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Straight Line Depreciation Calculator | Free Asset Schedule Tool
📉 Accountancy · Fixed Assets · Depreciation

Straight Line Depreciation Calculator | Free Asset Schedule Tool

Calculate annual depreciation, book value and full asset schedules instantly. Pro mode adds Double Declining Balance, Sum-of-Years-Digits, Units of Production, method comparison, visual chart and CSV/PDF export.

● Pro Version is Free for now
✓ DDB · SYD · Units of Production · Chart · Comparison · CSV · PDF Export
📉 Depreciation Calculator
📌 Load a sample:
Straight Line Depreciation — spreads the depreciable cost evenly across the asset's useful life. Annual Depreciation = (Cost − Salvage Value) ÷ Useful Life.
Annual Dep. = (Cost − Salvage) ÷ Life
Constant amount each year · Simplest method · GAAP & IFRS compliant
Purchase price including installation
$
Estimated residual value at end of life
$
Expected years of productive use
⚠ Please check your inputs — cost must be greater than salvage value, useful life must be at least 1 year.
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`; const blob = new Blob([html], {type:'text/html;charset=utf-8;'}); const url = URL.createObjectURL(blob); const a = document.createElement('a'); a.href = url; a.download = safeFilename(inp.assetName)+'_depreciation.html'; document.body.appendChild(a); a.click(); setTimeout(()=>{ document.body.removeChild(a); URL.revokeObjectURL(url); }, 200); toast('✓ HTML downloaded'); }catch(e){ toast('HTML error: '+e.message); } }function printReport(){ if(!lastSchedule.length){toast('⚠ Calculate a schedule first');return;} try{ const inp = lastInputs; const sym = inp.currency||'$'; const tableHTML = buildCleanTableHTML(); const w = window.open('','_blank'); if(!w){ toast('⚠ Allow pop-ups to use Print/PDF'); return; } w.document.write(`Depreciation Report — ${inp.assetName||'Asset'}

Depreciation Schedule

Generated by SmallStudyTools.com • ${new Date().toLocaleDateString('en-GB',{day:'2-digit',month:'long',year:'numeric'})}

${inp.assetName||'—'}
${METHOD_LABEL[curMethod]||'Straight Line'}
${sym}${Number(inp.cost).toLocaleString('en-US',{minimumFractionDigits:2})}
${sym}${Number(inp.salvage).toLocaleString('en-US',{minimumFractionDigits:2})}
${sym}${(Number(inp.cost)-Number(inp.salvage)).toLocaleString('en-US',{minimumFractionDigits:2})}
${inp.life} years
${sym}${Number(lastSchedule[0]?.dep||0).toLocaleString('en-US',{minimumFractionDigits:2})}
${curMethod==='sld'?(100/inp.life).toFixed(2)+'%':'Variable'}
${inp.startYear?`
${inp.startYear} – ${inp.startYear+inp.life-1}
`:'
'}
${tableHTML}

SmallStudyTools.com • For informational and educational purposes only • Not financial advice

`); w.document.close(); toast('✓ Print window opened'); }catch(e){ toast('Print error: '+e.message); } }function copyTable(){ if(!lastSchedule.length){toast('⚠ Calculate a schedule first');return;} try{ const text = getCSVData(); if(navigator.clipboard && navigator.clipboard.writeText){ navigator.clipboard.writeText(text) .then(()=>toast('✓ Copied to clipboard')) .catch(()=>fallbackCopy(text)); } else { fallbackCopy(text); } }catch(e){ toast('Copy error: '+e.message); } }function fallbackCopy(text){ const ta = document.createElement('textarea'); ta.value = text; ta.style.cssText = 'position:fixed;top:-9999px;left:-9999px;opacity:0'; document.body.appendChild(ta); ta.focus(); ta.select(); try{ document.execCommand('copy'); toast('✓ Copied to clipboard'); }catch(e){ toast('Copy failed — use CSV download instead'); } document.body.removeChild(ta); }// ── UTILS ───────────────────────────────────────────────────── function toast(msg){const t=document.getElementById('toast');t.textContent=msg;t.classList.add('show');setTimeout(()=>t.classList.remove('show'),2600);}// ── INIT ────────────────────────────────────────────────────── try{const m=localStorage.getItem('sst_dep_mode');if(m==='pro')setAppMode('pro');}catch(e){}

