Error message
Deprecated function: Creation of dynamic property Drupal\tablefield\TableValue::$value is deprecated in Drupal\Core\TypedData\TypedData->setValue() (line 102 of core/lib/Drupal/Core/TypedData/TypedData.php).
Drupal\Core\TypedData\TypedData->setValue(NULL, ) (Line: 87) Drupal\Core\TypedData\Plugin\DataType\Map->setValue(Array, ) (Line: 125) Drupal\Core\Field\FieldItemBase->setValue(Array, ) (Line: 206) Drupal\tablefield\Plugin\Field\FieldType\TablefieldItem->setValue(Array, ) (Line: 208) Drupal\Core\TypedData\TypedDataManager->getPropertyInstance(Object, 0, Array) (Line: 91) Drupal\Core\Field\FieldTypePluginManager->createFieldItem(Object, 0, Array) (Line: 41) Drupal\Core\Field\FieldItemList->createItem(0, Array) (Line: 69) Drupal\Core\TypedData\Plugin\DataType\ItemList->setValue(Array, ) (Line: 107) Drupal\Core\Field\FieldItemList->setValue(Array, ) (Line: 208) Drupal\Core\TypedData\TypedDataManager->getPropertyInstance(Object, 'field_calc_table', Array) (Line: 83) Drupal\Core\Field\FieldTypePluginManager->createFieldItemList(Object, 'field_calc_table', Array) (Line: 633) Drupal\Core\Entity\ContentEntityBase->getTranslatedField('field_calc_table', 'x-default') (Line: 597) Drupal\Core\Entity\ContentEntityBase->get('field_calc_table') (Line: 325) Drupal\Core\Entity\EntityViewBuilder->buildComponents(Array, Array, Array, 'default') (Line: 281) Drupal\Core\Entity\EntityViewBuilder->buildMultiple(Array) (Line: 18) Drupal\paragraphs\ParagraphViewBuilder->buildMultiple(Array) (Line: 238) Drupal\Core\Entity\EntityViewBuilder->build(Array) call_user_func_array(Array, Array) (Line: 111) Drupal\Core\Render\Renderer->doTrustedCallback(Array, Array, 'Render #pre_render callbacks must be methods of a class that implements \Drupal\Core\Security\TrustedCallbackInterface or be an anonymous function. The callback was %s. See https://www.drupal.org/node/2966725', 'exception', 'Drupal\Core\Render\Element\RenderCallbackInterface') (Line: 859) Drupal\Core\Render\Renderer->doCallback('#pre_render', Array, Array) (Line: 421) Drupal\Core\Render\Renderer->doRender(Array, ) (Line: 240) Drupal\Core\Render\Renderer->render(Array) (Line: 475) Drupal\Core\Template\TwigExtension->escapeFilter(Object, Array, 'html', NULL, 1) (Line: 68) __TwigTemplate_291debf4453c7ba2e34da4fa4cd83699->doDisplay(Array, Array) (Line: 394) Twig\Template->displayWithErrorHandling(Array, Array) (Line: 367) Twig\Template->display(Array) (Line: 379) Twig\Template->render(Array) (Line: 38) Twig\TemplateWrapper->render(Array) (Line: 39) twig_render_template('themes/techprosolutions/templates/field/field.html.twig', Array) (Line: 348) Drupal\Core\Theme\ThemeManager->render('field', Array) (Line: 480) Drupal\Core\Render\Renderer->doRender(Array, ) (Line: 240) Drupal\Core\Render\Renderer->render(Array) (Line: 475) Drupal\Core\Template\TwigExtension->escapeFilter(Object, Array, 'html', NULL, 1) (Line: 111) __TwigTemplate_ff95cc8dbd011c21d5f5e7f83f8118b4->doDisplay(Array, Array) (Line: 394) Twig\Template->displayWithErrorHandling(Array, Array) (Line: 367) Twig\Template->display(Array) (Line: 379) Twig\Template->render(Array) (Line: 38) Twig\TemplateWrapper->render(Array) (Line: 39) twig_render_template('modules/custom/easytax_calculators/templates/ecp-calculator-page.html.twig', Array) (Line: 348) Drupal\Core\Theme\ThemeManager->render('ecp_calculator_page', Array) (Line: 480) Drupal\Core\Render\Renderer->doRender(Array, ) (Line: 