diff --git a/include/update.h b/include/update.h
index 77a2305d..8a2c2a4a 100644
--- a/include/update.h
+++ b/include/update.h
@@ -39,9 +39,11 @@
 #define IMPORT	0
 #define EXPORT	1
 
-#define SCT_EFFIC (SCT_TYPE_MAX + 1)
-#define SCT_MAINT (SCT_TYPE_MAX + 2)
-#define SCT_BUDG_MAX SCT_MAINT
+enum {
+    BUDG_SCT_BUILD,
+    BUDG_SCT_MAINT,
+    BUDG_BLD_MAX = BUDG_SCT_MAINT
+};
 
 struct budg_item {
     int money;			/* money delta */
@@ -50,6 +52,10 @@ struct budg_item {
 
 /* A nation's budget for an update */
 struct budget {
+    /* production by sector type */
+    struct budg_item prod[SCT_TYPE_MAX + 1];
+    /* building and maintenance */
+    struct budg_item bm[BUDG_BLD_MAX + 1];
     /* military payroll */
     struct budg_item mil;
 };
@@ -135,7 +141,7 @@ extern double buildeff(struct sctstr *);
 extern void do_fallout(struct sctstr *, int);
 extern void spread_fallout(struct sctstr *, int);
 extern void decay_fallout(struct sctstr *, int);
-extern void produce_sect(struct natstr *, int, struct bp *, int[][2]);
+extern void produce_sect(struct natstr *, int, struct bp *);
 /* ship.c */
 extern int prod_ship(int, int, struct bp *, int);
 
diff --git a/src/lib/commands/budg.c b/src/lib/commands/budg.c
index af6957e1..ddb1bd1b 100644
--- a/src/lib/commands/budg.c
+++ b/src/lib/commands/budg.c
@@ -42,7 +42,7 @@
 #include "product.h"
 #include "update.h"
 
-static struct budget *calc_all(int (*p_sect)[2], int *taxes, int *Ncivs,
+static struct budget *calc_all(int *taxes, int *Ncivs,
 		     int *Nuws, int *bars, int *Nbars,
 		     int *ships, int *sbuild, int *nsbuild, int *smaint,
 		     int *units, int *lbuild, int *nlbuild, int *lmaint,
@@ -53,7 +53,6 @@ int
 budg(void)
 {
     int i;
-    int p_sect[SCT_BUDG_MAX+1][2];
     int taxes, Ncivs, Nuws, bars, Nbars;
     int ships, sbuild, nsbuild, smaint;
     int units, lbuild, nlbuild, lmaint;
@@ -67,8 +66,7 @@ budg(void)
     np = getnatp(player->cnum);
 
     player->simulation = 1;
-    budget = calc_all(p_sect,
-		      &taxes, &Ncivs, &Nuws, &bars, &Nbars,
+    budget = calc_all(&taxes, &Ncivs, &Nuws, &bars, &Nbars,
 		      &ships, &sbuild, &nsbuild, &smaint,
 		      &units, &lbuild, &nlbuild, &lmaint,
 		      &planes, &pbuild, &npbuild, &pmaint);
@@ -78,17 +76,18 @@ budg(void)
     expenses = 0;
     pr("Sector Type\t\t\tProduction\t\t\t    Cost\n");
     for (i = 0; i <= SCT_TYPE_MAX; i++) {
-	if (!p_sect[i][1])
+	if (!budget->prod[i].money)
 	    continue;
 	pr("%-17s\t\t", dchr[i].d_name);
 	if (i == SCT_ENLIST)
-	    pr("%d mil    \t", p_sect[i][0]);
+	    pr("%d mil    \t", budget->prod[i].count);
 	else if (dchr[i].d_prd >= 0)
-	    pr("%d %-7s\t", p_sect[i][0], pchr[dchr[i].d_prd].p_sname);
+	    pr("%d %-7s\t", budget->prod[i].count,
+	       pchr[dchr[i].d_prd].p_sname);
 	else
 	    pr("\t\t");
-	pr("\t\t%8d\n", p_sect[i][1]);
-	expenses += p_sect[i][1];
+	pr("\t\t%8d\n", -budget->prod[i].money);
+	expenses -= budget->prod[i].money;
     }
 
     if (sbuild) {
@@ -126,19 +125,21 @@ budg(void)
 	expenses += -lmaint;
     }
 
-    if (p_sect[SCT_EFFIC][1]) {
-	sprintf(buf, "%d sector%s",
-		p_sect[SCT_EFFIC][0], splur(p_sect[SCT_EFFIC][0]));
+    if (budget->bm[BUDG_SCT_BUILD].money) {
+	snprintf(buf, sizeof(buf), "%d sector%s",
+		 budget->bm[BUDG_SCT_BUILD].count,
+		 splur(budget->bm[BUDG_SCT_BUILD].count));
 	pr("Sector building\t\t\t%-16s\t\t%8d\n",
-	   buf, p_sect[SCT_EFFIC][1]);
-	expenses += p_sect[SCT_EFFIC][1];
+	   buf, -budget->bm[BUDG_SCT_BUILD].money);
+	expenses -= budget->bm[BUDG_SCT_BUILD].money;
     }
-    if (p_sect[SCT_MAINT][0]) {
-	sprintf(buf, "%d sector%s",
-		p_sect[SCT_MAINT][0], splur(p_sect[SCT_MAINT][0]));
+    if (budget->bm[BUDG_SCT_MAINT].count) {
+	snprintf(buf, sizeof(buf), "%d sector%s",
+		 budget->bm[BUDG_SCT_MAINT].count,
+		 splur(budget->bm[BUDG_SCT_MAINT].count));
 	pr("Sector maintenance\t\t%-16s\t\t%8d\n",
-	   buf, p_sect[SCT_MAINT][1]);
-	expenses += p_sect[SCT_MAINT][1];
+	   buf, -budget->bm[BUDG_SCT_MAINT].money);
+	expenses -= budget->bm[BUDG_SCT_MAINT].money;
     }
     if (budget->mil.money) {
 	snprintf(buf, sizeof(buf), "%d mil, %d res",
@@ -172,8 +173,7 @@ budg(void)
 }
 
