diff --git a/frontend/src/components/LeftoverMapPlot.tsx b/frontend/src/components/LeftoverMapPlot.tsx
index 4fc42abd6..9f63b5d5e 100644
--- a/frontend/src/components/LeftoverMapPlot.tsx
+++ b/frontend/src/components/LeftoverMapPlot.tsx
@@ -30,6 +30,7 @@ import {
 import {
   formatLeftoverMapPlotAxisSingular,
   leftoverMapComparePlotAxisBadge,
+  leftoverMapPlotTickAxisBadge,
   leftoverSingularForAxis,
   LEFTOVER_MAP_COMPARE_PLOT_AXIS_SINGULAR,
   LEFTOVER_MAP_COMPARE_PLOT_AXIS_SINGULAR_SHARE,
@@ -360,30 +361,42 @@ export function LeftoverMapPlot({
           >
             {leftoverMapPlotAxisText(2, leftoverMapAxes, variant)}
           </text>
-          {layout.ticks.map((tick) => (
-            <g
-              key={`tick:${tick.axis}:${tick.value}`}
-              className="leftover-map-plot-tick"
-              aria-label={
-                variant === "comparison"
-                  ? `${t(LEFTOVER_MAP_COMPARE_PLOT_LABEL)}: ${tf(LEFTOVER_MAP_PLOT_TICK, {
-                      axis: tick.axis,
-                      value: tick.label,
-                    })}`
-                  : tf(LEFTOVER_MAP_PLOT_TICK, { axis: tick.axis, value: tick.label })
-              }
-            >
-              <line x1={tick.x} y1={tick.y} x2={tick.tickX2} y2={tick.tickY2} />
-              <text
-                className="leftover-map-plot-tick-label"
-                x={tick.axis === 1 ? tick.x : tick.tickX2 - 2}
-                y={tick.axis === 1 ? tick.tickY2 + 12 : tick.y + 4}
-                textAnchor={tick.axis === 1 ? "middle" : "end"}
+          {layout.ticks.map((tick) => {
+            const reportTickBadge =
+              variant === "report"
+                ? leftoverMapPlotTickAxisBadge(
+                    tick.axis,
+                    tick.label,
+                    leftoverSingularForAxis(leftoverMapAxes, tick.axis),
+                  )
+                : null;
+            const tickAriaLabel =
+              variant === "comparison"
+                ? `${t(LEFTOVER_MAP_COMPARE_PLOT_LABEL)}: ${tf(LEFTOVER_MAP_PLOT_TICK, {
+                    axis: tick.axis,
+                    value: tick.label,
+                  })}`
+                : reportTickBadge !== null
+                  ? tf(reportTickBadge.template, reportTickBadge.values)
+                  : tf(LEFTOVER_MAP_PLOT_TICK, { axis: tick.axis, value: tick.label });
+            return (
+              <g
+                key={`tick:${tick.axis}:${tick.value}`}
+                className="leftover-map-plot-tick"
+                aria-label={tickAriaLabel}
               >
-                {tick.label}
-              </text>
-            </g>
-          ))}
+                <line x1={tick.x} y1={tick.y} x2={tick.tickX2} y2={tick.tickY2} />
+                <text
+                  className="leftover-map-plot-tick-label"
+                  x={tick.axis === 1 ? tick.x : tick.tickX2 - 2}
+                  y={tick.axis === 1 ? tick.tickY2 + 12 : tick.y + 4}
+                  textAnchor={tick.axis === 1 ? "middle" : "end"}
+                >
+                  {tick.label}
+                </text>
+              </g>
+            );
+          })}
           {layout.segments.map((segment) => (
             <g key={`${segment.pairKind}:${segment.postId}:${segment.criterionCode}`}>
               <line
diff --git a/frontend/src/leftoverMapPlotAxisSingular.ts b/frontend/src/leftoverMapPlotAxisSingular.ts
index 85ae687e8..273b15244 100644
--- a/frontend/src/leftoverMapPlotAxisSingular.ts
+++ b/frontend/src/leftoverMapPlotAxisSingular.ts
@@ -27,6 +27,9 @@ export const LEFTOVER_MAP_COMPARE_AXIS_SINGULAR_SHARE =
 export const LEFTOVER_MAP_COMPARE_AXIS_SHARE =
   "leftover map comparison leftover axis {axis} {share}%";
 
+export const LEFTOVER_MAP_PLOT_TICK_SINGULAR =
+  "leftover-map axis {axis} tick {value} σ {singular}";
+
 export type LeftoverMapPlotAxisSingular = {
   axis_index: LeftoverMapAxis["axis_index"];
   leftover_singular_value?: LeftoverMapAxis["leftover_singular_value"] | null;
@@ -131,3 +134,19 @@ export function leftoverMapCompareAxisBadge(
     values: { axis: axis.axis_index, value: singular as string, share: share as string },
   };
 }
+
+/** Project finite persisted σ onto one report-graphic tick without inventing share evidence. */
+export function leftoverMapPlotTickAxisBadge(
+  axisIndex: number,
+  tickLabel: string,
+  leftoverSingular: number | null | undefined,
+): LeftoverMapCompareAxisBadge | null {
+  const singular = formatLeftoverMapPlotAxisSingular(leftoverSingular);
+  if (singular === null) {
+    return null;
+  }
+  return {
+    template: LEFTOVER_MAP_PLOT_TICK_SINGULAR,
+    values: { axis: axisIndex, value: tickLabel, singular },
+  };
+}
diff --git a/tests/test_grouping_comparison_graphic_tick_contract.py b/tests/test_grouping_comparison_graphic_tick_contract.py
index d0c3af61e..d6614a610 100644
--- a/tests/test_grouping_comparison_graphic_tick_contract.py
+++ b/tests/test_grouping_comparison_graphic_tick_contract.py
@@ -1,4 +1,4 @@
-"""Executable contract for coordinate ticks on the grouping-comparison graphic."""
+"""Executable wiring contract for coordinate ticks on the grouping-comparison graphic."""
 