Free Straight Line Depreciation Calculator — All Asset Types, All Methods

Whether you need a straight line depreciation calculator, an asset depreciation calculator, or an equipment depreciation calculator, our free engine provides compliant bookkeeping values instantly — no spreadsheet formulas to write, no accounting software subscription required. Enter your asset cost, salvage value and useful life and receive the full annual depreciation schedule, accumulated depreciation totals and closing book value for every year of the asset's life, formatted exactly as required for financial statements under GAAP and IFRS.

Fixed asset management is at the heart of accurate financial reporting. Depreciation allocates the cost of a tangible asset across the periods it generates economic benefit — transforming a large capital expenditure into a series of matching annual charges that align with the asset's productive use. The straight line method does this with the greatest simplicity: the same amount is expensed every year, making the income statement predictable and the balance sheet easy to audit. This tool automates that calculation and extends it to three additional methods — Double Declining Balance, Sum-of-Years-Digits and Units of Production — for situations where faster or usage-based expensing is more appropriate.

The Depreciation Formula — What the Calculator Computes

Our system runs a programmatic depreciation formula calculator based on GAAP guidelines. It computes the annual depreciation expense by taking the initial purchase asset cost, subtracting the salvage value to arrive at the depreciable base, and dividing that figure across the asset's expected useful life. Every value in the schedule — annual charge, accumulated depreciation and closing book value — is derived directly from this formula with no rounding until the final output.

Core Formula
Annual Dep. = (Cost − Salvage) ÷ Life
The depreciable base (Cost − Salvage) is divided equally across the useful life. Produces a constant annual charge — the defining characteristic of the straight line method.
Depreciation Rate
Rate = 1 ÷ Useful Life × 100%
The annual rate as a percentage. A 10-year asset has a 10% straight line rate. A 5-year asset depreciates at 20% per year. The rate is constant throughout the asset's life.
Book Value at Year N
BV = Cost − (Annual Dep. × N)
The asset's carrying amount on the balance sheet after N years of depreciation. Reaches exactly the salvage value at the end of the useful life.
Accumulated Depreciation
Acc. Dep. = Annual Dep. × Years Elapsed
The total depreciation charged to date. Shown as a credit balance in the fixed asset note, reducing the gross cost to produce the net book value shown on the balance sheet.

Pre-Built Sample Calculations — Four Asset Types Explained

The tool includes four pre-loaded sample buttons that demonstrate how different asset categories are handled. Each sample uses realistic values drawn from typical accounting practice — load any of them with one click to see a complete depreciation schedule immediately. The four examples below explain the accounting rationale behind each set of inputs.

🚗
Company Vehicle — Delivery Van
Cost: $32,000 · Salvage: $4,000 · Life: 5 years
Vehicles are among the most commonly depreciated assets in business accounts. This sample functions as a truck depreciation calculator and general tax vehicle depreciation calculator — the 5-year life and significant residual value reflect typical corporate fleet policy. For MACRS tax purposes, most light vehicles fall in the 5-year property class. The straight line result of $5,600 per year is suitable for P&L reporting; switch to Double Declining Balance in Pro mode to model the accelerated tax treatment and maximise early-year deductions on your corporation tax or self-assessment return.
🖥️
Office Equipment — Computer Setup
Cost: $8,500 · Salvage: $500 · Life: 4 years
Computer hardware, printers and peripheral equipment depreciate rapidly due to technological obsolescence. This equipment depreciation calculator sample uses a 4-year life — aligned with HMRC and IRS guidance for IT equipment. The low salvage value of $500 reflects the minimal residual worth of consumer-grade technology after 4 years of use. This sample is also useful for leasehold improvements, office fit-outs and small plant and machinery purchases where a short, clean schedule is needed for management accounts.
🏢
Commercial Building — Property
Cost: $500,000 · Salvage: $50,000 · Life: 40 years
Commercial buildings are long-lived assets with schedules spanning decades. This sample operates as a real estate depreciation calculator covering commercial property where a 40-year useful life reflects typical accounting policy. For US tax purposes, use 39 years for commercial property under MACRS. For residential rental property, the IRS mandates the MACRS 27.5 year depreciation calculator approach: enter the building cost (excluding land value), a salvage value of zero, and 27.5 as the life. This rental depreciation calculator output gives the exact annual deduction claimable on Schedule E of your federal tax return.
⚙️
Production Machinery
Cost: $75,000 · Salvage: $5,000 · Life: 10 years
Industrial machinery is ideally suited to the Units of Production method, which this sample pre-loads in Pro mode: 100,000 total estimated units, with actual annual output varying from 15,000 units in peak years to 6,000 in the asset's final years. This makes the annual depreciation charge directly proportional to the machine's actual use — aligning the expense precisely with the revenue it generates and avoiding over-stating profit in low-output years. The straight line alternative of $7,000 per year is available for simplicity when production volumes are relatively consistent year to year.

