Difference between revisions of "Documentation/How Tos/Calc: DDB function"

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|toccontent= <div style="padding: 4px; font-size: 130%; font-weight: hidden; background-color:#DCE9FC;">FUNCTIONS</div>
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<div style="font-size: 140%; border-style: outset outset outset none; border-color:#DCE9FC;">Depreciation</div>
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* [[Documentation/How_Tos/Calc:_AMORDEGRC_function|<div style="font-size: 120%;">Amordegrc]]
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* [[Documentation/How_Tos/Calc:_AMORLINC_function|<div style="font-size: 120%;">Amorlinc]]
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* [[Documentation/How_Tos/Calc:_DB_function|<div style="font-size: 120%;">Db]]
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* [[Documentation/How_Tos/Calc:_DDB_function|<div style="font-size: 120%; border-style: double; border-color:#778899;">Ddb]]
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* [[Documentation/How_Tos/Calc:_SLN_function|<div style="font-size: 120%;">Sln]]
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* [[Documentation/How_Tos/Calc:_SYD_function|<div style="font-size: 120%;">Syd]]
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* [[Documentation/How_Tos/Calc:_VDB_function|<div style="font-size: 120%;">Vdb]]
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<div style="font-size: 140%; border-style: outset outset outset none; border-color:#DCE9FC;">Payment Streams, Annuities, Loans</div>
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* [[Documentation/How_Tos/Calc:_CUMIPMT_function|<div style="font-size: 120%;">Cumipmt]]
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* [[Documentation/How_Tos/Calc:_CUMIPMT_ADD_function|<div style="font-size: 120%;">Cumipmt Add]]
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* [[Documentation/How_Tos/Calc:_CUMPRINC_function|<div style="font-size: 120%;">Cumprinc]]
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* [[Documentation/How_Tos/Calc:_CUMPRINC_ADD_function|<div style="font-size: 120%;">Cumpinc Add]]
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* [[Documentation/How_Tos/Calc:_FV_function|<div style="font-size: 120%;">Fv]]
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* [[Documentation/How_Tos/Calc:_FVSCHEDULE_function|<div style="font-size: 120%;">Fvschedule]]
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* [[Documentation/How_Tos/Calc:_IPMT_function|<div style="font-size: 120%;">Ipmt]]
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* [[Documentation/How_Tos/Calc:_IRR_function|<div style="font-size: 120%;">Irr]]
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* [[Documentation/How_Tos/Calc:_ISPMT_function|<div style="font-size: 120%;">Ispmt]]
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* [[Documentation/How_Tos/Calc:_MIRR_function|<div style="font-size: 120%;">Mirr]]
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* [[Documentation/How_Tos/Calc:_NPER_function|<div style="font-size: 120%;">Nper]]
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* [[Documentation/How_Tos/Calc:_NPV_function|<div style="font-size: 120%;">Npv]]
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* [[Documentation/How_Tos/Calc:_PMT_function|<div style="font-size: 120%;">Pmt]]
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* [[Documentation/How_Tos/Calc:_PPMT_function|<div style="font-size: 120%;">Ppmt]]
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* [[Documentation/How_Tos/Calc:_PV_function|<div style="font-size: 120%;">Pv]]
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* [[Documentation/How_Tos/Calc:_RATE_function|<div style="font-size: 120%;">Rate]]
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* [[Documentation/How_Tos/Calc:_RRI_function|<div style="font-size: 120%;">Rri]]
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* [[Documentation/How_Tos/Calc:_XIRR_function|<div style="font-size: 120%;">Xirr]]
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* [[Documentation/How_Tos/Calc:_XNPV_function|<div style="font-size: 120%;">Xnpv]]
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<div style="font-size: 140%; border-style: outset outset outset none; border-color:#DCE9FC;">Securities</div>
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* [[Documentation/How_Tos/Calc:_ACCRINT_function|<div style="font-size: 120%;">Accrint]]
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* [[Documentation/How_Tos/Calc:_ACCRINTM_function|<div style="font-size: 120%;">Accrintm]]
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* [[Documentation/How_Tos/Calc:_DISC_function|<div style="font-size: 120%;">Disc]]
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* [[Documentation/How_Tos/Calc:_DURATION_function|<div style="font-size: 120%;">Duration]]
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* [[Documentation/How_Tos/Calc:_DURATION_ADD_function|<div style="font-size: 120%;">Duration Add]]
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* [[Documentation/How_Tos/Calc:_EFFECTIVE_function|<div style="font-size: 120%;">Effective]]
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* [[Documentation/How_Tos/Calc:_EFFECT_ADD_function|<div style="font-size: 120%;">Effect Add]]
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* [[Documentation/How_Tos/Calc:_INTRATE_function|<div style="font-size: 120%;">Intrate]]
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* [[Documentation/How_Tos/Calc:_MDURATION_function|<div style="font-size: 120%;">Mduration]]
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* [[Documentation/How_Tos/Calc:_DURATION_ADD_function|<div style="font-size: 120%;">Duration Add]]
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* [[Documentation/How_Tos/Calc:_NOMINAL_function|<div style="font-size: 120%;">Nominal]]
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* [[Documentation/How_Tos/Calc:_NOMINAL_ADD_function|<div style="font-size: 120%;">Nominal Add]]
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* [[Documentation/How_Tos/Calc:_ODDFPRICE_function|<div style="font-size: 120%;">Oddfprice]]
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* [[Documentation/How_Tos/Calc:_ODDFYIELD_function|<div style="font-size: 120%;">Oddfyield]]
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<div style="font-size: 140%; border-style: outset outset outset none; border-color:#DCE9FC;">Coupons</div>
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* [[Documentation/How_Tos/Calc:_COUPDAYBS_function|<div style="font-size: 120%;">Coupdaybs]]
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* [[Documentation/How_Tos/Calc:_COUPDAYS_function|<div style="font-size: 120%;">Coupdays]]
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* [[Documentation/How_Tos/Calc:_COUPDAYSNC_function|<div style="font-size: 120%;">Coupdaysnc]]
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* [[Documentation/How_Tos/Calc:_COUPNCD_function|<div style="font-size: 120%;">Coupncd]]
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* [[Documentation/How_Tos/Calc:_COUPNUM_function|<div style="font-size: 120%;">Coupnum]]
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* [[Documentation/How_Tos/Calc:_COUPPCD_function|<div style="font-size: 120%;">Couppcd]]
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<div style="font-size: 140%; border-style: outset outset outset none; border-color:#DCE9FC;">Miscellaneous</div>
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* [[Documentation/How_Tos/Calc:_DOLLARDE_function|<div style="font-size: 120%;">Coupdaybs]]
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* [[Documentation/How_Tos/Calc:_DOLLARFR_function|<div style="font-size: 120%;">Coupdays]]
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}}__TOC__
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== DDB ==
 
