diff --git a/src/app/(dashboard)/influencers/page.tsx b/src/app/(dashboard)/influencers/page.tsx
index 171a423..63c331d 100644
--- a/src/app/(dashboard)/influencers/page.tsx
+++ b/src/app/(dashboard)/influencers/page.tsx
@@ -40,6 +40,11 @@ import {
   estimateRevenueFromViews,
   formatEstimatedRevenue,
 } from '@/lib/revenue-estimate';
+import {
+  DEFAULT_TAX_PERIOD_DAYS,
+  estimateTaxForPeriod,
+  TAX_PERIOD_OPTIONS,
+} from '@/lib/tax-period-estimate';
 
 const COMPLIANCE_STATUSES = ['compliant', 'non-compliant', 'pending', 'under-review'] as const;
 
@@ -80,6 +85,7 @@ export default function InfluencersPage() {
   );
   const [showAddDialog, setShowAddDialog] = useState(false);
   const [isCreating, setIsCreating] = useState(false);
+  const [taxPeriodDays, setTaxPeriodDays] = useState<number>(DEFAULT_TAX_PERIOD_DAYS);
   const [form, setForm] = useState({
     name: '',
     handle: '',
@@ -154,6 +160,9 @@ export default function InfluencersPage() {
     filtered = filtered.filter((channel) => channel.complianceStatus === filterStatus);
   }
 
+  const selectedTaxPeriod =
+    TAX_PERIOD_OPTIONS.find((option) => option.days === taxPeriodDays) ?? TAX_PERIOD_OPTIONS[0];
+
   const handleCreate = async (event: React.FormEvent<HTMLFormElement>) => {
     event.preventDefault();
     if (!form.name || !form.handle) return;
@@ -261,6 +270,24 @@ export default function InfluencersPage() {
             ))}
           </SelectContent>
         </Select>
+
+        <Select
+          value={String(taxPeriodDays)}
+          onValueChange={(value) => {
+            setTaxPeriodDays(Number(value));
+          }}
+        >
+          <SelectTrigger className='w-full bg-card sm:w-44'>
+            <SelectValue placeholder='Tax period' />
+          </SelectTrigger>
+          <SelectContent>
+            {TAX_PERIOD_OPTIONS.map((option) => (
+              <SelectItem key={option.days} value={String(option.days)}>
+                {option.label}
+              </SelectItem>
+            ))}
+          </SelectContent>
+        </Select>
       </div>
 
       <div className='overflow-hidden rounded-xl border border-border/60 bg-card'>
@@ -298,7 +325,9 @@ export default function InfluencersPage() {
                   </td>
                 </tr>
               ) : (
-                filtered.map((channel) => (
+                filtered.map((channel) => {
+                  const periodTax = estimateTaxForPeriod(channel, taxPeriodDays);
+                  return (
                   <tr
                     key={channel._id}
                     className='border-b border-border/40 align-top transition-colors hover:bg-muted/20'
@@ -370,12 +399,12 @@ export default function InfluencersPage() {
 
                     <td className='px-4 py-4 text-right'>
                       <p className='font-mono text-xs font-medium text-chart-5'>
-                        {channel.estimatedTax !== undefined ? formatCurrency(channel.estimatedTax) : '--'}
+                        {periodTax !== undefined ? formatCurrency(periodTax) : '--'}
                       </p>
                       <p className='mt-1 text-xs text-muted-foreground'>
-                        {channel.taxEstimateSource === 'none'
-                          ? 'No estimate yet'
-                          : formatRevenueSource(channel.taxEstimateSource)}
+                        {periodTax !== undefined
+                          ? `Projected for ${selectedTaxPeriod.label}`
+                          : 'No estimate yet'}
                       </p>
                     </td>
 