How to Use the Asset Depreciation Calculator — Step by Step

The annual depreciation expense calculator produces a complete fixed asset schedule in under ten seconds. Here is exactly how to use it for any asset type — from a single laptop to a commercial property portfolio.

1
Enter the asset costThe full purchase price including installation, delivery and any directly attributable costs required to bring the asset to its working condition. Do not include maintenance or revenue costs. Use the currency selector in Pro mode to switch between $, £, €, ₹ or other currencies.
2
Enter the salvage (residual) valueThe estimated amount the asset will be worth at the end of its useful life — the expected sale, scrap or trade-in value. Under MACRS (US tax), salvage value is zero. Under GAAP and IFRS, residual value should be a genuine estimate reviewed at each reporting date.
3
Enter the useful life in yearsThe number of years the business expects to use the asset productively. Common periods: vehicles 3–5 years, computers 3–4 years, plant and machinery 5–10 years, commercial buildings 25–40 years, residential rental property 27.5 years (MACRS).
4
Select your depreciation method (Pro)Choose Straight Line for equal annual charges. Switch to Double Declining Balance for accelerated tax deductions. Use Sum-of-Years-Digits for moderate front-loading. Select Units of Production for machinery where wear depends on output. Use Compare All to see all methods side by side.
5
Click Calculate and exportThe full schedule appears instantly. Export as CSV for Excel, JSON for accounting systems, HTML for web publication, or Print/PDF for client reports and audit files. The print report includes an asset summary header with method, annual charge, depreciable cost and useful life — ready to attach to a fixed asset register.
What the schedule shows for every year
Dep.
Annual charge
Acc. Dep.
Running total
Book Value
Closing balance
% Used
Progress bar

Choosing the Right Depreciation Method — Comparison Guide

Different depreciation methods produce very different results for the same asset — particularly in the early years. The choice affects your reported profit, your tax liability and your balance sheet values. The table below shows how the four methods compare for a £75,000 machine with £5,000 salvage value over 5 years.

MethodYear 1Year 2Year 3Year 4Year 5Best For
Straight Line (SLD)£14,000£14,000£14,000£14,000£14,000Buildings, fixtures, consistent-use assets
Double Declining (DDB)£30,000£18,000£10,800£1,200£0Vehicles, tech — maximising early tax relief
Sum-of-Years-Digits (SYD)£23,333£18,667£14,000£9,333£4,667Assets with declining productivity
Units of ProductionVariableVariableVariableVariableVariableMachinery with measurable output

The straight line method produces the lowest Year 1 depreciation charge of any method — which means the highest reported profit in Year 1. Accelerated methods (DDB and SYD) reduce Year 1 profit but increase early tax deductions. For financial reporting, the method chosen should reflect the pattern in which the asset's future economic benefits are expected to be consumed — not simply whichever produces the preferred tax outcome.

MACRS note for US users: The IRS does not permit straight line depreciation for most personal property under MACRS — it defaults to the 200% Declining Balance method (equivalent to DDB). However, taxpayers can elect out of MACRS and use the Alternative Depreciation System (ADS), which is straight line over a longer recovery period. For real property, MACRS residential rental uses straight line over 27.5 years and commercial property over 39 years. Use this tool as a MACRS 27.5 year depreciation calculator by entering 27.5 as the useful life and zero as salvage value.