240) Drupal\Core\Render\Renderer->render(Array, ) (Line: 238) Drupal\Core\Render\MainContent\HtmlRenderer->Drupal\Core\Render\MainContent\{closure}() (Line: 627) Drupal\Core\Render\Renderer->executeInRenderContext(Object, Object) (Line: 231) Drupal\Core\Render\MainContent\HtmlRenderer->prepare(Array, Object, Object) (Line: 128) Drupal\Core\Render\MainContent\HtmlRenderer->renderResponse(Array, Object, Object) (Line: 90) Drupal\Core\EventSubscriber\MainContentViewSubscriber->onViewRenderArray(Object, 'kernel.view', Object) call_user_func(Array, Object, 'kernel.view', Object) (Line: 111) Drupal\Component\EventDispatcher\ContainerAwareEventDispatcher->dispatch(Object, 'kernel.view') (Line: 186) Symfony\Component\HttpKernel\HttpKernel->handleRaw(Object, 1) (Line: 76) Symfony\Component\HttpKernel\HttpKernel->handle(Object, 1, 1) (Line: 58) Drupal\Core\StackMiddleware\Session->handle(Object, 1, 1) (Line: 48) Drupal\Core\StackMiddleware\KernelPreHandle->handle(Object, 1, 1) (Line: 28) Drupal\Core\StackMiddleware\ContentLength->handle(Object, 1, 1) (Line: 32) Drupal\big_pipe\StackMiddleware\ContentLength->handle(Object, 1, 1) (Line: 191) Drupal\page_cache\StackMiddleware\PageCache->fetch(Object, 1, 1) (Line: 128) Drupal\page_cache\StackMiddleware\PageCache->lookup(Object, 1, 1) (Line: 82) Drupal\page_cache\StackMiddleware\PageCache->handle(Object, 1, 1) (Line: 48) Drupal\Core\StackMiddleware\ReverseProxyMiddleware->handle(Object, 1, 1) (Line: 51) Drupal\Core\StackMiddleware\NegotiationMiddleware->handle(Object, 1, 1) (Line: 36) Drupal\Core\StackMiddleware\AjaxPageState->handle(Object, 1, 1) (Line: 51) Drupal\Core\StackMiddleware\StackedHttpKernel->handle(Object, 1, 1) (Line: 704) Drupal\Core\DrupalKernel->handle(Object) (Line: 21)Deprecated function: Creation of dynamic property Drupal\tablefield\Plugin\Field\FieldFormatter\TablefieldFormatter::$ModuleHandler is deprecated in Drupal\tablefield\Plugin\Field\FieldFormatter\TablefieldFormatter->__construct() (line 57 of modules/contrib/tablefield/src/Plugin/Field/FieldFormatter/TablefieldFormatter.php).
Drupal\tablefield\Plugin\Field\FieldFormatter\TablefieldFormatter->__construct('tablefield', Array, Object, Array, 'hidden', 'default', Array, Object, Object) (Line: 64) Drupal\tablefield\Plugin\Field\FieldFormatter\TablefieldFormatter::create(Object, Array, 'tablefield', Array) (Line: 64) Drupal\Core\Field\FormatterPluginManager->createInstance('tablefield', Array) (Line: 126) Drupal\Core\Field\FormatterPluginManager->getInstance(Array) (Line: 205) Drupal\Core\Entity\Entity\EntityViewDisplay->getRenderer('field_calc_table') (Line: 241) Drupal\Core\Entity\Entity\EntityViewDisplay->buildMultiple(Array) (Line: 339) Drupal\Core\Entity\EntityViewBuilder->buildComponents(Array, Array, Array, 'default') (Line: 281) Drupal\Core\Entity\EntityViewBuilder->buildMultiple(Array) (Line: 18) Drupal\paragraphs\ParagraphViewBuilder->buildMultiple(Array) (Line: 238) Drupal\Core\Entity\EntityViewBuilder->build(Array) call_user_func_array(Array, Array) (Line: 111) Drupal\Core\Render\Renderer->doTrustedCallback(Array, Array, 'Render #pre_render callbacks must be methods of a class that implements \Drupal\Core\Security\TrustedCallbackInterface or be an anonymous function. The callback was %s. See https://www.drupal.org/node/2966725', 'exception', 'Drupal\Core\Render\Element\RenderCallbackInterface') (Line: 