@@ -413,7 +442,8 @@ export default function InfluencersPage() {
                       </div>
                     </td>
                   </tr>
-                ))
+                  );
+                })
               )}
             </tbody>
           </table>
diff --git a/src/app/(dashboard)/page.tsx b/src/app/(dashboard)/page.tsx
index 7af2578..847ff7e 100644
--- a/src/app/(dashboard)/page.tsx
+++ b/src/app/(dashboard)/page.tsx
@@ -13,11 +13,24 @@ import {
 import { api } from '~convex/_generated/api';
 
 import Link from 'next/link';
+import { useMemo, useState } from 'react';
 
 import { Button } from '@/components/ui/button';
 import { Card, CardAction, CardContent, CardHeader, CardTitle } from '@/components/ui/card';
+import {
+  Select,
+  SelectContent,
+  SelectItem,
+  SelectTrigger,
+  SelectValue,
+} from '@/components/ui/select';
 import { Skeleton } from '@/components/ui/skeleton';
 import { formatCompactNumber, formatCurrency, formatRevenueSource } from '@/lib/product';
+import {
+  DEFAULT_TAX_PERIOD_DAYS,
+  estimateTaxForPeriod,
+  TAX_PERIOD_OPTIONS,
+} from '@/lib/tax-period-estimate';
 
 function MetricCard({
   label,
@@ -67,12 +80,26 @@ function DashboardSkeleton() {
 }
 
 export default function OverviewPage() {
+  const [taxPeriodDays, setTaxPeriodDays] = useState<number>(DEFAULT_TAX_PERIOD_DAYS);
   const stats = useQuery(api.influencers.getInfluencerStats);
+  const channels = useQuery(api.influencers.getChannels, {});
   const revenueData = useQuery(api.analytics.getRevenueByMonth);
   const topChannels = useQuery(api.analytics.getTopInfluencers);
   const recentLogs = useQuery(api.auditLogs.getRecentLogs, { limit: 5 });
+  const selectedTaxPeriod = useMemo(
+    () => TAX_PERIOD_OPTIONS.find((option) => option.days === taxPeriodDays) ?? TAX_PERIOD_OPTIONS[0],
+    [taxPeriodDays],
+  );
+  const totalTaxForPeriod = useMemo(
+    () =>
+      (channels ?? []).reduce(
+        (sum, channel) => sum + (estimateTaxForPeriod(channel, taxPeriodDays) ?? 0),
+        0,
+      ),
+    [channels, taxPeriodDays],
+  );
 
-  if (stats === undefined) {
+  if (stats === undefined || channels === undefined) {
     return <DashboardSkeleton />;
   }
 