Frequently Asked Questions

Common questions about depreciation methods, asset types and tax compliance

The straight line depreciation formula is: Annual Depreciation = (Cost − Salvage Value) ÷ Useful Life. This produces a constant annual charge — the same amount every year until the asset reaches its residual value. For a vehicle costing $32,000 with a $4,000 salvage value over 5 years, the annual depreciation is ($32,000 − $4,000) ÷ 5 = $5,600 per year. This tool calculates the full schedule automatically and outputs every year's depreciation charge, accumulated total and closing book value.

Yes. This tool works as a real estate depreciation calculator and a rental depreciation calculator. For US residential rental property, use it as a MACRS 27.5 year depreciation calculator by entering the building's depreciable basis (purchase price minus land value), a salvage value of zero, and 27.5 as the useful life. For UK property, use the commercial building allowance rate or your chosen accounting policy life. The annual depreciation figure feeds directly into your Schedule E (US) or property income pages (UK self-assessment).

To track company vans or trucks for corporate logistics, use the pre-loaded Company Vehicle sample or enter your own values. This tool functions as a truck depreciation calculator and a general tax vehicle depreciation calculator — enter the purchase price, expected trade-in value and years of business use. For faster early deductions that mirror the actual loss in market value of vehicles, switch to Double Declining Balance in Pro mode. The Compare All mode shows exactly how much more you can deduct in Year 1 under DDB versus straight line — useful when planning tax-efficient capital expenditure.

Our system runs a programmatic depreciation formula calculator based on GAAP guidelines. It computes the annual depreciation expense by taking the initial purchase asset cost, subtracting the salvage value to arrive at the depreciable base, and dividing that amount across its expected useful life. For the Double Declining Balance method, it applies twice the straight-line rate to the remaining book value each year, then automatically switches to straight line at the crossover point where SLD produces a higher charge. For Sum-of-Years-Digits, it multiplies the depreciable base by a fraction of remaining life over the sum of all year digits.

Straight line produces the same depreciation charge every year — simple, predictable and widely preferred for financial reporting. Double Declining Balance charges twice the straight-line rate applied to the remaining book value, producing a much higher expense in Year 1 that reduces each subsequent year. DDB is useful for tax purposes — higher early deductions reduce taxable profit sooner. This calculator's Compare All mode shows both methods side by side for your specific asset values so you can see the exact difference in annual charges, cumulative depreciation and closing book values year by year.

Five export options are available: Copy copies the full CSV-format schedule to your clipboard for pasting into Excel or Google Sheets. CSV download creates a file that opens directly in any spreadsheet application. JSON produces structured data for accounting software integration or developer use. HTML downloads a self-contained styled web page with the schedule formatted for sharing or embedding. Print / PDF opens a clean print-ready report with an asset summary header — use your browser's Save as PDF option to create a PDF file for audit files, client reports or fixed asset registers.

The straight line method is fully compliant with US GAAP (ASC 360) and international IFRS (IAS 16). Both frameworks permit straight line as the primary depreciation approach for property, plant and equipment. The figures produced — annual depreciation expense, accumulated depreciation and net book value — are the exact values required for fixed asset note disclosures in financial statements. For tax depreciation under MACRS (US), UK capital allowances or other jurisdictional rules, the accounting figures may differ from tax figures. Always confirm applicable tax rules with a qualified accountant.

MACRS 27.5 year is the IRS recovery period for residential rental property — meaning the depreciable basis of the building (excluding land) is written off over 27.5 years using the straight line method. To use this tool as a MACRS 27.5 year depreciation calculator: enter the building's adjusted basis (purchase price plus improvements, minus land allocation) as the Asset Cost; enter 0 as Salvage Value (MACRS uses zero); enter 27.5 as Useful Life. The resulting annual figure is your allowable Schedule E depreciation deduction. For commercial real property, the MACRS recovery period is 39 years — enter 39 as the useful life.

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