859) Drupal\Core\Render\Renderer->doCallback('#pre_render', Array, Array) (Line: 421) Drupal\Core\Render\Renderer->doRender(Array, ) (Line: 240) Drupal\Core\Render\Renderer->render(Array) (Line: 475) Drupal\Core\Template\TwigExtension->escapeFilter(Object, Array, 'html', NULL, 1) (Line: 68) __TwigTemplate_291debf4453c7ba2e34da4fa4cd83699->doDisplay(Array, Array) (Line: 394) Twig\Template->displayWithErrorHandling(Array, Array) (Line: 367) Twig\Template->display(Array) (Line: 379) Twig\Template->render(Array) (Line: 38) Twig\TemplateWrapper->render(Array) (Line: 39) twig_render_template('themes/techprosolutions/templates/field/field.html.twig', Array) (Line: 348) Drupal\Core\Theme\ThemeManager->render('field', Array) (Line: 480) Drupal\Core\Render\Renderer->doRender(Array, ) (Line: 240) Drupal\Core\Render\Renderer->render(Array) (Line: 475) Drupal\Core\Template\TwigExtension->escapeFilter(Object, Array, 'html', NULL, 1) (Line: 111) __TwigTemplate_ff95cc8dbd011c21d5f5e7f83f8118b4->doDisplay(Array, Array) (Line: 394) Twig\Template->displayWithErrorHandling(Array, Array) (Line: 367) Twig\Template->display(Array) (Line: 379) Twig\Template->render(Array) (Line: 38) Twig\TemplateWrapper->render(Array) (Line: 39) twig_render_template('modules/custom/easytax_calculators/templates/ecp-calculator-page.html.twig', Array) (Line: 348) Drupal\Core\Theme\ThemeManager->render('ecp_calculator_page', Array) (Line: 480) Drupal\Core\Render\Renderer->doRender(Array, ) (Line: 240) Drupal\Core\Render\Renderer->render(Array, ) (Line: 238) Drupal\Core\Render\MainContent\HtmlRenderer->Drupal\Core\Render\MainContent\{closure}() (Line: 627) Drupal\Core\Render\Renderer->executeInRenderContext(Object, Object) (Line: 231) Drupal\Core\Render\MainContent\HtmlRenderer->prepare(Array, Object, Object) (Line: 128) Drupal\Core\Render\MainContent\HtmlRenderer->renderResponse(Array, Object, Object) (Line: 90) Drupal\Core\EventSubscriber\MainContentViewSubscriber->onViewRenderArray(Object, 'kernel.view', Object) call_user_func(Array, Object, 'kernel.view', Object) (Line: 111) Drupal\Component\EventDispatcher\ContainerAwareEventDispatcher->dispatch(Object, 'kernel.view') (Line: 186) Symfony\Component\HttpKernel\HttpKernel->handleRaw(Object, 1) (Line: 76) Symfony\Component\HttpKernel\HttpKernel->handle(Object, 1, 1) (Line: 58) Drupal\Core\StackMiddleware\Session->handle(Object, 1, 1) (Line: 48) Drupal\Core\StackMiddleware\KernelPreHandle->handle(Object, 1, 1) (Line: 28) Drupal\Core\StackMiddleware\ContentLength->handle(Object, 1, 1) (Line: 32) Drupal\big_pipe\StackMiddleware\ContentLength->handle(Object, 1, 1) (Line: 191) Drupal\page_cache\StackMiddleware\PageCache->fetch(Object, 1, 1) (Line: 128) Drupal\page_cache\StackMiddleware\PageCache->lookup(Object, 1, 1) (Line: 82) Drupal\page_cache\StackMiddleware\PageCache->handle(Object, 1, 1) (Line: 48) Drupal\Core\StackMiddleware\ReverseProxyMiddleware->handle(Object, 1, 1) (Line: 51) Drupal\Core\StackMiddleware\NegotiationMiddleware->handle(Object, 1, 1) (Line: 36) Drupal\Core\StackMiddleware\AjaxPageState->handle(Object, 1, 1) (Line: 51) Drupal\Core\StackMiddleware\StackedHttpKernel->handle(Object, 1, 1) (Line: 704) Drupal\Core\DrupalKernel->handle(Object) (Line: 21)Warning: Undefined array key "caption" in Drupal\tablefield\Plugin\Field\FieldFormatter\TablefieldFormatter->viewElements() (line 150 of modules/contrib/tablefield/src/Plugin/Field/FieldFormatter/TablefieldFormatter.php).
