What Is Seller Discretionary Earnings (SDE)?

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If you've looked at any online business listing on Empire Flippers, Flippa, or Quiet Light, you've seen the acronym SDE. Seller Discretionary Earnings is the primary valuation metric for small and mid-sized online businesses — the number everything else is built on. Get it right, and you know exactly what you're paying for. Get it wrong, and you overpay for a business that can't sustain its reported earnings after the seller leaves.

SDE sounds simple but has a lot of moving parts. This guide covers the exact formula, which add-backs are legitimate versus which are manipulation, how SDE differs from EBITDA, what multiples apply in 2026, and how buyers use SDE to negotiate fair deals. If you're serious about acquiring an online business, understanding SDE is non-negotiable.

The SDE Formula: What It Is and How It's Calculated

Seller Discretionary Earnings represents the total economic benefit that flows to a single owner-operator of a business. The formula starts with net profit and adds back specific items — called "add-backs" — that are either owner-specific expenses or non-recurring costs that won't continue under new ownership.

The basic SDE formula is:

SDE = Net Profit + Owner Salary + Owner Benefits + Non-Recurring Expenses + Non-Cash Charges (depreciation/amortization) + Owner Personal Expenses Run Through the Business

Let's walk through each component with real numbers. Imagine an Amazon FBA business with the following annual financials:

• Revenue: $1,200,000
• COGS: $480,000 (40%)
• Gross profit: $720,000
• Amazon fees: $180,000
• Advertising: $96,000
• Software and tools: $24,000
• Contractor fees (VA, designer): $36,000
• Owner salary: $120,000
• Owner health insurance: $18,000
• One-time legal fee (trademark filing): $8,000
• Depreciation on equipment: $4,000
• Net profit: $154,000

The reported net profit is $154,000. But when you calculate SDE, you add back: $120,000 owner salary + $18,000 health insurance + $8,000 non-recurring legal fee + $4,000 depreciation = $150,000 in add-backs. SDE = $154,000 + $150,000 = $304,000. That's a dramatically different number from net profit, and it's the number the business would be priced on — typically 2.5x–3.5x SDE for an FBA business in 2026, putting the asking price at $760,000–$1,064,000.

Legitimate Add-Backs vs. Manipulation: How to Tell the Difference

Add-backs are where SDE gets complicated — and where unsophisticated sellers (or dishonest ones) inflate the number to justify higher asking prices. Understanding which add-backs are legitimate and which are inflated is one of the most important skills in online business due diligence.

Legitimate add-backs include: owner salary and benefits (since the buyer will replace the owner's economic output, either personally or by hiring someone), truly non-recurring expenses (a one-time legal dispute settlement, a one-time system migration cost, a rebrand that won't repeat), depreciation and amortization (non-cash charges that don't represent real cash outflows), and personal expenses that are clearly personal and clearly one-time (a business trip that was really a vacation, entered as business expense).

Questionable or illegitimate add-backs include: recurring operational expenses labeled as "non-recurring" (if a business needs customer support help every month, that's an operating cost, not an add-back); owner's time contribution that isn't being replaced (if the owner does 20 hours/week of work and the add-back assumes someone can be hired for $2,000/month when the market rate is $5,000/month, the add-back is inflated); revenue from one-time events labeled as recurring (a viral moment that generated $40,000 in a single month shouldn't be in the TTM average at face value); and expenses deliberately deferred until after the listing period to inflate short-term SDE.

The test for any add-back: would this expense exist under new ownership? If yes, it's not an add-back — it's an ongoing operating cost. If a seller adds back their $8,000/month salary but the business requires 30 hours/week of active management, you need to factor in what it would actually cost you to replace that labor. At market rates for a competent operator, that might be $6,000–$8,000/month anyway — the add-back effectively gets cancelled out by the realistic replacement cost. This is how sellers inflate SDE, and it's how many buyers overpay.

SDE vs. EBITDA: Which Metric Applies When

Buyers often see both SDE and EBITDA used in business valuations and wonder which one to use. The answer depends on the size of the business and whether there's a single owner-operator or a management team in place.

SDE is appropriate for businesses where one person (the owner) is the primary operator — the person whose salary, benefits, and personal expenses are mixed into the business finances. This is the standard metric for online businesses generating under $5M annual revenue with a solo or small founding team. Almost every listing on Empire Flippers, Flippa, and Quiet Light is valued on SDE. The key characteristic: SDE adds back the owner's entire economic compensation because the new buyer will step into the owner role and receive that compensation directly.

EBITDA (Earnings Before Interest, Taxes, Depreciation, and Amortization) is appropriate for businesses with a management team in place where the owner isn't the primary operator. EBITDA does not add back owner salary — it assumes the business has or needs professional management whose compensation is already baked into the operating expenses. Private equity firms, strategic acquirers, and institutional buyers use EBITDA because they're buying a business to be managed by hired professionals, not operated personally. For online businesses above $5M revenue with employed management teams, EBITDA is the right metric.

