PurposeThe purpose of this study is to empirically examine the effect of marketing modification on business performance from the perspective of marketing capabilities theory.Design/methodology/approachThis study employed a survey method to collect data from 225 food processing small- and medium-sized enterprises (SMEs) on the Ghana Enterprise Agency (GEA) registered list in the Eastern Region of Ghana. The effect of marketing modification on the performance of SMEs in the food processing industry was evaluated using a structural equation modeling (SEM) – path analysis.FindingsAccording to the study’s findings, marketing modification has a positive and significant impact on the financial performance (FP), customer performance (CP), internal business process performance (IBPP) and learning and growth performance (LGP) of Ghanaian SMEs engaged in food processing. The results of this study also demonstrated the importance of marketing modification determinants, such as marketing resources (MR), cross-functional and interenterprise collaboration (CFIEC), architectural marketing capability (AMC) and marketing strategy decision implementation (MSDI), in achieving food processing SME performance in Ghana.Research limitations/implicationsThis current research has its limitation, even though its importance has been mentioned earlier. First, the study can be improved by expanding the sample size through the inclusion of other SMEs from other industries since it is industry specific (i.e. food processing SME). Second, this current study was conducted in Ghana. To compare results, the current study may be replicated in other emerging countries. Third, future research studies may consider how business environmental factors such as technological change (e.g. use of artificial intelligence and machine learning) moderate the relationship between marketing modification and SME performance.Practical implicationsThe outcomes of this research study are anticipated to give profitable implications to both academicians and practitioners. For the academic aspect, this study provides an important contribution to marketing modification and performance literature by examining the impact of innovative marketing on the performance of food processing SMEs in Ghana. For practitioners, this study indicates that food processing SME owners/managers must focus on marketing modification to develop their performance. The increase in marketing modification application through marketing capabilities such as MR and CFIEC will enable owners/managers to achieve performance targets.Social implicationsThe application of marketing modification among food processing SMEs in Ghana will contribute greatly to their profitability, survival and growth. The growth and survival of food processing SMEs (not limited to food processing SMEs) in Ghana will help in the control of unemployment, which is a major social issue in Ghana.Originality/valueThe study’s findings provide solid support for the marketing capabilities theory. This study also supports the notion that food processing SMEs should perceive marketing modification and its determinants (i.e. MR, CFIEC, AMC and MSDI) as a critical strategic capacity to enhance their performance (i.e. FP, CF, IBPP and LGP). In terms of contribution, this study adds to the body of knowledge already available on marketing modification and business performance, particularly in the setting of an emerging economy.