Drupal\tablefield\Plugin\Field\FieldFormatter\TablefieldFormatter->viewElements(Object, 'en') (Line: 91) Drupal\Core\Field\FormatterBase->view(Object, 'en') (Line: 268) Drupal\Core\Entity\Entity\EntityViewDisplay->buildMultiple(Array) (Line: 339) Drupal\Core\Entity\EntityViewBuilder->buildComponents(Array, Array, Array, 'default') (Line: 281) Drupal\Core\Entity\EntityViewBuilder->buildMultiple(Array) (Line: 18) Drupal\paragraphs\ParagraphViewBuilder->buildMultiple(Array) (Line: 238) Drupal\Core\Entity\EntityViewBuilder->build(Array) call_user_func_array(Array, Array) (Line: 111) Drupal\Core\Render\Renderer->doTrustedCallback(Array, Array, 'Render #pre_render callbacks must be methods of a class that implements \Drupal\Core\Security\TrustedCallbackInterface or be an anonymous function. The callback was %s. See https://www.drupal.org/node/2966725', 'exception', 'Drupal\Core\Render\Element\RenderCallbackInterface') (Line: 859) Drupal\Core\Render\Renderer->doCallback('#pre_render', Array, Array) (Line: 421) Drupal\Core\Render\Renderer->doRender(Array, ) (Line: 240) Drupal\Core\Render\Renderer->render(Array) (Line: 475) Drupal\Core\Template\TwigExtension->escapeFilter(Object, Array, 'html', NULL, 1) (Line: 68) __TwigTemplate_291debf4453c7ba2e34da4fa4cd83699->doDisplay(Array, Array) (Line: 394) Twig\Template->displayWithErrorHandling(Array, Array) (Line: 367) Twig\Template->display(Array) (Line: 379) Twig\Template->render(Array) (Line: 38) Twig\TemplateWrapper->render(Array) (Line: 39) twig_render_template('themes/techprosolutions/templates/field/field.html.twig', Array) (Line: 348) Drupal\Core\Theme\ThemeManager->render('field', Array) (Line: 480) Drupal\Core\Render\Renderer->doRender(Array, ) (Line: 240) Drupal\Core\Render\Renderer->render(Array) (Line: 475) Drupal\Core\Template\TwigExtension->escapeFilter(Object, Array, 'html', NULL, 1) (Line: 111) __TwigTemplate_ff95cc8dbd011c21d5f5e7f83f8118b4->doDisplay(Array, Array) (Line: 394) Twig\Template->displayWithErrorHandling(Array, Array) (Line: 367) Twig\Template->display(Array) (Line: 379) Twig\Template->render(Array) (Line: 38) Twig\TemplateWrapper->render(Array) (Line: 39) twig_render_template('modules/custom/easytax_calculators/templates/ecp-calculator-page.html.twig', Array) (Line: 348) Drupal\Core\Theme\ThemeManager->render('ecp_calculator_page', Array) (Line: 480) Drupal\Core\Render\Renderer->doRender(Array, ) (Line: 240) Drupal\Core\Render\Renderer->render(Array, ) (Line: 238) Drupal\Core\Render\MainContent\HtmlRenderer->Drupal\Core\Render\MainContent\{closure}() (Line: 627) Drupal\Core\Render\Renderer->executeInRenderContext(Object, Object) (Line: 231) Drupal\Core\Render\MainContent\HtmlRenderer->prepare(Array, Object, Object) (Line: 128) Drupal\Core\Render\MainContent\HtmlRenderer->renderResponse(Array, Object, Object) (Line: 90) Drupal\Core\EventSubscriber\MainContentViewSubscriber->onViewRenderArray(Object, 'kernel.view', Object) call_user_func(Array, Object, 'kernel.view', Object) (Line: 111) Drupal\Component\EventDispatcher\ContainerAwareEventDispatcher->dispatch(Object, 'kernel.view') (Line: 186) Symfony\Component\HttpKernel\HttpKernel->handleRaw(Object, 1) (Line: 76) Symfony\Component\HttpKernel\HttpKernel->handle(Object, 1, 1) (Line: 58) Drupal\Core\StackMiddleware\Session->handle(Object, 1, 1) (Line: 48) Drupal\Core\StackMiddleware\KernelPreHandle->handle(Object, 1, 1) (Line: 28) Drupal\Core\StackMiddleware\ContentLength->handle(Object, 1, 1) (Line: 32) Drupal\big_pipe\StackMiddleware\ContentLength->handle(Object, 1, 1) (Line: 191) Drupal\page_cache\StackMiddleware\PageCache->fetch(Object, 1, 1) (Line: 128) Drupal\page_cache\StackMiddleware\PageCache->lookup(Object, 1, 1) (Line: 82) Drupal\page_cache\StackMiddleware\PageCache->handle(Object, 1, 1) (Line: 48) Drupal\Core\StackMiddleware\ReverseProxyMiddleware->handle(Object, 1, 1) (Line: 51) Drupal\Core\StackMiddleware\NegotiationMiddleware->handle(Object, 1, 1) (Line: 36) Drupal\Core\StackMiddleware\AjaxPageState->handle(Object, 1, 1) (Line: 51) Drupal\Core\StackMiddleware\StackedHttpKernel->handle(Object, 1, 1) (Line: 704) Drupal\Core\DrupalKernel->handle(Object) (Line: 21)
Simple Interest Calculator
Flat, non-compounding interest on a principal — P × r × t with a year-by-year build-up of interest and total value.