== DDB ==

Latest revision as of 15:09, 30 January 2024

DDB

Returns the depreciation of an asset for a given year using the double (or other factor) declining-balance method.

Syntax:

DDB(originalcost; salvagevalue; lifetime; year; factor)

originalcost: the initial cost of the asset.
salvagevalue: is the value at the end of the depreciation (sometimes called the salvage value of the asset).
lifetime: the number of years over which the asset is being depreciated.
year: the year number for which the depreciation is calculated.
factor: the factor to set the depreciation rate (2 if omitted).
To calculate depreciation, DDB uses a fixed rate. When factor = 2 this is the double-declining-balance method (because it is double the straight-line rate that would depreciate the asset to zero). The rate is given by:
rate = factor / lifetime.
The depreciation each year is calculated as
MINIMUM( book_value_at_start_of_year * rate; book_value_at_start_of_year - salvagevalue )
Thus the asset depreciates at rate until the book value is salvagevalue.

Example:

Calc ddb graph1.png

DDB(12000; 3000; 5; 1)

returns 4800 in currency units. The rate is 2/5, or 40%. The book value at the start of year 1 is 12000, and 40% of 12000 is 4800.

DDB(12000; 3000; 5; 2)

returns 2880 in currency units. The book value at the start of year 2 is 12000 - 4800 = 7200, and 40% of 7200 is 2880.

DDB(12000; 3000; 5; 3)

returns 1320 in currency units. The book value at the start of year 3 is 7200 - 2880 = 4320; and 40% of 4320 is 1728 - but DDB returns only enough depreciation to reduce the book value to the salvage value - that is 4320 - 3000 = 1320.

DDB(12000; 3000; 5; 4)

returns 0 in currency units. The book value at the start of year 4 is equal to the salvage value; no further depreciation is possible.


Issues:

  • Note that this method may not depreciate the asset fully to its salvage value. For example, DDB(1000; 0; 3; 1) + DDB(1000; 0; 3; 2) + DDB(1000; 0; 3; 3) = 962.96, leaving a residual value of 37.04 instead of 0. The VDB function is an alternative which overcomes this.



See Also
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