Purpose
Social work clients often face complex financial problems. We have developed a financial social work intervention, FinSoc, to increase financial literacy and economic self-efficacy and reduce financial anxiety among parents with financial problems in Finland. The aim of this pilot randomized controlled trial is to explore the feasibility, acceptability, and preliminary effectiveness of the intervention. This paper, a study protocol, describes the design and implementation of the trial. Study protocols are articles detailing a priori the research plan, rationale, proposed methods and plans for how a clinical trial will be conducted.

Method
This study is a pilot randomized controlled trial with a mixed methods approach applying both quantitative measures and qualitative interviews. Participating social work clients with children are randomly assigned to either the treatment or the waiting list control group at a ratio of 1:1. The treatment group receives the intervention and the control group receives services as usual. The quantitative data from social work clients are collected at three measurement points. Qualitative interviews are conducted post-intervention with both clients receiving, and professionals implementing the intervention. The feasibility is assessed through recruitment and retention rates and the interviews with social work professionals providing the intervention. Acceptability is assessed through feedback from participants on satisfaction with the intervention and usefulness of the specific intervention components. Potential effectiveness is measured by financial literacy, economic self-efficacy and financial anxiety.

Discussion
The intervention is hypothesized to increase financial literacy and economic self-efficacy and reduce financial anxiety among social work clients with children. The results of this pilot study will increase the evidence base of financial social work and offer new insights for developing interventions for clients experiencing financial difficulties.