investment decisions. Families who were deeply religious but lacked financial literacy did not invest at the same rate as those who had both. Without the ability to understand financial instruments, evaluate risks, and navigate the market, even the most devout households tended to hold back, often keeping their money in less productive forms or spending it rather than investing it. Conversely, financial literacy without the guiding framework of religious values also fell short of the combined effect. The data showed that the most effective approach was the synergy of the two: faith provided the motivation to be responsible and productive with wealth, while financial literacy provided the tools to execute that responsibility safely and effectively.

This discovery offers a clear path forward for policymakers and community leaders in Indonesia. The rapid growth of the Islamic finance industry has not yet been matched by a similar rise in household participation, largely because many people simply do not know how to engage with these products. The study suggests that programs designed to boost financial inclusion should not just teach numbers and rules; they should also connect these lessons to the values that already drive these families. By integrating financial education with religious teachings, it may be possible to unlock a new wave of investment that is both economically sound and spiritually fulfilling. The research confirms that to help families build wealth, we must address both the heart and the mind, ensuring that the desire to do good is matched by the ability to do it well.