diff --git a/src/components/tickets/close-ticket-dialog.tsx b/src/components/tickets/close-ticket-dialog.tsx
index 1403492..af3f0e9 100644
--- a/src/components/tickets/close-ticket-dialog.tsx
+++ b/src/components/tickets/close-ticket-dialog.tsx
@@ -107,8 +107,10 @@ type CloseTicketDraft = {
   shouldAdjustTime: boolean
   internalHours: string
   internalMinutes: string
+  internalSeconds: string
   externalHours: string
   externalMinutes: string
+  externalSeconds: string
   adjustReason: string
   linkedReference: string
   reopenWindowDays: string
@@ -128,17 +130,22 @@ function applyTemplatePlaceholders(html: string, customerName?: string | null, a
 
 const splitDuration = (ms: number) => {
   const safeMs = Number.isFinite(ms) && ms > 0 ? ms : 0
-  const totalMinutes = Math.round(safeMs / 60000)
-  const hours = Math.floor(totalMinutes / 60)
-  const minutes = totalMinutes % 60
-  return { hours, minutes }
+  const totalSeconds = Math.floor(safeMs / 1000)
+  const hours = Math.floor(totalSeconds / 3600)
+  const minutes = Math.floor((totalSeconds % 3600) / 60)
+  const seconds = totalSeconds % 60
+  return { hours, minutes, seconds }
 }
 
 const formatDurationLabel = (ms: number) => {
-  const { hours, minutes } = splitDuration(ms)
-  if (hours > 0 && minutes > 0) return `${hours}h ${minutes}min`
-  if (hours > 0) return `${hours}h`
-  return `${minutes}min`
+  const { hours, minutes, seconds } = splitDuration(ms)
+  if (hours > 0) {
+    return `${hours}h ${minutes.toString().padStart(2, "0")}m`
+  }
+  if (minutes > 0) {
+    return `${minutes}m ${seconds.toString().padStart(2, "0")}s`
+  }
+  return `${seconds}s`
 }
 
 const STATUS_LABELS: Record<TicketStatus, string> = {
@@ -218,8 +225,10 @@ export function CloseTicketDialog({
   const [shouldAdjustTime, setShouldAdjustTime] = useState<boolean>(false)
   const [internalHours, setInternalHours] = useState<string>("0")
   const [internalMinutes, setInternalMinutes] = useState<string>("0")
+  const [internalSeconds, setInternalSeconds] = useState<string>("0")
   const [externalHours, setExternalHours] = useState<string>("0")
   const [externalMinutes, setExternalMinutes] = useState<string>("0")
+  const [externalSeconds, setExternalSeconds] = useState<string>("0")
   const [adjustReason, setAdjustReason] = useState<string>("")
   const enableAdjustment = Boolean(canAdjustTime && workSummary)
   const [linkedReference, setLinkedReference] = useState<string>("")
@@ -277,8 +286,10 @@ export function CloseTicketDialog({
     setAdjustReason("")
     setInternalHours("0")
     setInternalMinutes("0")
+    setInternalSeconds("0")
     setExternalHours("0")
     setExternalMinutes("0")
+    setExternalSeconds("0")
     setLinkedReference("")
     setLinkedTicketSelection(null)
     setLinkSuggestions([])
@@ -306,8 +317,10 @@ export function CloseTicketDialog({
       setShouldAdjustTime(Boolean(parsed.shouldAdjustTime))
       setInternalHours(parsed.internalHours ?? "0")
       setInternalMinutes(parsed.internalMinutes ?? "0")
+      setInternalSeconds(parsed.internalSeconds ?? "0")
       setExternalHours(parsed.externalHours ?? "0")
       setExternalMinutes(parsed.externalMinutes ?? "0")
+      setExternalSeconds(parsed.externalSeconds ?? "0")
       setAdjustReason(parsed.adjustReason ?? "")
       setLinkedReference(parsed.linkedReference ?? "")
       setLinkedTicketSelection(null)
@@ -332,8 +345,10 @@ export function CloseTicketDialog({
       shouldAdjustTime,
       internalHours,
       internalMinutes,
+      internalSeconds,
       externalHours,
       externalMinutes,
+      externalSeconds,
       adjustReason,
       linkedReference,
       reopenWindowDays,
@@ -348,8 +363,10 @@ export function CloseTicketDialog({
     draftStorageKey,
     externalHours,
     externalMinutes,
+    externalSeconds,
     internalHours,
     internalMinutes,
+    internalSeconds,
     linkedReference,
     message,
     reopenWindowDays,
@@ -392,8 +409,10 @@ export function CloseTicketDialog({
     const external = splitDuration(workSummary?.externalWorkedMs ?? 0)
     setInternalHours(internal.hours.toString())
     setInternalMinutes(internal.minutes.toString())
+    setInternalSeconds(internal.seconds.toString())
     setExternalHours(external.hours.toString())
     setExternalMinutes(external.minutes.toString())
+    setExternalSeconds(external.seconds.toString())
   }, [
     open,
     enableAdjustment,
@@ -595,6 +614,12 @@ export function CloseTicketDialog({
         toast.error("Os minutos internos devem estar entre 0 e 59.")
         return
       }
+      const internalSecondsValue = parsePart(internalSeconds, "segundos internos")
+      if (internalSecondsValue === null) return
+      if (internalSecondsValue >= 60) {
+        toast.error("Os segundos internos devem estar entre 0 e 59.")
+        return
+      }
 