The practical difference: for the same business, SDE will be higher than EBITDA because SDE adds back the owner's compensation that EBITDA includes as an expense. A business with $300,000 EBITDA and a $120,000 owner salary has $420,000 SDE. Apply a 3x multiple and you get: $900,000 on EBITDA, $1,260,000 on SDE. If the seller is using SDE and you're thinking in EBITDA terms, you'll misread the valuation significantly.

One more important distinction: EBITDA also doesn't add back one-time or non-recurring expenses the way SDE does. SDE is more generous in both directions — it adds back more items and is more commonly adjusted. When evaluating whether a seller's add-backs are reasonable, reference the EBITDA baseline: if the adjusted EBITDA is $200,000 but SDE is $380,000, you're being asked to add back $180,000 of "owner-specific" items. That's a lot of add-backs — scrutinize each one carefully.

SDE Multiples in 2026: What Businesses Actually Trade At

The multiple applied to SDE determines the asking price. Understanding what multiples are realistic for different business types prevents you from accepting inflated asking prices as "market rate" when they're not.

Here are the current 2026 SDE multiples by business type, based on deals tracked through dealalertai.com and publicly available marketplace data:

• Amazon FBA businesses: 2.0x–3.8x SDE. Higher end for established brands with diversified ASINs and strong repeat metrics. Lower end for single-ASIN or commodity businesses.
• Shopify / ecommerce stores: 2.0x–3.5x SDE. Premium for brand-driven stores with 30%+ repeat customer rates. Discount for paid-traffic-dependent stores with thin margins.
• Content sites / niche websites: 2.5x–3.8x SDE. Premium for sites with diversified traffic and revenue, 36 months of stability. Discount for Google-dependent or recently launched sites.
• SaaS businesses: 3.0x–5.5x SDE. Premium for businesses with NRR above 100%, low churn, and strong product-market fit. These trade higher because recurring revenue compounds predictably.
• Newsletters and email businesses: 2.0x–3.5x SDE. Premium for high-engagement lists with sponsor revenue and digital product monetization. Discount for lists with weak open rates or single-sponsor dependency.
• Agencies: 2.0x–3.2x SDE. Lower multiple reflects people risk and client concentration risk inherent in service businesses.
• YouTube channels: 2.0x–3.3x SDE (expressed as monthly multiple: 24x–40x monthly net profit). Premium for faceless channels with diversified revenue. Discount for creator-dependent channels.

These multiples are starting points for negotiation, not fixed prices. A business with exceptional metrics — NRR above 110%, 40% repeat customer rate, diversified traffic, zero customer concentration risk — can command a premium above the typical range. A business with multiple red flags should be offered at the low end of its category range with an earnout structure tying the remainder to actual post-close performance.

How to Use SDE in Your Offer and Negotiation

Understanding SDE isn't just for analysis — it's a negotiation tool. Here's how sophisticated buyers use it.

Recalculate SDE from raw data. Don't accept the seller's SDE figure as given. Pull the financials yourself — tax returns, bank statements, payment processor data — and calculate SDE from scratch. Compare your calculation to the seller's. If there's more than a 10% discrepancy, demand a line-by-line reconciliation. Discrepancies are almost always in the add-backs — sellers add things back that aren't legitimate. Your recalculated SDE is your valuation base.

Use the TTM (trailing twelve months) average, not the peak month. Many listings show TTM SDE based on a specific 12-month window that happens to include the best months. Ask for 36 months of monthly data and calculate a 36-month average SDE alongside the TTM. If the TTM average is significantly higher than the 36-month average, the business is on a peak that may not sustain — value it on the longer-term average and explain your math clearly to the seller.

Weight the most recent 6 months heavily. A declining SDE trend is more important than the TTM average. If monthly SDE was $35,000 eighteen months ago and is $22,000 today, applying a 3x multiple to the $35,000 peak figure significantly overpays relative to current performance. Apply the multiple to a weighted average that accounts for the trend — or make the trend part of your negotiating position.

Build the earnout around SDE targets. If you and the seller disagree on what SDE will be post-close — seller says $300,000, you calculate $230,000 — structure an earnout: pay for $230,000 SDE at close, with an additional payment if SDE reaches $300,000 in the first 12 months post-close. The seller who's confident in their number accepts. The seller who knows the SDE is declining resists — which tells you everything you need to know.

The best place to practice applying SDE analysis is on actual listings. Browse active deals on Empire Flippers and Flippa and recalculate the SDE yourself from the financial summaries they provide. Compare your calculation to the listed price. You'll start to quickly identify which listings are fairly priced and which are asking for multiples that don't hold up to scrutiny.

Bottom Line: SDE Is the Foundation of Every Deal

You cannot evaluate an online business acquisition without understanding SDE. It's the number that determines whether a listing is priced fairly or at a premium you can't justify. It's the number you'll negotiate on, build your LOI around, and reference throughout due diligence. And it's the number most prone to seller manipulation — which is why knowing how to calculate it yourself from raw data is a non-negotiable skill for serious acquirers.

Take the formula, apply it to three or four actual listings you find this week, and compare your calculations to the listed prices. You'll immediately start to see the difference between well-priced businesses and ones where the seller is hoping buyers don't check the math. That gap is where smart acquisitions happen.