 from pathlib import Path
 import re
@@ -10,16 +10,25 @@
 
 
 def test_comparison_graphic_names_ticks_with_distinct_accessible_copy() -> None:
-    """Comparison ticks compose existing localized comparison and tick copy."""
+    """Comparison ticks keep localized comparison copy while report ticks may add persisted σ evidence."""
     plot_source = PLOT_SOURCE.read_text(encoding="utf-8")
 
-    assert "LEFTOVER_MAP_COMPARE_PLOT_LABEL" in plot_source
-    assert "LEFTOVER_MAP_PLOT_TICK" in plot_source
+    # v2.84 adds a report-only evidence badge. Comparison ticks must keep the
+    # existing localized comparison + generic tick composition rather than
+    # inheriting report evidence or introducing a comparison-only translation.
+    assert "leftoverMapPlotTickAxisBadge" in plot_source
+    assert "leftoverSingularForAxis(leftoverMapAxes, tick.axis)" in plot_source
     assert re.search(
-        r'variant\s*===\s*"comparison"\s*\?\s*`\$\{t\(LEFTOVER_MAP_COMPARE_PLOT_LABEL\)\}:\s*\$\{tf\(LEFTOVER_MAP_PLOT_TICK,\s*\{\s*axis:\s*tick\.axis,\s*value:\s*tick\.label,?\s*\}\)\}`\s*:\s*tf\(LEFTOVER_MAP_PLOT_TICK,\s*\{\s*axis:\s*tick\.axis,\s*value:\s*tick\.label,?\s*\}\)',
+        r'reportTickBadge\s*=\s*variant\s*===\s*"report"\s*\?\s*leftoverMapPlotTickAxisBadge\(',
         plot_source,
         re.DOTALL,
     )
+    assert re.search(
+        r'variant\s*===\s*"comparison"\s*\?\s*`\$\{t\(LEFTOVER_MAP_COMPARE_PLOT_LABEL\)\}:\s*\$\{tf\(LEFTOVER_MAP_PLOT_TICK,\s*\{\s*axis:\s*tick\.axis,\s*value:\s*tick\.label,?\s*\}\)\}`',
+        plot_source,
+        re.DOTALL,
+    )
+    assert "tf(reportTickBadge.template, reportTickBadge.values)" in plot_source
     assert "LEFTOVER_MAP_COMPARE_PLOT_TICK" not in plot_source
 
 
diff --git a/tests/test_leftover_map_report_tick_singular_contract.py b/tests/test_leftover_map_report_tick_singular_contract.py
new file mode 100644
index 000000000..cfd1da29b
--- /dev/null
+++ b/tests/test_leftover_map_report_tick_singular_contract.py
@@ -0,0 +1,37 @@
+"""Executable contract for report-graphic tick singular-value captions."""
+
+from pathlib import Path
+
+
+ROOT = Path(__file__).resolve().parents[1]
+SINGULAR_SOURCE = ROOT / "frontend" / "src" / "leftoverMapPlotAxisSingular.ts"
+PLOT_COMPONENT_SOURCE = ROOT / "frontend" / "src" / "components" / "LeftoverMapPlot.tsx"
+
+
+def test_report_graphic_tick_keeps_persisted_singular_value_without_share() -> None:
+    """A tick may name valid persisted σ even when axis share is absent."""
+    assert SINGULAR_SOURCE.exists(), "singular-value axis helper is missing"
+    source = SINGULAR_SOURCE.read_text(encoding="utf-8")
+
+    assert "leftoverMapPlotTickAxisBadge" in source
+    assert "leftover-map axis {axis} tick {value} σ {singular}" in source
+
+
+def test_report_graphic_consumes_tick_singular_projection() -> None:
+    """The buyer-visible report graphic must consume the persisted-σ tick projection."""
+    source = PLOT_COMPONENT_SOURCE.read_text(encoding="utf-8")
+
+    assert "leftoverMapPlotTickAxisBadge" in source
+    assert "leftoverSingularForAxis(leftoverMapAxes, tick.axis)" in source
+    assert "tf(reportTickBadge.template, reportTickBadge.values)" in source
+
+
+def test_report_graphic_tick_does_not_infer_sigma_or_share() -> None:
+    """Invalid σ falls back to the ordinary tick and ticks never synthesize share."""
+    assert SINGULAR_SOURCE.exists(), "singular-value axis helper is missing"
+    source = SINGULAR_SOURCE.read_text(encoding="utf-8")
+
+    assert "formatLeftoverMapPlotAxisSingular" in source
+    assert "Number.isFinite" in source
+    assert "Math.sqrt" not in source
+    assert "leftover_share" not in source.split("leftoverMapPlotTickAxisBadge", 1)[-1][:1400]