@@ -86,8 +113,8 @@ export default function OverviewPage() {
         />
         <MetricCard
           label='Estimated Tax Output'
-          value={formatCurrency(stats.totalEstimatedTax, { compact: true })}
-          subtitle='Derived separately from public metadata and source inputs'
+          value={formatCurrency(totalTaxForPeriod, { compact: true })}
+          subtitle={`Projected for ${selectedTaxPeriod.label} from available source data`}
           accentClass='text-chart-5'
         />
         <MetricCard
@@ -111,13 +138,30 @@ export default function OverviewPage() {
               Revenue Inputs &amp; Tax Estimates
             </CardTitle>
             <CardAction>
-              <div className='flex gap-2'>
+              <div className='flex flex-wrap items-center gap-2'>
                 <span className='flex items-center gap-1.5 text-[10px] font-medium tracking-wider text-muted-foreground uppercase'>
                   <span className='h-2 w-2 rounded-full bg-[oklch(0.6_0.18_250)]' /> Revenue inputs
                 </span>
                 <span className='flex items-center gap-1.5 text-[10px] font-medium tracking-wider text-muted-foreground uppercase'>
                   <span className='h-2 w-2 rounded-full bg-[oklch(0.65_0.18_150)]' /> Tax estimates
                 </span>
+                <Select
+                  value={String(taxPeriodDays)}
+                  onValueChange={(value) => {
+                    setTaxPeriodDays(Number(value));
+                  }}
+                >
+                  <SelectTrigger className='h-8 w-[110px] text-[10px] tracking-wider uppercase'>
+                    <SelectValue placeholder='Tax period' />
+                  </SelectTrigger>
+                  <SelectContent>
+                    {TAX_PERIOD_OPTIONS.map((option) => (
+                      <SelectItem key={option.days} value={String(option.days)}>
+                        {option.label}
+                      </SelectItem>
+                    ))}
+                  </SelectContent>
+                </Select>
               </div>
             </CardAction>
           </CardHeader>
diff --git a/src/lib/tax-period-estimate.ts b/src/lib/tax-period-estimate.ts
new file mode 100644
index 0000000..37907f5
--- /dev/null
+++ b/src/lib/tax-period-estimate.ts
@@ -0,0 +1,88 @@
+import { estimateRevenueFromViews } from './revenue-estimate';
+
+export const TAX_PERIOD_OPTIONS = [
+  { days: 30, label: '30 days' },
+  { days: 60, label: '60 days' },
+  { days: 90, label: '90 days' },
+  { days: 365, label: '1 year' },
+] as const;
+
+export const DEFAULT_TAX_PERIOD_DAYS = TAX_PERIOD_OPTIONS[0].days;
+const DAYS_IN_YEAR = 365;
+
+// Ghana Revenue Authority progressive personal income tax brackets (annual, GHS).
+const GHA_TAX_BRACKETS: Array<{ limit: number; rate: number }> = [
+  { limit: 5_880, rate: 0 },
+  { limit: 1_320, rate: 0.05 },
+  { limit: 1_560, rate: 0.1 },
+  { limit: 38_000, rate: 0.175 },
+  { limit: 192_000, rate: 0.25 },
+  { limit: 366_240, rate: 0.3 },
+  { limit: Infinity, rate: 0.35 },
+];
+
+function calculateProgressiveTax(
+  income: number,
+  brackets: Array<{ limit: number; rate: number }>,
+): number {
+  if (income <= 0) return 0;
+
+  let tax = 0;
+  let remaining = income;
+
+  for (const bracket of brackets) {
+    if (remaining <= 0) break;
+    const taxable = Number.isFinite(bracket.limit) ? Math.min(remaining, bracket.limit) : remaining;
+    tax += taxable * bracket.rate;
+    remaining -= taxable;
+  }
+
+  return Math.round(tax);
+}
+
+function estimateAnnualRevenue(channel: {
+  estimatedAnnualRevenue?: number;
+  estimatedMonthlyRevenue?: number;
+  totalViews?: number;
+  topicCategories?: string[];
+  channelCreatedAt?: number;
+}) {
+  if (channel.estimatedAnnualRevenue !== undefined) {
+    return channel.estimatedAnnualRevenue;
+  }
+
+  if (channel.estimatedMonthlyRevenue !== undefined) {
+    return channel.estimatedMonthlyRevenue * 12;
+  }
+
+  if (channel.totalViews !== undefined) {
+    const lifetimeRevenue = estimateRevenueFromViews(channel.totalViews, channel.topicCategories ?? []);
+    if (!channel.channelCreatedAt) {
+      return lifetimeRevenue;
+    }
+
+    const ageDays = Math.max(30, (Date.now() - channel.channelCreatedAt) / (1000 * 60 * 60 * 24));
+    return lifetimeRevenue * (DAYS_IN_YEAR / ageDays);
+  }
+
+  return undefined;
+}
+
+export function estimateTaxForPeriod(channel: {
+  estimatedAnnualRevenue?: number;
+  estimatedMonthlyRevenue?: number;
+  totalViews?: number;
+  topicCategories?: string[];
+  channelCreatedAt?: number;
+}, periodDays: number): number | undefined {
+  const annualRevenue = estimateAnnualRevenue(channel);
+  if (annualRevenue === undefined) return undefined;
+
+  const periodRevenue = (annualRevenue * periodDays) / DAYS_IN_YEAR;
+  const periodBrackets = GHA_TAX_BRACKETS.map((bracket) => ({
+    limit: Number.isFinite(bracket.limit) ? (bracket.limit * periodDays) / DAYS_IN_YEAR : Infinity,
+    rate: bracket.rate,
+  }));
+
+  return calculateProgressiveTax(periodRevenue, periodBrackets);
+}