 static struct budget *
-calc_all(int p_sect[][2],
-	 int *taxes, int *Ncivs, int *Nuws, int *bars, int *Nbars,
+calc_all(int *taxes, int *Ncivs, int *Nuws, int *bars, int *Nbars,
 	 int *ships, int *sbuild, int *nsbuild, int *smaint,
 	 int *units, int *lbuild, int *nlbuild, int *lmaint,
 	 int *planes, int *pbuild, int *npbuild, int *pmaint)
@@ -187,7 +187,6 @@ calc_all(int p_sect[][2],
     int etu = etu_per_update;
 
     memset(nat_budget, 0, sizeof(nat_budget));
-    memset(p_sect, 0, sizeof(**p_sect) * (SCT_BUDG_MAX+1) * 2);
     *taxes = *Ncivs = *Nuws = *bars = *Nbars = 0;
     *ships = *sbuild = *nsbuild = *smaint = 0;
     *units = *lbuild = *nlbuild = *lmaint = 0;
@@ -229,7 +228,7 @@ calc_all(int p_sect[][2],
     *lmaint = lnd_money[player->cnum];
 
     /* Produce */
-    produce_sect(np, etu, bp, p_sect);
+    produce_sect(np, etu, bp);
 
     /* Build ships */
     sea_money[player->cnum] = 0;
diff --git a/src/lib/update/main.c b/src/lib/update/main.c
index ceff5c0a..5975f1da 100644
--- a/src/lib/update/main.c
+++ b/src/lib/update/main.c
@@ -105,9 +105,6 @@ update_main(void)
     logerror("done preparing sectors.");
     logerror("producing for countries...");
     for (i = 0; i < MAXNOC; i++) {
-	int p_sect[SCT_BUDG_MAX+1][2];
-
-	memset(p_sect, 0, sizeof(p_sect));
 	if (!(np = getnatp(i)))
 	    continue;
 	if (np->nat_stat == STAT_SANCT) {
@@ -120,7 +117,7 @@ update_main(void)
 	prod_land(etu, i, NULL, 0);
 
 	/* produce all sects */
-	produce_sect(np, etu, NULL, p_sect);
+	produce_sect(np, etu, NULL);
 
 	/* build units */
 	prod_ship(etu, i, NULL, 1);
diff --git a/src/lib/update/sect.c b/src/lib/update/sect.c
index ac0a818e..e36eb8c2 100644
--- a/src/lib/update/sect.c
+++ b/src/lib/update/sect.c
@@ -223,8 +223,9 @@ decay_fallout(struct sctstr *sp, int etus)
  * Produce for a specific nation
  */
 void
-produce_sect(struct natstr *np, int etu, struct bp *bp, int p_sect[][2])
+produce_sect(struct natstr *np, int etu, struct bp *bp)
 {
+    struct budget *budget = &nat_budget[np->nat_cnum];
     struct sctstr *sp, scratch_sect;
     int cost, ecost, pcost;
     int n, amount;
@@ -265,8 +266,8 @@ produce_sect(struct natstr *np, int etu, struct bp *bp, int p_sect[][2])
 
 	if (dchr[sp->sct_type].d_maint) {
 	    cost = etu * dchr[sp->sct_type].d_maint;
-	    p_sect[SCT_MAINT][0]++;
-	    p_sect[SCT_MAINT][1] += cost;
+	    budget->bm[BUDG_SCT_MAINT].count++;
+	    budget->bm[BUDG_SCT_MAINT].money -= cost;
 	    if (!player->simulation)
 		np->nat_money -= cost;
 	}
@@ -274,16 +275,17 @@ produce_sect(struct natstr *np, int etu, struct bp *bp, int p_sect[][2])
 	if ((sp->sct_effic < 100 || sp->sct_type != sp->sct_newtype) &&
 	    np->nat_money >= 0) {
 	    cost = roundavg(buildeff(sp));
-	    p_sect[SCT_EFFIC][0]++;
-	    p_sect[SCT_EFFIC][1] += cost;
+	    budget->bm[BUDG_SCT_BUILD].count++;
+	    budget->bm[BUDG_SCT_BUILD].money -= cost;
 	    if (!player->simulation)
 		np->nat_money -= cost;
 	}
 
 	if (sp->sct_type == SCT_ENLIST && sp->sct_effic >= 60 &&
 	    sp->sct_own == sp->sct_oldown) {
-	    p_sect[sp->sct_type][0] += enlist(sp->sct_item, etu, &ecost);
-	    p_sect[sp->sct_type][1] += ecost;
+	    budget->prod[sp->sct_type].count
+		+= enlist(sp->sct_item, etu, &ecost);
+	    budget->prod[sp->sct_type].money -= ecost;
 	    if (!player->simulation)
 		np->nat_money -= ecost;
 	}
@@ -298,8 +300,8 @@ produce_sect(struct natstr *np, int etu, struct bp *bp, int p_sect[][2])
 	}
 
 	bp_set_from_sect(bp, sp);
-	p_sect[sp->sct_type][0] += amount;
-	p_sect[sp->sct_type][1] += pcost;
+	budget->prod[sp->sct_type].count += amount;
+	budget->prod[sp->sct_type].money -= pcost;
 	if (!player->simulation)
 	    np->nat_money -= pcost;
     }