The study examined the relationship between self-, peer- and test-estimated intelligence, academic self-concept and academic achievement. Subjective evaluations of intelligence and academic self-concept had incremental predictive value over conventional intelligence when predicting achievement accounting for more than 40% of its variance. The obtained pattern of results is presented via SEM-model which accounts for 75% variance in the latent factor of academic achievement. Author suggests the importance of further studying complex sets of achievement predictors from ability, personality and mediating domains.