diff --git a/execution/engine/execution_engine.go b/execution/engine/execution_engine.go
index 5c03e926a1..27c7a46df1 100644
--- a/execution/engine/execution_engine.go
+++ b/execution/engine/execution_engine.go
@@ -53,10 +53,6 @@ func (e *internalExecutionContext) setVariables(variables []byte) {
 	}
 }
 
-func (e *internalExecutionContext) reset() {
-	e.resolveContext.Free()
-}
-
 type ExecutionEngine struct {
 	logger                   abstractlogger.Logger
 	config                   Configuration
@@ -238,7 +234,7 @@ func (e *ExecutionEngine) Execute(ctx context.Context, operation *graphql.Reques
 			return err
 		}
 		if resp != nil {
-			operation.ComputeActualCost(costCalculator, e.config.plannerConfig, resp.ActualListSizes)
+			operation.ComputeActualCost(costCalculator, e.config.plannerConfig, execContext.resolveContext.ActualListSizes)
 		}
 		return nil
 	case *plan.SubscriptionResponsePlan:
diff --git a/v2/pkg/engine/resolve/context.go b/v2/pkg/engine/resolve/context.go
index dfa481b281..0b3e626f1b 100644
--- a/v2/pkg/engine/resolve/context.go
+++ b/v2/pkg/engine/resolve/context.go
@@ -45,6 +45,11 @@ type Context struct {
 
 	SubgraphHeadersBuilder SubgraphHeadersBuilder
 
+	// ActualListSizes is populated by the resolver after resolution completes,
+	// before the response body is written. Maps JSON path to actual list size.
+	// Used to compute the actual cost.
+	ActualListSizes map[string]int
+
 	// GetDeduplicationData is called after the leader of an inbound singleflight request
 	// finishes resolving. It extracts data from the leader's context (e.g. accumulated
 	// response headers) that should be shared with all follower requests.
@@ -315,6 +320,7 @@ func (c *Context) Free() {
 	c.LoaderHooks = nil
 	c.GetDeduplicationData = nil
 	c.SetDeduplicationData = nil
+	c.ActualListSizes = nil
 }
 
 type traceStartKey struct{}
diff --git a/v2/pkg/engine/resolve/resolve.go b/v2/pkg/engine/resolve/resolve.go
index 6ce431b50a..f735752ef9 100644
--- a/v2/pkg/engine/resolve/resolve.go
+++ b/v2/pkg/engine/resolve/resolve.go
@@ -319,10 +319,6 @@ type GraphQLResolveInfo struct {
 
 	// ResolveDeduplicated indicates whether the resolution of the entire operation was deduplicated via single flight
 	ResolveDeduplicated bool
-
-	// ActualListSizes maps the JSON path to the actual list size in the response.
-	// Used to compute the actual cost.
-	ActualListSizes map[string]int
 }
 
 func (r *Resolver) ResolveGraphQLResponse(ctx *Context, response *GraphQLResponse, data []byte, writer io.Writer) (*GraphQLResolveInfo, error) {
@@ -354,7 +350,7 @@ func (r *Resolver) ResolveGraphQLResponse(ctx *Context, response *GraphQLRespons
 		return nil, err
 	}
 
-	resp.ActualListSizes = t.resolvable.actualListSizes
+	ctx.ActualListSizes = t.resolvable.actualListSizes
 
 	return resp, err
 }
@@ -415,6 +411,7 @@ func (r *Resolver) ArenaResolveGraphQLResponse(ctx *Context, response *GraphQLRe
 		r.responseBufferPool.Release(responseArena)
 		return nil, err
 	}
+	ctx.ActualListSizes = t.resolvable.actualListSizes
 
 	// first release resolverArena
 	// all data is resolved and written into the response arena
@@ -436,9 +433,6 @@ func (r *Resolver) ArenaResolveGraphQLResponse(ctx *Context, response *GraphQLRe
 	// all data is written to the client
 	// we're safe to release our buffer
 	r.responseBufferPool.Release(responseArena)
-
-	resp.ActualListSizes = t.resolvable.actualListSizes
-
 	return resp, err
 }