diff --git a/math/Makefile b/math/Makefile
index 42e9839c877f..63b43e211fd9 100644
--- a/math/Makefile
+++ b/math/Makefile
@@ -130,6 +130,7 @@
     SUBDIR += R-cran-quantreg
     SUBDIR += R-cran-raster
     SUBDIR += R-cran-recipes
+    SUBDIR += R-cran-reformulas
     SUBDIR += R-cran-rgenoud
     SUBDIR += R-cran-robustbase
     SUBDIR += R-cran-sandwich
diff --git a/math/R-cran-reformulas/Makefile b/math/R-cran-reformulas/Makefile
new file mode 100644
index 000000000000..f082fbcdc75f
--- /dev/null
+++ b/math/R-cran-reformulas/Makefile
@@ -0,0 +1,18 @@
+PORTNAME=	reformulas
+DISTVERSION=	0.4.0
+CATEGORIES=	math
+DISTNAME=	${PORTNAME}_${DISTVERSION}
+
+MAINTAINER=	eduardo@FreeBSD.org
+COMMENT=	Machinery for Processing Random Effect Formulas
+WWW=		https://cran.r-project.org/web/packages/reformulas/
+
+LICENSE=	GPLv3
+
+CRAN_DEPENDS=	R-cran-Rdpack>0:devel/R-cran-Rdpack
+BUILD_DEPENDS=	${CRAN_DEPENDS}
+RUN_DEPENDS=	${CRAN_DEPENDS}
+
+USES=		cran:auto-plist
+
+.include <bsd.port.mk>
diff --git a/math/R-cran-reformulas/distinfo b/math/R-cran-reformulas/distinfo
new file mode 100644
index 000000000000..b2d1e5b24bc2
--- /dev/null
+++ b/math/R-cran-reformulas/distinfo
@@ -0,0 +1,3 @@
+TIMESTAMP = 1736686591
+SHA256 (reformulas_0.4.0.tar.gz) = 044fd9b9e5e8aaec2076ef8aa49c724ddf1ae6fa78bd5946a2bd94a1826abf34
+SIZE (reformulas_0.4.0.tar.gz) = 32012
diff --git a/math/R-cran-reformulas/pkg-descr b/math/R-cran-reformulas/pkg-descr
new file mode 100644
index 000000000000..bb9465219335
--- /dev/null
+++ b/math/R-cran-reformulas/pkg-descr
@@ -0,0 +1,6 @@
+reformulas (random effects formulas) is a utility package for
+processing "lme4-style" random effects formulas in R (i.e.,
+formulas where the random effects are included in the form (f|g)
+as components of an overall model formula, where f represents a
+sub-formula for the varying effects and g represents a sub-formula
+for the grouping variable(s).