diff --git a/.env.example b/.env.example
index 0cf3d13..875adf9 100644
--- a/.env.example
+++ b/.env.example
@@ -16,3 +16,8 @@ ORDER_CUTOFF=15:00
 ORDER_ASK_UNTIL=15:30
 ORDER_REMIND_MINUTES=10
 ORDER_EXPIRE_MINUTES=30
+
+# Result PDF fetching (IST): check from START until a draw is stored, give up at END, retry every N minutes
+RESULTS_WINDOW_START=16:00
+RESULTS_WINDOW_END=19:00
+RESULTS_RETRY_MINUTES=10
diff --git a/src/config.test.ts b/src/config.test.ts
index 704fc39..80cf628 100644
--- a/src/config.test.ts
+++ b/src/config.test.ts
@@ -21,6 +21,30 @@ describe('loadConfig', () => {
     expect(c.dbPath).toBe('/tmp/x.db');
   });
 
+  describe('results settings', () => {
+    const base = { SRS_SECRET: 'a'.repeat(20) };
+
+    it('defaults to 16:00-19:00, retry 10', () => {
+      expect(loadConfig(base).results).toEqual({ windowStartMin: 960, windowEndMin: 1140, retryMin: 10 });
+    });
+
+    it('reads overrides', () => {
+      const c = loadConfig({
+        ...base,
+        RESULTS_WINDOW_START: '16:30',
+        RESULTS_WINDOW_END: '20:00',
+        RESULTS_RETRY_MINUTES: '5',
+      });
+      expect(c.results).toEqual({ windowStartMin: 990, windowEndMin: 1200, retryMin: 5 });
+    });
+
+    it('rejects bad format, bad range and bad retry', () => {
+      expect(() => loadConfig({ ...base, RESULTS_WINDOW_START: '4pm' })).toThrow(/HH:MM/);
+      expect(() => loadConfig({ ...base, RESULTS_WINDOW_END: '16:00' })).toThrow(/later than RESULTS_WINDOW_START/);
+      expect(() => loadConfig({ ...base, RESULTS_RETRY_MINUTES: '0' })).toThrow(/RESULTS_RETRY_MINUTES/);
+    });
+  });
+
   describe('order settings', () => {
     const base = { SRS_SECRET: 'a'.repeat(20) };
 
diff --git a/src/config.ts b/src/config.ts
index 55103b7..f4e836c 100644
--- a/src/config.ts
+++ b/src/config.ts
@@ -21,7 +21,14 @@ const schema = z.object({
   ORDER_ASK_UNTIL: hhmm('15:30'),
   ORDER_REMIND_MINUTES: z.coerce.number().int().min(1).max(1440).default(10),
   ORDER_EXPIRE_MINUTES: z.coerce.number().int().min(1).max(1440).default(30),
+  RESULTS_WINDOW_START: hhmm('16:00'),
+  RESULTS_WINDOW_END: hhmm('19:00'),
+  RESULTS_RETRY_MINUTES: z.coerce.number().int().min(1).max(120).default(10),
 })
+  .refine((e) => toMinutes(e.RESULTS_WINDOW_END) > toMinutes(e.RESULTS_WINDOW_START), {
+    path: ['RESULTS_WINDOW_END'],
+    message: 'must be later than RESULTS_WINDOW_START',
+  })
   .refine((e) => toMinutes(e.ORDER_ASK_UNTIL) > toMinutes(e.ORDER_CUTOFF), {
     path: ['ORDER_ASK_UNTIL'],
     message: 'must be later than ORDER_CUTOFF',
@@ -38,6 +45,12 @@ export interface OrderSettings {
   expireMin: number;
 }
 
+export interface ResultsSettings {
+  windowStartMin: number;
+  windowEndMin: number;
+  retryMin: number;
+}
+
 export interface Config {
   port: number;
   host: string;
@@ -47,6 +60,7 @@ export interface Config {
   bridgeUrl: string;
   defaultCountryCode: string;
   orders: OrderSettings;
+  results: ResultsSettings;
 }
 
