diff --git a/frontend/src/__tests__/fixtures/pricing.ts b/frontend/src/__tests__/fixtures/pricing.ts
new file mode 100644
index 0000000..19c9bcb
--- /dev/null
+++ b/frontend/src/__tests__/fixtures/pricing.ts
@@ -0,0 +1,20 @@
+/** TECH-SPEC §8 TV-8 pricing fixture. */
+export function tv8Fixture(): {
+  bdft: number;
+  pricePerBdft: number;
+  expectedRecommended: number;
+  overridePrice: number;
+  expectedOverride: number;
+  manualPriceNoRule: number;
+  expectedManual: number;
+} {
+  return {
+    bdft: 0.96,
+    pricePerBdft: 12.50,
+    expectedRecommended: 12.00,
+    overridePrice: 150.00,
+    expectedOverride: 150.00,
+    manualPriceNoRule: 99.99,
+    expectedManual: 99.99,
+  };
+}
diff --git a/frontend/src/__tests__/fixtures/thicknessBand.ts b/frontend/src/__tests__/fixtures/thicknessBand.ts
new file mode 100644
index 0000000..dbfbadb
--- /dev/null
+++ b/frontend/src/__tests__/fixtures/thicknessBand.ts
@@ -0,0 +1,11 @@
+/** TECH-SPEC §8 TV-9 mock taxonomy fixture for thickness attribute. */
+import type { ThicknessRange } from "../../../lib/pipeline/thicknessBand.js";
+
+/** Mock Woo thickness attribute terms (synced from store). */
+export function mockThicknessRanges(): ThicknessRange[] {
+  return [
+    { wooId: 101, label: '3/4"–1"', minIn: 0.75, maxIn: 1.0 },
+    { wooId: 102, label: '1"–1 1/2"', minIn: 1.0, maxIn: 1.5 },
+    { wooId: 103, label: '1 1/2"–2"', minIn: 1.5, maxIn: 2.0 },
+  ];
+}
diff --git a/frontend/src/__tests__/tv8-pricing.test.ts b/frontend/src/__tests__/tv8-pricing.test.ts
new file mode 100644
index 0000000..df7cb64
--- /dev/null
+++ b/frontend/src/__tests__/tv8-pricing.test.ts
@@ -0,0 +1,60 @@
+import { describe, expect, it } from "vitest";
+import { computeRecommendedPrice, computeSlabPrice } from "../lib/pipeline/pricing.js";
+import { tv8Fixture } from "./fixtures/pricing.js";
+
+describe("TV-8 Pricing", () => {
+  const fx = tv8Fixture();
+
+  describe("computeRecommendedPrice", () => {
+    it("bdft × price_per_bdft rounds to expected recommended price", () => {
+      const rec = computeRecommendedPrice(fx.bdft, fx.pricePerBdft);
+      expect(rec).toBe(fx.expectedRecommended);
+      expect(rec).toBe(12.00);
+    });
+
+    it("0 bdft yields 0", () => {
+      expect(computeRecommendedPrice(0, 99.99)).toBe(0);
+    });
+  });
+
+  describe("computeSlabPrice — with pricing rule", () => {
+    it("recommended price pre-fills when no override", () => {
+      const result = computeSlabPrice(fx.bdft, {
+        species: "Walnut",
+        pricePerBdft: fx.pricePerBdft,
+      });
+
+      expect(result.recommendedPrice).toBe(fx.expectedRecommended);
+      expect(result.finalPrice).toBe(fx.expectedRecommended);
+      expect(result.priceSource).toBe("recommendation");
+    });
+
+    it("user override stored as rounded override price", () => {
+      const result = computeSlabPrice(fx.bdft, {
+        species: "Walnut",
+        pricePerBdft: fx.pricePerBdft,
+      }, fx.overridePrice);
+
+      expect(result.recommendedPrice).toBe(fx.expectedRecommended);
+      expect(result.finalPrice).toBe(fx.expectedOverride);
+      expect(result.priceSource).toBe("override");
+    });
+  });
+
+  describe("computeSlabPrice — no pricing rule", () => {
+    it("recommended price is null, manual price stored", () => {
+      const result = computeSlabPrice(fx.bdft, undefined, fx.manualPriceNoRule);
+
+      expect(result.recommendedPrice).toBeNull();
+      expect(result.finalPrice).toBe(fx.expectedManual);
