I found a ROUNDUP equivalent from this link: http://allenbrowne.com/round.html#RoundUp

To round upwards towards the next highest number, take advantage of the way Int() rounds negative numbers downwards, like this: - Int( - [MyField])

As shown above, Int(-2.1) rounds down to -3. Therefore this expression rounds 2.1 up to 3.

To round up to the higher cent, multiply by -100, round, and divide by -100: Int(-100 * [MyField]) / -100

The syntax is counter-intuitive, but it works exactly as I intended.

This is an old Access trick I learned a very long time ago, and it makes use of the way Access handles fractional, negative numbers. Try this:

-Int(-[DecimalValue])

It's odd, but it will always round your numbers up to the nearest whole number.

Be careful, the VBA Round function uses Banker's rounding, where it rounds .5 to an even number, like so:

Round (12.55, 1) would return 12.6 (rounds up) 
Round (12.65, 1) would return 12.6 (rounds down) 
Round (12.75, 1) would return 12.8 (rounds up)   

Whereas the Excel Worksheet Function Round, always rounds .5 up.

I've done some tests and it looks like .5 up rounding (symmetric rounding) is also used by cell formatting, and also for Column Width rounding (when using the General Number format). The 'Precision as displayed' flag doesn't appear to do any rounding itself, it just uses the rounded result of the cell format.

I tried to implement the SymArith function from Microsoft in VBA for my rounding, but found that Fix has an error when you try to give it a number like 58.55; the function giving a result of 58.5 instead of 58.6. I then finally discovered that you can use the Excel Worksheet Round function, like so:

Application.Round(58.55, 1)

This will allow you to do normal rounding in VBA, though it may not be as quick as some custom function. I realize that this has come full circle from the question, but wanted to include it for completeness.

You can use the RoundUp and RoundDown functions found here at Experts Exchange and here at GitHub.

Your usage would be:

Value = 27.605 
Value1 = RoundUp(Value, 2)    ' 27.61 
Value2 = RoundDown(Value, 2)  ' 27.6

These are the functions:

' Rounds Value up with count of decimals as specified with parameter NumDigitsAfterDecimals.
'
' Rounds to integer if NumDigitsAfterDecimals is zero.
'
' Optionally, rounds negative values away from zero.
'
' Uses CDec() for correcting bit errors of reals.
'
' Execution time is about 0.5µs for rounding to integer
' else about 1µs.
'
Public Function RoundUp( _
    ByVal Value As Variant, _
    Optional ByVal NumDigitsAfterDecimals As Long, _
    Optional ByVal RoundingAwayFromZero As Boolean) _
    As Variant

    Dim Scaling     As Variant
    Dim ScaledValue As Variant
    Dim ReturnValue As Variant

    ' Only round if Value is numeric and ReturnValue can be different from zero.
    If Not IsNumeric(Value) Then
        ' Nothing to do.
        ReturnValue = Null
    ElseIf Value = 0 Then
        ' Nothing to round.
        ' Return Value as is.
        ReturnValue = Value
    Else
        If NumDigitsAfterDecimals <> 0 Then
            Scaling = CDec(Base10 ^ NumDigitsAfterDecimals)
        Else
            Scaling = 1
        End If
        If Scaling = 0 Then
            ' A very large value for Digits has minimized scaling.
            ' Return Value as is.
            ReturnValue = Value
        ElseIf RoundingAwayFromZero = False Or Value > 0 Then
            ' Round numeric value up.
            If Scaling = 1 Then
                ' Integer rounding.
                ReturnValue = -Int(-Value)
            Else
                ' First try with conversion to Decimal to avoid bit errors for some reals like 32.675.
                On Error Resume Next
                ScaledValue = -Int(CDec(-Value) * Scaling)
                ReturnValue = ScaledValue / Scaling
                If Err.Number <> 0 Then
                    ' Decimal overflow.
                    ' Round Value without conversion to Decimal.
                    ScaledValue = -Int(-Value * Scaling)
                    ReturnValue = ScaledValue / Scaling
                End If
            End If
        Else
            ' Round absolute value up.
            If Scaling = 1 Then
                ' Integer rounding.
                ReturnValue = Int(Value)
            Else
                ' First try with conversion to Decimal to avoid bit errors for some reals like 32.675.
                On Error Resume Next
                ScaledValue = Int(CDec(Value) * Scaling)
                ReturnValue = ScaledValue / Scaling
                If Err.Number <> 0 Then
                    ' Decimal overflow.
                    ' Round Value without conversion to Decimal.
                    ScaledValue = Int(Value * Scaling)
                    ReturnValue = ScaledValue / Scaling
                End If
            End If
        End If
        If Err.Number <> 0 Then
            ' Rounding failed because values are near one of the boundaries of type Double.
            ' Return value as is.
            ReturnValue = Value
        End If
    End If