       const externalHoursValue = parsePart(externalHours, "horas externas")
       if (externalHoursValue === null) return
@@ -604,9 +629,15 @@ export function CloseTicketDialog({
         toast.error("Os minutos externos devem estar entre 0 e 59.")
         return
       }
+      const externalSecondsValue = parsePart(externalSeconds, "segundos externos")
+      if (externalSecondsValue === null) return
+      if (externalSecondsValue >= 60) {
+        toast.error("Os segundos externos devem estar entre 0 e 59.")
+        return
+      }
 
-      targetInternalMs = (internalHoursValue * 60 + internalMinutesValue) * 60000
-      targetExternalMs = (externalHoursValue * 60 + externalMinutesValue) * 60000
+      targetInternalMs = (internalHoursValue * 3600 + internalMinutesValue * 60 + internalSecondsValue) * 1000
+      targetExternalMs = (externalHoursValue * 3600 + externalMinutesValue * 60 + externalSecondsValue) * 1000
       trimmedReason = adjustReason.trim()
       if (trimmedReason.length < 5) {
         toast.error("Descreva o motivo do ajuste (mínimo de 5 caracteres).")
@@ -716,10 +747,10 @@ export function CloseTicketDialog({
           </div>
           {shouldAdjustTime ? (
             <div className="mt-4 space-y-4">
-              <div className="grid gap-4 sm:grid-cols-2">
-                <div className="space-y-2">
+              <div className="grid gap-6 sm:grid-cols-2">
+                <div className="space-y-3">
                   <p className="text-xs font-semibold uppercase tracking-wide text-neutral-500">Tempo interno</p>
-                  <div className="grid grid-cols-2 gap-2">
+                  <div className="grid grid-cols-3 gap-2">
                     <div className="space-y-1">
                       <Label htmlFor="adjust-internal-hours" className="text-xs text-neutral-600">
                         Horas
@@ -751,12 +782,28 @@ export function CloseTicketDialog({
                         disabled={isSubmitting}
                       />
                     </div>
+                    <div className="space-y-1">
+                      <Label htmlFor="adjust-internal-seconds" className="text-xs text-neutral-600">
+                        Segundos
+                      </Label>
+                      <Input
+                        id="adjust-internal-seconds"
+                        type="number"
+                        min={0}
+                        max={59}
+                        step={1}
+                        inputMode="numeric"
+                        value={internalSeconds}
+                        onChange={(event) => setInternalSeconds(event.target.value)}
+                        disabled={isSubmitting}
+                      />
+                    </div>
                   </div>
                   <p className="text-xs text-neutral-500">Atual: {formatDurationLabel(workSummary?.internalWorkedMs ?? 0)}</p>
                 </div>
-                <div className="space-y-2">
+                <div className="space-y-3">
                   <p className="text-xs font-semibold uppercase tracking-wide text-neutral-500">Tempo externo</p>
-                  <div className="grid grid-cols-2 gap-2">
+                  <div className="grid grid-cols-3 gap-2">
                     <div className="space-y-1">
                       <Label htmlFor="adjust-external-hours" className="text-xs text-neutral-600">
                         Horas
@@ -788,6 +835,22 @@ export function CloseTicketDialog({
                         disabled={isSubmitting}
                       />
                     </div>
+                    <div className="space-y-1">
+                      <Label htmlFor="adjust-external-seconds" className="text-xs text-neutral-600">
+                        Segundos
+                      </Label>
+                      <Input
+                        id="adjust-external-seconds"
+                        type="number"
+                        min={0}
+                        max={59}
+                        step={1}
+                        inputMode="numeric"
+                        value={externalSeconds}
+                        onChange={(event) => setExternalSeconds(event.target.value)}
+                        disabled={isSubmitting}
+                      />
+                    </div>
                   </div>
                   <p className="text-xs text-neutral-500">Atual: {formatDurationLabel(workSummary?.externalWorkedMs ?? 0)}</p>
                 </div>
@@ -805,7 +868,7 @@ export function CloseTicketDialog({
                   disabled={isSubmitting}
                 />
                 <p className="text-xs text-neutral-500">
-                  Registre o motivo para fins de auditoria interna. Informe valores em minutos quando menor que 1 hora.
+                  Registre o motivo para fins de auditoria interna.
                 </p>
               </div>
             </div>