 export function loadConfig(env: NodeJS.ProcessEnv = process.env): Config {
@@ -75,5 +89,10 @@ export function loadConfig(env: NodeJS.ProcessEnv = process.env): Config {
       remindMin: e.ORDER_REMIND_MINUTES,
       expireMin: e.ORDER_EXPIRE_MINUTES,
     },
+    results: {
+      windowStartMin: toMinutes(e.RESULTS_WINDOW_START),
+      windowEndMin: toMinutes(e.RESULTS_WINDOW_END),
+      retryMin: e.RESULTS_RETRY_MINUTES,
+    },
   };
 }
diff --git a/src/results/scheduler.test.ts b/src/results/scheduler.test.ts
index 288b06d..d6d89c0 100644
--- a/src/results/scheduler.test.ts
+++ b/src/results/scheduler.test.ts
@@ -60,7 +60,34 @@ describe('results scheduler', () => {
     await x.s.tick();
     await x.s.tick();
     expect(x.calls()).toBe(0);
-    expect(x.logs.filter((l) => String(l.msg).includes('by 7 PM'))).toHaveLength(1);
+    expect(x.logs.filter((l) => String(l.msg).includes('by end of window'))).toHaveLength(1);
+  });
+
+  it('honours a custom window and retry interval', async () => {
+    const db = makeDb();
+    let calls = 0;
+    let clock = z('09:59'); // 15:29 IST
+    const s = createResultsScheduler({
+      db,
+      log: () => {},
+      now: () => clock,
+      run: async () => {
+        calls++;
+        return [];
+      },
+      windowStartMin: 15 * 60 + 30,
+      windowEndMin: 15 * 60 + 50,
+      retryMin: 5,
+    });
+    await s.tick();
+    expect(calls).toBe(0);
+    clock = z('10:00'); // 15:30
+    await s.tick();
+    clock = z('10:05');
+    await s.tick();
+    clock = z('10:20'); // 15:50, window over
+    await s.tick();
+    expect(calls).toBe(2);
   });
 
   it('logs a held draw and survives a failing check', async () => {
diff --git a/src/results/scheduler.ts b/src/results/scheduler.ts
index c48e1ea..710a324 100644
--- a/src/results/scheduler.ts
+++ b/src/results/scheduler.ts
@@ -3,13 +3,12 @@ import { runResultsJob, type DrawReport } from './job';
 import { istMinutes } from '../services/ist';
 import { todayIst } from './portal';
 
-const WINDOW_START_MIN = 16 * 60; // 4 PM IST
-const WINDOW_END_MIN = 19 * 60; // 7 PM IST
-const EVERY_MS = 10 * 60_000;
-
 export interface SchedulerOptions {
   db: Db;
   log: (entry: Record<string, unknown>) => void;
+  windowStartMin?: number;
+  windowEndMin?: number;
+  retryMin?: number;
   now?: () => Date;
   run?: (db: Db) => Promise<DrawReport[]>;
 }
@@ -19,6 +18,9 @@ function todaysDrawReady(db: Db, today: string): boolean {
 }
 
 export function createResultsScheduler(opts: SchedulerOptions) {
+  const WINDOW_START_MIN = opts.windowStartMin ?? 16 * 60;
+  const WINDOW_END_MIN = opts.windowEndMin ?? 19 * 60;
+  const EVERY_MS = (opts.retryMin ?? 10) * 60_000;
   const now = opts.now ?? (() => new Date());
   const run = opts.run ?? ((db: Db) => runResultsJob({ db }));
   let lastRunAt = 0;
@@ -33,13 +35,13 @@ export function createResultsScheduler(opts: SchedulerOptions) {
     if (minutes >= WINDOW_END_MIN) {
       if (loggedGiveUpFor !== today && !todaysDrawReady(opts.db, today)) {
         loggedGiveUpFor = today;
-        opts.log({ level: 'warn', msg: 'results: no ready draw for today by 7 PM', date: today });
+        opts.log({ level: 'warn', msg: 'results: no ready draw for today by end of window', date: today });
       }
       return;
     }
     if (minutes < WINDOW_START_MIN || running) return;
     if (todaysDrawReady(opts.db, today)) return;
-    if (t.getTime() - lastRunAt < EVERY_MS - 30_000) return;
+    if (t.getTime() - lastRunAt < Math.max(0, EVERY_MS - 30_000)) return;
 
     running = true;
     lastRunAt = t.getTime();
diff --git a/src/server.ts b/src/server.ts
index 2342678..b5f5a66 100644
--- a/src/server.ts
+++ b/src/server.ts
@@ -22,7 +22,11 @@ async function main(): Promise<void> {
   const app = createApp({ db, config, bridge, sendQueue }, { logger: true });
   log = (e) => app.log.info(e);
 
-  const stopScheduler = createResultsScheduler({ db, log: (e) => app.log.info(e) }).start();
+  const stopScheduler = createResultsScheduler({
+    db,
+    log: (e) => app.log.info(e),
+    ...config.results,
+  }).start();
   const stopSweeper = createConversationSweeper({
     db,
     settings: config.orders,
diff --git a/src/testing/config.ts b/src/testing/config.ts
index 548c590..4f40a3a 100644
--- a/src/testing/config.ts
+++ b/src/testing/config.ts
@@ -10,6 +10,7 @@ export function testConfig(overrides: Partial<Config> = {}): Config {
     bridgeUrl: 'http://127.0.0.1:3000',
     defaultCountryCode: '91',
     orders: { cutoffMin: 15 * 60, askUntilMin: 15 * 60 + 30, remindMin: 10, expireMin: 30 },
+    results: { windowStartMin: 16 * 60, windowEndMin: 19 * 60, retryMin: 10 },
     ...overrides,
   };
 }