+      expect(result.priceSource).toBe("override");
+    });
+
+    it("manual price rounds half-up to 2 decimals", () => {
+      const result = computeSlabPrice(fx.bdft, undefined, 12.345);
+
+      expect(result.finalPrice).toBe(12.35);
+      expect(result.priceSource).toBe("override");
+    });
+  });
+});
diff --git a/frontend/src/__tests__/tv9-thickness-band.test.ts b/frontend/src/__tests__/tv9-thickness-band.test.ts
new file mode 100644
index 0000000..5c792ec
--- /dev/null
+++ b/frontend/src/__tests__/tv9-thickness-band.test.ts
@@ -0,0 +1,55 @@
+import { describe, expect, it } from "vitest";
+import { findThicknessBand } from "../lib/pipeline/thicknessBand.js";
+import { mockThicknessRanges } from "./fixtures/thicknessBand.js";
+
+describe("TV-9 Thickness → Woo range", () => {
+  const ranges = mockThicknessRanges();
+
+  it("1 inch rounds up into 1\"–1 1/2\"", () => {
+    const band = findThicknessBand(1.0, ranges);
+
+    expect(band).toBeDefined();
+    expect(band!.wooId).toBe(102);
+    expect(band!.label).toBe('1"–1 1/2"');
+    expect(band!.minIn).toBe(1.0);
+    expect(band!.maxIn).toBe(1.5);
+  });
+
+  it("0.75 inches maps to 3/4\"–1\"", () => {
+    const band = findThicknessBand(0.75, ranges);
+
+    expect(band).toBeDefined();
+    expect(band!.wooId).toBe(101);
+    expect(band!.label).toBe('3/4"–1"');
+  });
+
+  it("0.875 inches maps to 3/4\"–1\"", () => {
+    const band = findThicknessBand(0.875, ranges);
+
+    expect(band).toBeDefined();
+    expect(band!.wooId).toBe(101);
+  });
+
+  it("1.5 inches maps to 1 1/2\"–2\"", () => {
+    const band = findThicknessBand(1.5, ranges);
+
+    expect(band).toBeDefined();
+    expect(band!.wooId).toBe(103);
+    expect(band!.label).toBe('1 1/2"–2"');
+  });
+
+  it("returns null when no range contains the thickness", () => {
+    const band = findThicknessBand(0.5, ranges);
+    expect(band).toBeNull();
+
+    const band2 = findThicknessBand(2.5, ranges);
+    expect(band2).toBeNull();
+  });
+
+  it("rounds thickness to nearest 1/8\" before matching", () => {
+    const band = findThicknessBand(1.01, ranges);
+
+    expect(band).toBeDefined();
+    expect(band!.wooId).toBe(102);
+  });
+});
diff --git a/frontend/src/lib/pipeline/index.ts b/frontend/src/lib/pipeline/index.ts
index 3ecdfb7..33a2fbb 100644
--- a/frontend/src/lib/pipeline/index.ts
+++ b/frontend/src/lib/pipeline/index.ts
@@ -4,3 +4,5 @@ export * from "./mask.js";
 export * from "./units.js";
 export * from "./axis.js";
 export * from "./crop.js";
+export * from "./pricing.js";
+export * from "./thicknessBand.js";
diff --git a/frontend/src/lib/pipeline/pricing.ts b/frontend/src/lib/pipeline/pricing.ts
new file mode 100644
index 0000000..d60e13f
--- /dev/null
+++ b/frontend/src/lib/pipeline/pricing.ts
@@ -0,0 +1,91 @@
+import { INCH_STEP, PRICE_DECIMALS } from "./constants.js";
+
+/** Pricing rule synced from WooCommerce (leaf species). */
+export interface PricingRule {
+  species: string;
+  pricePerBdft: number;
+}
+
+/** Result of pricing computation for a slab. */
+export interface PricingResult {
+  /** Recommended price from the pricing rule, or null when no rule exists. */
+  recommendedPrice: number | null;
+  /** The price to store (rounded half-up to 2 decimals). */
+  finalPrice: number;
+  /** Where the stored price came from. */
+  priceSource: "recommendation" | "override";
+}
+
+/**
+ * TECH-SPEC §6 pricing: bdft × price_per_bdft, rounded half-up to 2 decimals.