    RoundUp = ReturnValue

End Function

And:

' Rounds Value down with count of decimals as specified with parameter NumDigitsAfterDecimals.
'
' Rounds to integer if NumDigitsAfterDecimals is zero.
'
' Optionally, rounds negative values towards zero.
'
' Uses CDec() for correcting bit errors of reals.
'
' Execution time is about 0.5µs for rounding to integer
' else about 1µs.
'
Public Function RoundDown( _
    ByVal Value As Variant, _
    Optional ByVal NumDigitsAfterDecimals As Long, _
    Optional ByVal RoundingToZero As Boolean) _
    As Variant

    Dim Scaling     As Variant
    Dim ScaledValue As Variant
    Dim ReturnValue As Variant

    ' Only round if Value is numeric and ReturnValue can be different from zero.
    If Not IsNumeric(Value) Then
        ' Nothing to do.
        ReturnValue = Null
    ElseIf Value = 0 Then
        ' Nothing to round.
        ' Return Value as is.
        ReturnValue = Value
    Else
        If NumDigitsAfterDecimals <> 0 Then
            Scaling = CDec(Base10 ^ NumDigitsAfterDecimals)
        Else
            Scaling = 1
        End If
        If Scaling = 0 Then
            ' A very large value for Digits has minimized scaling.
            ' Return Value as is.
            ReturnValue = Value
        ElseIf RoundingToZero = False Then
            ' Round numeric value down.
            If Scaling = 1 Then
                ' Integer rounding.
                ReturnValue = Int(Value)
            Else
                ' First try with conversion to Decimal to avoid bit errors for some reals like 32.675.
                ' Very large values for NumDigitsAfterDecimals can cause an out-of-range error when dividing.
                On Error Resume Next
                ScaledValue = Int(CDec(Value) * Scaling)
                ReturnValue = ScaledValue / Scaling
                If Err.Number <> 0 Then
                    ' Decimal overflow.
                    ' Round Value without conversion to Decimal.
                    ScaledValue = Int(Value * Scaling)
                    ReturnValue = ScaledValue / Scaling
                End If
            End If
        Else
            ' Round absolute value down.
            If Scaling = 1 Then
                ' Integer rounding.
                ReturnValue = Fix(Value)
            Else
                ' First try with conversion to Decimal to avoid bit errors for some reals like 32.675.
                ' Very large values for NumDigitsAfterDecimals can cause an out-of-range error when dividing.
                On Error Resume Next
                ScaledValue = Fix(CDec(Value) * Scaling)
                ReturnValue = ScaledValue / Scaling
                If Err.Number <> 0 Then
                    ' Decimal overflow.
                    ' Round Value with no conversion.
                    ScaledValue = Fix(Value * Scaling)
                    ReturnValue = ScaledValue / Scaling
                End If
            End If
        End If
        If Err.Number <> 0 Then
            ' Rounding failed because values are near one of the boundaries of type Double.
            ' Return value as is.
            ReturnValue = Value
        End If
    End If

    RoundDown = ReturnValue

End Function

Note please, that the native Round of VBA is quite buggy. See the test module of the download.