diff --git a/src/db/schema.ts b/src/db/schema.ts
index bde926b..5079418 100644
--- a/src/db/schema.ts
+++ b/src/db/schema.ts
@@ -259,6 +259,10 @@ export const settings = pgTable("settings", {
 });
 
 // ============ OFFER MACROS ============
+// Phase 12 additive columns (Offer Editor — Tier A/B/C, Tag & Prezzo Pubblico):
+// description, category, ticket, is_archived, and the 5 structured
+// transformation-promise fields (cliente_ideale/risultato/tempo/pain/metodo).
+// transformation_promise (legacy, free-text) stays untouched.
 export const offer_macros = pgTable("offer_macros", {
   id: text("id")
     .primaryKey()
@@ -266,6 +270,16 @@ export const offer_macros = pgTable("offer_macros", {
   internal_name: text("internal_name").notNull(),
   public_name: text("public_name").notNull(),
   transformation_promise: text("transformation_promise"),
+  // Phase 12 additive fields below
+  description: text("description"), // short description shown on offer cards
+  category: text("category"), // single-select "Categoria" (Entry/Signature/Retainer Offer) — OFFER-15/18
+  ticket: text("ticket"), // single-select "Ticket" (Low/Mid/High Ticket) — OFFER-15
+  is_archived: boolean("is_archived").notNull().default(false), // OFFER-18 archive flag
+  cliente_ideale: text("cliente_ideale"), // "Aiuto: [Cliente Ideale]"
+  risultato: text("risultato"), // "A ottenere: [Risultato]"
+  tempo: text("tempo"), // "In: [tempo]"
+  pain: text("pain"), // "Senza: [Pain]"
+  metodo: text("metodo"), // "Grazie a: [Metodo]"
   sort_order: integer("sort_order").notNull().default(0),
   created_at: timestamp("created_at", { withTimezone: true }).notNull().defaultNow(),
 });
@@ -283,6 +297,15 @@ export const offer_micros = pgTable("offer_micros", {
   transformation_promise: text("transformation_promise"),
   duration_months: integer("duration_months").notNull().default(1),
   sort_order: integer("sort_order").notNull().default(0),
+  // Phase 12 additive fields below.
+  // tier_letter: nullable, values constrained to 'A'|'B'|'C' via a CHECK
+  // constraint at the SQL level (migration 0008) — not enforced in Drizzle
+  // (no native CHECK helper in this project's pg-core version); validated in
+  // Zod at the server-action layer (Plan 03).
+  tier_letter: text("tier_letter"),
+  // public_price: manual public price per tier (D-5/OFFER-16), independent of
+  // the computed services total (computed at query time, never stored).
+  public_price: numeric("public_price", { precision: 10, scale: 2 }),
 });
 
 // ============ OFFER SERVICES (distinct from service_catalog — marketing/transformation semantics) ============
@@ -312,6 +335,28 @@ export const offer_micro_services = pgTable(
   })
 );
 
+// ============ OFFER TIER SERVICES (Phase 12 — junction: offer_micros <-> services) ============
+// Additive replacement for the legacy offer_micro_services (which points to the
+// deprecated offer_services table). This junction connects a tier (offer_micros row
+// with tier_letter set) to the unified services catalog (Phase 11). Do NOT modify
+// offer_micro_services — it remains untouched for legacy data.
+export const offer_tier_services = pgTable(
+  "offer_tier_services",
+  {
+    tier_id: text("tier_id")
+      .notNull()
+      .references(() => offer_micros.id, { onDelete: "cascade" }),
+    service_id: text("service_id")
+      .notNull()
+      .references(() => services.id, { onDelete: "cascade" }),
+    created_at: timestamp("created_at", { withTimezone: true }).notNull().defaultNow(),
+  },
+  (t) => ({
+    pk: primaryKey({ columns: [t.tier_id, t.service_id] }),
+    tierIdx: index("offer_tier_services_tier_idx").on(t.tier_id),
+  })
+);
+
 // ============ PROJECT OFFERS (assignment of micro-offer to project) ============
 export const project_offers = pgTable("project_offers", {
   id: text("id")
@@ -549,6 +594,7 @@ export const offerMacrosRelations = relations(offer_macros, ({ many }) => ({
 export const offerMicrosRelations = relations(offer_micros, ({ one, many }) => ({
   macro: one(offer_macros, { fields: [offer_micros.macro_id], references: [offer_macros.id] }),
   services: many(offer_micro_services),
+  tierServices: many(offer_tier_services),
   projectOffers: many(project_offers),
 }));
 
@@ -561,6 +607,11 @@ export const offerMicroServicesRelations = relations(offer_micro_services, ({ on
   service: one(offer_services, { fields: [offer_micro_services.service_id], references: [offer_services.id] }),
 }));
 
+export const offerTierServicesRelations = relations(offer_tier_services, ({ one }) => ({
+  tier: one(offer_micros, { fields: [offer_tier_services.tier_id], references: [offer_micros.id] }),
+  service: one(services, { fields: [offer_tier_services.service_id], references: [services.id] }),
+}));
+
 export const projectOffersRelations = relations(project_offers, ({ one }) => ({
   project: one(projects, { fields: [project_offers.project_id], references: [projects.id] }),
   micro: one(offer_micros, { fields: [project_offers.micro_id], references: [offer_micros.id] }),
@@ -638,6 +689,8 @@ export type OfferService = typeof offer_services.$inferSelect;
 export type NewOfferService = typeof offer_services.$inferInsert;
 export type OfferMicroService = typeof offer_micro_services.$inferSelect;
 export type NewOfferMicroService = typeof offer_micro_services.$inferInsert;
+export type OfferTierService = typeof offer_tier_services.$inferSelect;
+export type NewOfferTierService = typeof offer_tier_services.$inferInsert;
 export type ProjectOffer = typeof project_offers.$inferSelect;
 export type NewProjectOffer = typeof project_offers.$inferInsert;
 export type OfferPhase = typeof offer_phases.$inferSelect;