+ *
+ * @param bdft  — board feet (2 decimals, already rounded by caller)
+ * @param pricePerBdft  — species price per board foot from Settings
+ * @returns recommended price rounded to 2 decimals
+ */
+export function computeRecommendedPrice(
+  bdft: number,
+  pricePerBdft: number,
+): number {
+  const factor = 10 ** PRICE_DECIMALS;
+  return Math.floor(Math.round(bdft * pricePerBdft * 100) / 100 * factor + 0.5) / factor;
+}
+
+/**
+ * TECH-SPEC §6 pricing with override and missing-rule handling.
+ *
+ * Three paths:
+ * 1. Has rule, no override → recommended price, source "recommendation"
+ * 2. Has rule, override → override stored, source "override"
+ * 3. No rule, manual price → manual stored, source "override"
+ *
+ * @param bdft — board feet (2 decimals)
+ * @param pricingRule — pricing rule for the species, or undefined if none
+ * @param userOverride — manual price entered by the user, if any
+ * @returns pricing result with recommended price, final stored price, and source
+ */
+export function computeSlabPrice(
+  bdft: number,
+  pricingRule?: PricingRule,
+  userOverride?: number,
+): PricingResult {
+  const recommendedPrice =
+    pricingRule != null
+      ? computeRecommendedPrice(bdft, pricingRule.pricePerBdft)
+      : null;
+
+  if (userOverride != null) {
+    return {
+      recommendedPrice,
+      finalPrice: roundPrice(userOverride),
+      priceSource: "override",
+    };
+  }
+
+  if (recommendedPrice != null) {
+    return {
+      recommendedPrice,
+      finalPrice: recommendedPrice,
+      priceSource: "recommendation",
+    };
+  }
+
+  // No rule, no override — this should not happen at publish,
+  // but return a valid shape with null recommended and 0 final.
+  return {
+    recommendedPrice: null,
+    finalPrice: 0,
+    priceSource: "override",
+  };
+}
+
+/** Round price half-up to 2 decimals. */
+function roundPrice(price: number): number {
+  if (!Number.isFinite(price)) {
+    return price;
+  }
+  const factor = 10 ** PRICE_DECIMALS;
+  const scaled = Math.abs(price) * factor;
+  const rounded = Math.floor(scaled + 0.5) / factor;
+  return price < 0 ? -rounded : rounded;
+}
diff --git a/frontend/src/lib/pipeline/thicknessBand.ts b/frontend/src/lib/pipeline/thicknessBand.ts
new file mode 100644
index 0000000..52d5394
--- /dev/null
+++ b/frontend/src/lib/pipeline/thicknessBand.ts
@@ -0,0 +1,47 @@
+import { INCH_STEP } from "./constants.js";
+
+/**
+ * A WooCommerce attribute term for the Thickness attribute.
+ * Each term represents a thickness range (e.g. "1"–1 1/2"").
+ *
+ * The range is half-open: [minIn, maxIn). A thickness equal to minIn
+ * belongs to this range; a thickness equal to maxIn belongs to the
+ * next higher range. This implements the "rounds up" rule from
+ * TECH-SPEC §2: "Thickness Woo attribute — same pick, rounded UP
+ * into a Woo range."
+ */
+export interface ThicknessRange {
+  wooId: number;
+  /** Display label from Woo, e.g. '1"–1 1/2"'. */
+  label: string;
+  /** Lower bound in inches (inclusive). */
+  minIn: number;
+  /** Upper bound in inches (exclusive). */
+  maxIn: number;
+}
+
+/**
+ * Find the Woo thickness range that a given thickness rounds up into.
+ *
+ * The thickness is first rounded to the nearest 1/8" step, then matched
+ * against the half-open ranges [minIn, maxIn). If the thickness falls
+ * below the lowest range or above the highest, null is returned.
+ *
+ * @param thicknessIn — thickness in inches (1/8" steps)
+ * @param ranges — sorted thickness ranges from Woo attribute sync
+ * @returns the matching range, or null if no range contains the value
+ */
+export function findThicknessBand(
+  thicknessIn: number,
+  ranges: ThicknessRange[],
+): ThicknessRange | null {
+  const rounded = Math.round(thicknessIn / INCH_STEP) * INCH_STEP;
+
+  for (const range of ranges) {
+    if (rounded >= range.minIn && rounded < range.maxIn) {
+      return range;
+    }
+  }
+
+  return null;
+}