This study aims to investigate the existence of a non-linear relationship between economic growth and inflation in a group of Egypt, Tunisia, Algeria and Morocco, in addition to estimating the inflation threshold in these economies, which are very similar in their productive structures, and sufficient and related data are available for them. The study used panel data for the period 1970-2021, obtained from the World Bank database published on the Internet. Methodologically, a discrete threshold estimation method was used, which estimates this threshold using the fixed-effects method. The results showed that a non- linear relationship could be captured between economic growth and inflation in these countries combined, and it was found that there is only one threshold for inflation. The inflation-growth threshold was estimated at 14.153%. As the relationship between inflation and growth will be positive if inflation is below the threshold and inverse if inflation is above the threshold. The study recommends that economic policy makers in these countries follow monetary and fiscal policies that lead to the inflation rates not moving away from the estimated threshold.