Year-wise interest
| Year | Total interest | Total value |
|---|---|---|
| 1 | ₹8,000 | ₹1,08,000 |
| 2 | ₹16,000 | ₹1,16,000 |
| 3 | ₹24,000 | ₹1,24,000 |
| 4 | ₹32,000 | ₹1,32,000 |
| 5 | ₹40,000 | ₹1,40,000 |
What is simple interest?
Simple interest is flat interest charged on the original principal alone — the interest never earns interest. Every year adds the same rupee amount, so the total grows in a straight line instead of the accelerating curve you get with compounding.
You will meet it in penal and late-payment interest (income tax and GST both charge simple interest per day of delay), court-awarded interest, some gold and short-term loans, and informal lending. Enter a principal, a rate and a tenure, and this calculator returns the total interest, the maturity value and a year-by-year build-up.
The simple interest formula
SI = P × r × t ÷ 100
- SI — the total interest earned or charged
- P — the principal amount
- r — the annual interest rate in percent
- t — the time in years; months convert to fractions, so 1 year 6 months is t = 1.5
- Total value — P + SI, since the principal is returned unchanged
How to use this calculator
- Enter the principal amount — the sum lent, borrowed or deposited.
- Set the interest rate per annum with the slider.
- Set the time period in years, adding months if the tenure is not a whole number of years.
- Read off the total interest and the total value, and scan the year-wise table to see the flat, linear build-up.
A worked example
₹1,00,000 at 8% per annum for 10 years:
- Interest: 1,00,000 × 8 × 10 ÷ 100 = ₹80,000
- Total value: ₹1,80,000
- Each year adds exactly ₹8,000 — after year 1 the value is ₹1,08,000, after year 2 it is ₹1,16,000, and so on
Fractional tenures work the same way: the same ₹1,00,000 at 6% for 18 months earns 1,00,000 × 6 × 1.5 ÷ 100 = ₹9,000, for a total of ₹1,09,000.
How ₹1,00,000 grows at 8% simple interest
| Year | Interest to date | Total value |
|---|---|---|
| 1 | ₹8,000 | ₹1,08,000 |
| 2 | ₹16,000 | ₹1,16,000 |
| 5 | ₹40,000 | ₹1,40,000 |
| 10 | ₹80,000 | ₹1,80,000 |
The growth is perfectly linear — double the time, double the interest. A compounding deposit at the same rate pulls ahead a little more every year, which is why bank FDs and most investments quote compound, not simple, interest.
Simple interest is charged on the principal alone; compound interest is recalculated on principal plus accumulated interest each period. On ₹1,00,000 at 8% for 10 years, simple interest earns a flat ₹80,000, while annual compounding earns more because every year’s interest starts earning too. Over long tenures the gap becomes very large.
Mostly where the law or a contract fixes a flat charge: interest on late payment of income tax (1% or 1.5% per month, simple), GST paid late (18% per annum, counted per day), court awards, some gold loans, and informal lending. Deposits and most loans from banks compound instead.
Yes. Interest you earn is taxed as income from other sources at your slab rate. Banks and post offices deduct TDS under section 194A once interest crosses ₹50,000 in a financial year — ₹1,00,000 for senior citizens — at the FY 2025-26 thresholds.
Months become a fraction of a year: 6 months adds 0.5 to t, so 2 years 3 months is t = 2.25. The year-wise table shows each completed year plus a final part-year row when the tenure is not whole.