{"id":393,"date":"2026-05-08T19:32:54","date_gmt":"2026-05-08T23:32:54","guid":{"rendered":"https:\/\/fersfree.com\/blog\/?p=393"},"modified":"2026-06-30T14:33:10","modified_gmt":"2026-06-30T18:33:10","slug":"why-your-tsp-projection-may-be-wrong","status":"publish","type":"post","link":"https:\/\/fersfree.com\/blog\/why-your-tsp-projection-may-be-wrong\/","title":{"rendered":"Why Your TSP Projection May Be Completely Wrong"},"content":{"rendered":"<p>Many federal employees use retirement calculators and immediately assume the projected <a href=\"https:\/\/fersfree.com\/blog\/tsp-balance-by-age\/\">TSP balance<\/a> is accurate.<\/p>\n<p>But many projections rely on assumptions that may be unrealistic.<\/p>\n<p>Small changes in assumptions can dramatically change long-term outcomes.<\/p>\n<p><a href=\"https:\/\/fersfree.com\">https:\/\/fersfree.com<\/a><\/p>\n<hr \/>\n<h2>Why TSP Projections Fail<\/h2>\n<p>Most projections rely on assumptions involving:<\/p>\n<ul>\n<li>Market returns<\/li>\n<li>Inflation<\/li>\n<li>Contribution rates<\/li>\n<li>Retirement age<\/li>\n<li>Withdrawal strategy<\/li>\n<\/ul>\n<p>If the assumptions are unrealistic, the projection becomes misleading.<\/p>\n<hr \/>\n<h2>Mistake #1: Unrealistic Return Assumptions<\/h2>\n<p>Some calculators assume:<\/p>\n<ul>\n<li>Constant market growth<\/li>\n<li>Smooth annual returns<\/li>\n<li>No major downturns<\/li>\n<\/ul>\n<p>Real markets do not behave that way.<\/p>\n<p>Returns fluctuate significantly over time.<\/p>\n<hr \/>\n<h2>Mistake #2: Ignoring Inflation<\/h2>\n<p>A projected $2 million balance decades from now may not have the same purchasing power it has today.<\/p>\n<p>Inflation changes:<\/p>\n<ul>\n<li>Retirement spending<\/li>\n<li>Healthcare costs<\/li>\n<li>Long-term purchasing power<\/li>\n<\/ul>\n<p>This is one reason headline projections can feel misleading.<\/p>\n<hr \/>\n<h2>Mistake #3: Ignoring Withdrawal Reality<\/h2>\n<p>Many projections focus only on accumulation.<\/p>\n<p>But retirement also includes:<\/p>\n<ul>\n<li>Withdrawals<\/li>\n<li>Taxes<\/li>\n<li>Sequence risk<\/li>\n<li>Healthcare costs<\/li>\n<\/ul>\n<p>A large projected balance does not automatically create sustainable income.<\/p>\n<hr \/>\n<h2>Mistake #4: Wrong Retirement Age Assumptions<\/h2>\n<p>Retiring even a few years earlier or later may significantly change:<\/p>\n<ul>\n<li>TSP growth<\/li>\n<li>Pension income<\/li>\n<li>Withdrawal needs<\/li>\n<li>Social Security timing<\/li>\n<\/ul>\n<p>Timing matters more than many employees realize.<\/p>\n<hr \/>\n<h2>Mistake #5: Ignoring Taxes<\/h2>\n<p>Traditional <a href=\"https:\/\/fersfree.com\/blog\/biggest-tsp-withdrawal-mistakes\/\">TSP<\/a> balances are generally pre-tax.<\/p>\n<p>That means retirees may owe taxes during withdrawals.<\/p>\n<p>The projected balance is not necessarily spendable cash.<\/p>\n<hr \/>\n<h2>Sequence Risk Changes Outcomes<\/h2>\n<p>Poor market returns early in retirement combined with withdrawals can permanently damage long-term portfolio sustainability.<\/p>\n<p>Many simple calculators fail to model this properly.<\/p>\n<hr \/>\n<h2>Federal Employees Have More Variables<\/h2>\n<p>Federal retirement planning also includes:<\/p>\n<ul>\n<li>FERS pension<\/li>\n<li>FEHB<\/li>\n<li>Social Security<\/li>\n<li>Potential VA disability<\/li>\n<li>Retirement timing rules<\/li>\n<\/ul>\n<p>Ignoring these creates incomplete projections.