diff --git a/apps/web/src/app/shared/grid/grid.types.ts b/apps/web/src/app/shared/grid/grid.types.ts
index 4c1ebe1..c9a845f 100644
--- a/apps/web/src/app/shared/grid/grid.types.ts
+++ b/apps/web/src/app/shared/grid/grid.types.ts
@@ -17,6 +17,8 @@ export interface GridColumn {
   key: string;
   title: string;
   width?: string;
+  /** Alineación del texto de la columna (encabezado y celdas); por defecto, `right` en las numéricas y `left` en el resto. */
+  align?: 'left' | 'center' | 'right';
   /** `number` se alinea a la derecha, se muestra con formato y se interpreta al salir de la celda. */
   type?: 'text' | 'number';
   /** Decimales fijos para `number` (importes: 2); sin él, hasta 3 sin ceros sobrantes. */
diff --git a/apps/web/src/app/shared/grid/lines-grid.css b/apps/web/src/app/shared/grid/lines-grid.css
index b3a6368..653ba42 100644
--- a/apps/web/src/app/shared/grid/lines-grid.css
+++ b/apps/web/src/app/shared/grid/lines-grid.css
@@ -36,9 +36,6 @@ th {
   text-align: left;
   white-space: nowrap;
 }
-th.num {
-  text-align: right;
-}
 th.req::after {
   content: ' *';
   color: var(--err);
@@ -77,9 +74,6 @@ td.ro {
   border: 1px solid transparent;
   border-radius: var(--radius);
 }
-.cell.num {
-  text-align: right;
-}
 .cell.mono {
   font-family: ui-monospace, Menlo, Consolas, monospace;
 }
diff --git a/apps/web/src/app/shared/grid/lines-grid.html b/apps/web/src/app/shared/grid/lines-grid.html
index b14fccd..09994af 100644
--- a/apps/web/src/app/shared/grid/lines-grid.html
+++ b/apps/web/src/app/shared/grid/lines-grid.html
@@ -15,7 +15,7 @@
       <tr>
         <th class="rn">#</th>
         @for (c of columns(); track c.key) {
-          <th sboColResize [style.width]="c.width" [class.num]="c.type === 'number'" [class.req]="c.required">{{ c.title }}</th>
+          <th sboColResize [style.width]="c.width" [style.text-align]="alignOf(c)" [class.req]="c.required">{{ c.title }}</th>
         }
         @if (!readonly()) {
           <th class="del"><span class="sr">Quitar</span></th>
@@ -35,6 +35,7 @@
                     type="text"
                     autocomplete="off"
                     [class.mono]="c.mono"
+                    [style.text-align]="alignOf(c)"
                     [attr.data-r]="i"
                     [attr.data-c]="j"
                     [attr.aria-label]="c.title + ' de la línea ' + (i + 1)"
@@ -49,7 +50,7 @@
                   class="cell"
                   type="text"
                   autocomplete="off"
-                  [class.num]="c.type === 'number'"
+                  [style.text-align]="alignOf(c)"
                   [class.mono]="c.mono"
                   [readOnly]="isReadonly(line, c)"
                   [attr.data-r]="i"
diff --git a/apps/web/src/app/shared/grid/lines-grid.spec.ts b/apps/web/src/app/shared/grid/lines-grid.spec.ts
index 908e66a..929bbd6 100644
--- a/apps/web/src/app/shared/grid/lines-grid.spec.ts
+++ b/apps/web/src/app/shared/grid/lines-grid.spec.ts
@@ -464,3 +464,29 @@ describe('LinesGrid: columnas bloqueadas', () => {
     expect(el.querySelector<HTMLInputElement>('input[data-r="0"][data-c="0"]')!.readOnly).toBe(false);
   });
 });
+
+describe('LinesGrid: alineación de las columnas', () => {
+  it('por defecto las numéricas van a la derecha y el resto a la izquierda; `align` lo cambia', async () => {
+    await TestBed.configureTestingModule({
+      imports: [Host],
+      providers: [provideHttpClient(), provideHttpClientTesting()],
+    }).compileComponents();
+    const fixture = TestBed.createComponent(Host);
+    fixture.componentInstance.columns = [
+      { key: 'Texto', title: 'Texto' },
+      { key: 'Cantidad', title: 'Cantidad', type: 'number' },
+      { key: 'Codigo', title: 'Código', align: 'right' },
+      { key: 'Centrado', title: 'Centrado', align: 'center' },
+      { key: 'Importe', title: 'Importe', type: 'number', align: 'left' },
+    ];
+    fixture.componentInstance.lines.set([{ Texto: 'a', Cantidad: 1, Codigo: 'x', Centrado: 'c', Importe: 5 }]);
+    fixture.detectChanges();
+    await fixture.whenStable();
+    fixture.detectChanges();
+    const el = fixture.nativeElement as HTMLElement;
+    const heads = [...el.querySelectorAll<HTMLElement>('thead th')].slice(1, -1).map((t) => t.style.textAlign);
+    const cells = [0, 1, 2, 3, 4].map((c) => el.querySelector<HTMLInputElement>(`input[data-r="0"][data-c="${c}"]`)!.style.textAlign);
+    expect(heads).toEqual(['left', 'right', 'right', 'center', 'left']);
+    expect(cells).toEqual(['left', 'right', 'right', 'center', 'left']);
+  });
+});
diff --git a/apps/web/src/app/shared/grid/lines-grid.ts b/apps/web/src/app/shared/grid/lines-grid.ts
index 448a7ea..43bd02b 100644
--- a/apps/web/src/app/shared/grid/lines-grid.ts
+++ b/apps/web/src/app/shared/grid/lines-grid.ts
@@ -70,6 +70,11 @@ export class LinesGrid {
   });
   protected readonly lookupMultiple = computed(() => !!this.lookupTarget()?.column.lookup?.multiple);
 
+  /** Alineación de una columna: la declarada o, si no, derecha para las numéricas e izquierda para las demás. */
+  protected alignOf(column: GridColumn): 'left' | 'center' | 'right' {
+    return column.align ?? (column.type === 'number' ? 'right' : 'left');
+  }
+
   protected cellText(line: GridLine, column: GridColumn): string {
     if (column.format) return column.format(line);
     const value = line[column.key];