<\/p>\n<hr \/>\n<h2>Example Projection Problem<\/h2>\n<h3>Projection A<\/h3>\n<ul>\n<li>Assumes 10% returns forever<\/li>\n<li>No inflation<\/li>\n<li>No taxes<\/li>\n<li>No withdrawals<\/li>\n<\/ul>\n<p>Result:<br \/>\nHuge projected balance<\/p>\n<h3>Projection B<\/h3>\n<ul>\n<li>Realistic returns<\/li>\n<li>Inflation included<\/li>\n<li>Taxes modeled<\/li>\n<li>Retirement withdrawals included<\/li>\n<\/ul>\n<p>Result:<br \/>\nMuch different retirement outlook<\/p>\n<hr \/>\n<h2>5 Common Projection Mistakes<\/h2>\n<ol>\n<li>Assuming constant market growth<\/li>\n<li>Ignoring inflation<\/li>\n<li>Forgetting taxes<\/li>\n<li>Ignoring retirement withdrawals<\/li>\n<li>Never modeling retirement timelines<\/li>\n<\/ol>\n<hr \/>\n<h2>Key Takeaway<\/h2>\n<p>Many TSP projections are misleading because they rely on unrealistic assumptions.<\/p>\n<p>Retirement planning should focus on:<\/p>\n<ul>\n<li>Sustainable income<\/li>\n<li>Net retirement cash flow<\/li>\n<li>Withdrawal strategy<\/li>\n<li>Long-term retirement flexibility<\/li>\n<\/ul>\n<p>Not just headline balances.<\/p>\n<hr \/>\n<h2>What to Do Next<\/h2>\n<p>Run realistic retirement projections:<\/p>\n<p><a href=\"https:\/\/fersfree.com\">https:\/\/fersfree.com<\/a><\/p>\n<p>Compare:<\/p>\n<ul>\n<li>Different return assumptions<\/li>\n<li>Retirement ages<\/li>\n<li>Withdrawal strategies<\/li>\n<li>Net retirement income<\/li>\n<\/ul>\n<hr \/>\n<h2>Disclaimer<\/h2>\n<p>This article is for educational purposes only. Investment and retirement decisions should be reviewed with qualified professionals.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Many federal employees use retirement calculators and immediately assume the projected TSP balance is accurate. But many projections rely on assumptions that may be unrealistic. Small changes in assumptions can dramatically change long-term outcomes. https:\/\/fersfree.com Why TSP Projections Fail Most projections rely on assumptions involving: Market returns Inflation Contribution rates Retirement age Withdrawal strategy If [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[120],"tags":[18,17,14,124,20,19,107,15,127,126],"class_list":["post-393","post","type-post","status-publish","format-standard","hentry","category-tsp","tag-federal-employees","tag-federal-retirement","tag-fers","tag-investing","tag-retirement-income","tag-retirement-planning","tag-retirement-readiness","tag-tsp","tag-tsp-projections","tag-withdrawal-strategy"],"_links":{"self":[{"href":"https:\/\/fersfree.com\/blog\/wp-json\/wp\/v2\/posts\/393","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fersfree.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fersfree.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fersfree.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fersfree.com\/blog\/wp-json\/wp\/v2\/comments?post=393"}],"version-history":[{"count":2,"href":"https:\/\/fersfree.com\/blog\/wp-json\/wp\/v2\/posts\/393\/revisions"}],"predecessor-version":[{"id":513,"href":"https:\/\/fersfree.com\/blog\/wp-json\/wp\/v2\/posts\/393\/revisions\/513"}],"wp:attachment":[{"href":"https:\/\/fersfree.com\/blog\/wp-json\/wp\/v2\/media?parent=393"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fersfree.com\/blog\/wp-json\/wp\/v2\/categories?post=393"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fersfree.com\/blog\/wp-json\/wp\/v2\/tags?post=393"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}